./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/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_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/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_7738bb85-1856-40a9-9675-91ae3526287d/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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- 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 17:27:17,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:27:17,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:27:17,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:27:17,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:27:17,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:27:17,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:27:17,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:27:17,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:27:17,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:27:17,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:27:17,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:27:17,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:27:17,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:27:17,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:27:17,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:27:17,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:27:17,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:27:17,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:27:17,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:27:17,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:27:17,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:27:17,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:27:17,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:27:17,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:27:17,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:27:17,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:27:17,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:27:17,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:27:17,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:27:17,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:27:17,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:27:17,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:27:17,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:27:17,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:27:17,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:27:17,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:27:17,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:27:17,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:27:17,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:27:17,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:27:17,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:27:17,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:27:17,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:27:17,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:27:17,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:27:17,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:27:17,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:27:17,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:27:17,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:27:17,537 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:27:17,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:27:17,537 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:27:17,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:27:17,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:27:17,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:27:17,539 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:27:17,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:27:17,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:27:17,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:27:17,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:27:17,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:27:17,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:27:17,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:27:17,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:27:17,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:27:17,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:27:17,540 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:27:17,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:27:17,541 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:27:17,541 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_7738bb85-1856-40a9-9675-91ae3526287d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-12-13 17:27:17,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:27:17,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:27:17,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:27:17,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:27:17,769 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:27:17,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-12-13 17:27:20,286 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:27:20,438 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:27:20,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-12-13 17:27:20,444 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/data/75ee7514b/9b96dce95b854b4e86c3813840de25f6/FLAG993183f50 [2022-12-13 17:27:20,863 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/data/75ee7514b/9b96dce95b854b4e86c3813840de25f6 [2022-12-13 17:27:20,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:27:20,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:27:20,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:27:20,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:27:20,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:27:20,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:27:20" (1/1) ... [2022-12-13 17:27:20,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7261ae8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:20, skipping insertion in model container [2022-12-13 17:27:20,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:27:20" (1/1) ... [2022-12-13 17:27:20,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:27:20,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:27:21,024 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_7738bb85-1856-40a9-9675-91ae3526287d/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-12-13 17:27:21,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:27:21,043 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:27:21,063 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-12-13 17:27:21,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:27:21,081 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:27:21,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21 WrapperNode [2022-12-13 17:27:21,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:27:21,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:27:21,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:27:21,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:27:21,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,123 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 162 [2022-12-13 17:27:21,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:27:21,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:27:21,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:27:21,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:27:21,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,149 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:27:21,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:27:21,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:27:21,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:27:21,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (1/1) ... [2022-12-13 17:27:21,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:27:21,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:21,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:27:21,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:27:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:27:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:27:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:27:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:27:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:27:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:27:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:27:21,216 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 17:27:21,302 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:27:21,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:27:21,565 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:27:21,574 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:27:21,574 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 17:27:21,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:27:21 BoogieIcfgContainer [2022-12-13 17:27:21,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:27:21,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:27:21,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:27:21,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:27:21,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:27:20" (1/3) ... [2022-12-13 17:27:21,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@faf14af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:27:21, skipping insertion in model container [2022-12-13 17:27:21,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:27:21" (2/3) ... [2022-12-13 17:27:21,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@faf14af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:27:21, skipping insertion in model container [2022-12-13 17:27:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:27:21" (3/3) ... [2022-12-13 17:27:21,585 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-12-13 17:27:21,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:27:21,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 17:27:21,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:27:21,679 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:27:21,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 232 transitions, 480 flow [2022-12-13 17:27:21,791 INFO L130 PetriNetUnfolder]: 14/230 cut-off events. [2022-12-13 17:27:21,791 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:27:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 230 events. 14/230 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 372 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2022-12-13 17:27:21,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 232 transitions, 480 flow [2022-12-13 17:27:21,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 225 transitions, 462 flow [2022-12-13 17:27:21,809 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:27:21,817 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 225 transitions, 462 flow [2022-12-13 17:27:21,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 225 transitions, 462 flow [2022-12-13 17:27:21,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 225 transitions, 462 flow [2022-12-13 17:27:21,874 INFO L130 PetriNetUnfolder]: 14/225 cut-off events. [2022-12-13 17:27:21,874 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:27:21,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 225 events. 14/225 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 351 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2022-12-13 17:27:21,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 11748 [2022-12-13 17:27:27,426 INFO L134 LiptonReduction]: Checked pairs total: 9817 [2022-12-13 17:27:27,426 INFO L136 LiptonReduction]: Total number of compositions: 253 [2022-12-13 17:27:27,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:27:27,441 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;@1f7ff84a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:27:27,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 17:27:27,442 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 17:27:27,442 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:27:27,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:27,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 17:27:27,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash 939, now seen corresponding path program 1 times [2022-12-13 17:27:27,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:27,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462406538] [2022-12-13 17:27:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:27,519 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 17:27:27,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462406538] [2022-12-13 17:27:27,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462406538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:27,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:27,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 17:27:27,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891063054] [2022-12-13 17:27:27,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:27:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:27:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:27:27,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 485 [2022-12-13 17:27:27,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 17:27:27,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:27,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 485 [2022-12-13 17:27:27,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:27,610 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-12-13 17:27:27,610 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:27:27,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 508 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-12-13 17:27:27,613 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-12-13 17:27:27,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-12-13 17:27:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:27:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 17:27:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 452 transitions. [2022-12-13 17:27:27,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.465979381443299 [2022-12-13 17:27:27,625 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 452 transitions. [2022-12-13 17:27:27,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 452 transitions. [2022-12-13 17:27:27,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:27,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 452 transitions. [2022-12-13 17:27:27,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 17:27:27,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 485.0) internal successors, (1455), 3 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 17:27:27,634 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 485.0) internal successors, (1455), 3 states have internal predecessors, (1455), 0 states have call successors, (0), 0 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 17:27:27,636 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 452 transitions. [2022-12-13 17:27:27,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-12-13 17:27:27,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:27:27,639 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-12-13 17:27:27,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-12-13 17:27:27,642 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 17:27:27,642 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-12-13 17:27:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 17:27:27,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:27,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:27:27,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:27:27,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash 925525, now seen corresponding path program 1 times [2022-12-13 17:27:27,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:27,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54887515] [2022-12-13 17:27:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:27,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:27,740 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 17:27:27,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:27,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54887515] [2022-12-13 17:27:27,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54887515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:27,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:27,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:27:27,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293783260] [2022-12-13 17:27:27,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:27,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:27:27,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:27,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:27:27,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:27:27,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 485 [2022-12-13 17:27:27,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 17:27:27,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:27,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 485 [2022-12-13 17:27:27,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:27,826 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-12-13 17:27:27,827 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:27:27,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 455 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-12-13 17:27:27,828 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 17:27:27,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-12-13 17:27:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:27:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:27:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2022-12-13 17:27:27,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43780068728522337 [2022-12-13 17:27:27,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2022-12-13 17:27:27,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2022-12-13 17:27:27,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:27,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2022-12-13 17:27:27,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 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 17:27:27,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:27,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:27,838 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 637 transitions. [2022-12-13 17:27:27,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-12-13 17:27:27,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:27:27,839 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-12-13 17:27:27,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-12-13 17:27:27,839 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 17:27:27,839 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-12-13 17:27:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 17:27:27,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:27,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:27:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:27:27,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 925526, now seen corresponding path program 1 times [2022-12-13 17:27:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:27,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542643474] [2022-12-13 17:27:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:27,952 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 17:27:27,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:27,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542643474] [2022-12-13 17:27:27,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542643474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:27,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:27,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:27:27,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623565228] [2022-12-13 17:27:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:27,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:27:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:27:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:27:27,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 485 [2022-12-13 17:27:27,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:27,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:27,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 485 [2022-12-13 17:27:27,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:28,029 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-12-13 17:27:28,029 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:27:28,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 407 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-12-13 17:27:28,030 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 17:27:28,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-12-13 17:27:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:27:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:27:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2022-12-13 17:27:28,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4446735395189003 [2022-12-13 17:27:28,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2022-12-13 17:27:28,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2022-12-13 17:27:28,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:28,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2022-12-13 17:27:28,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 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 17:27:28,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:28,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:28,039 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 647 transitions. [2022-12-13 17:27:28,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-12-13 17:27:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:27:28,040 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-12-13 17:27:28,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-12-13 17:27:28,041 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 17:27:28,041 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-12-13 17:27:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:28,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:28,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:27:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:27:28,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash 889449804, now seen corresponding path program 1 times [2022-12-13 17:27:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:28,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466146714] [2022-12-13 17:27:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:28,164 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 17:27:28,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:28,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466146714] [2022-12-13 17:27:28,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466146714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:28,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:28,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:27:28,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981745172] [2022-12-13 17:27:28,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:28,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:27:28,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:27:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:27:28,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 485 [2022-12-13 17:27:28,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:28,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:28,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 485 [2022-12-13 17:27:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:28,224 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-12-13 17:27:28,224 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:27:28,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 282 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-12-13 17:27:28,225 INFO L137 encePairwiseOnDemand]: 483/485 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 17:27:28,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-12-13 17:27:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:27:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:27:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2022-12-13 17:27:28,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43711340206185567 [2022-12-13 17:27:28,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2022-12-13 17:27:28,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2022-12-13 17:27:28,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:28,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2022-12-13 17:27:28,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 17:27:28,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:28,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:28,234 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 636 transitions. [2022-12-13 17:27:28,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-12-13 17:27:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:27:28,235 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-12-13 17:27:28,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-12-13 17:27:28,235 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 17:27:28,236 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-12-13 17:27:28,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:28,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:28,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:27:28,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:27:28,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:28,237 INFO L85 PathProgramCache]: Analyzing trace with hash 889449803, now seen corresponding path program 1 times [2022-12-13 17:27:28,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:28,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841181490] [2022-12-13 17:27:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:28,315 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 17:27:28,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:28,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841181490] [2022-12-13 17:27:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841181490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:28,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:28,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:27:28,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181530031] [2022-12-13 17:27:28,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:28,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:27:28,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:27:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:27:28,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 485 [2022-12-13 17:27:28,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 17:27:28,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:28,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 485 [2022-12-13 17:27:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:28,399 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-12-13 17:27:28,399 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:27:28,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 171 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-12-13 17:27:28,400 INFO L137 encePairwiseOnDemand]: 483/485 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 17:27:28,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-12-13 17:27:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:27:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:27:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-12-13 17:27:28,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4261168384879725 [2022-12-13 17:27:28,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-12-13 17:27:28,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-12-13 17:27:28,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:28,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-12-13 17:27:28,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 17:27:28,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:28,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 17:27:28,409 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 620 transitions. [2022-12-13 17:27:28,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-12-13 17:27:28,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:27:28,409 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-12-13 17:27:28,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-12-13 17:27:28,410 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 17:27:28,410 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-12-13 17:27:28,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 17:27:28,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:28,411 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:27:28,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1792837747, now seen corresponding path program 1 times [2022-12-13 17:27:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138442443] [2022-12-13 17:27:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:28,688 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 17:27:28,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:28,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138442443] [2022-12-13 17:27:28,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138442443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:28,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:28,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:27:28,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129151555] [2022-12-13 17:27:28,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:28,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:28,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:28,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:28,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:28,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 485 [2022-12-13 17:27:28,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 17:27:28,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:28,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 485 [2022-12-13 17:27:28,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:28,837 INFO L130 PetriNetUnfolder]: 64/118 cut-off events. [2022-12-13 17:27:28,837 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:27:28,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 118 events. 64/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 326 event pairs, 1 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 243. Up to 85 conditions per place. [2022-12-13 17:27:28,838 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2022-12-13 17:27:28,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 35 transitions, 151 flow [2022-12-13 17:27:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1049 transitions. [2022-12-13 17:27:28,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43257731958762885 [2022-12-13 17:27:28,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1049 transitions. [2022-12-13 17:27:28,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1049 transitions. [2022-12-13 17:27:28,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:28,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1049 transitions. [2022-12-13 17:27:28,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 0 states have call successors, (0), 0 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 17:27:28,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:28,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:28,850 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 5 states and 1049 transitions. [2022-12-13 17:27:28,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 35 transitions, 151 flow [2022-12-13 17:27:28,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 35 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:27:28,851 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 72 flow [2022-12-13 17:27:28,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2022-12-13 17:27:28,852 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2022-12-13 17:27:28,852 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 72 flow [2022-12-13 17:27:28,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 17:27:28,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:28,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:27:28,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash -438235931, now seen corresponding path program 2 times [2022-12-13 17:27:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:28,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312752203] [2022-12-13 17:27:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:29,088 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 17:27:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312752203] [2022-12-13 17:27:29,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312752203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:29,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:29,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:27:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494738360] [2022-12-13 17:27:29,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:29,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:29,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 485 [2022-12-13 17:27:29,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 17:27:29,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:29,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 485 [2022-12-13 17:27:29,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:29,206 INFO L130 PetriNetUnfolder]: 61/110 cut-off events. [2022-12-13 17:27:29,206 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 17:27:29,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 110 events. 61/110 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 283 event pairs, 7 based on Foata normal form. 1/99 useless extension candidates. Maximal degree in co-relation 318. Up to 85 conditions per place. [2022-12-13 17:27:29,207 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 19 selfloop transitions, 6 changer transitions 5/32 dead transitions. [2022-12-13 17:27:29,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 171 flow [2022-12-13 17:27:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1045 transitions. [2022-12-13 17:27:29,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4309278350515464 [2022-12-13 17:27:29,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1045 transitions. [2022-12-13 17:27:29,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1045 transitions. [2022-12-13 17:27:29,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:29,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1045 transitions. [2022-12-13 17:27:29,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 17:27:29,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:29,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:29,218 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 72 flow. Second operand 5 states and 1045 transitions. [2022-12-13 17:27:29,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 171 flow [2022-12-13 17:27:29,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:27:29,220 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 104 flow [2022-12-13 17:27:29,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2022-12-13 17:27:29,220 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2022-12-13 17:27:29,221 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 104 flow [2022-12-13 17:27:29,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 17:27:29,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:29,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:29,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:27:29,222 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:29,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2032145650, now seen corresponding path program 1 times [2022-12-13 17:27:29,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:29,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31228284] [2022-12-13 17:27:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:29,289 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 17:27:29,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31228284] [2022-12-13 17:27:29,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31228284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847028270] [2022-12-13 17:27:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:29,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:29,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:29,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:27:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:27:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:29,401 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 17:27:29,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:29,424 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 17:27:29,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847028270] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:29,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:29,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 17:27:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452950808] [2022-12-13 17:27:29,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:29,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:27:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:27:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:27:29,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:29,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 207.875) internal successors, (1663), 8 states have internal predecessors, (1663), 0 states have call successors, (0), 0 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 17:27:29,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:29,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:29,568 INFO L130 PetriNetUnfolder]: 93/168 cut-off events. [2022-12-13 17:27:29,568 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-13 17:27:29,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 168 events. 93/168 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 504 event pairs, 12 based on Foata normal form. 6/160 useless extension candidates. Maximal degree in co-relation 520. Up to 71 conditions per place. [2022-12-13 17:27:29,570 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 41 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2022-12-13 17:27:29,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 291 flow [2022-12-13 17:27:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2022-12-13 17:27:29,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43917525773195876 [2022-12-13 17:27:29,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2022-12-13 17:27:29,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2022-12-13 17:27:29,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:29,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2022-12-13 17:27:29,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 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 17:27:29,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:29,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:29,576 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 104 flow. Second operand 5 states and 1065 transitions. [2022-12-13 17:27:29,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 291 flow [2022-12-13 17:27:29,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 275 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:29,578 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 136 flow [2022-12-13 17:27:29,578 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2022-12-13 17:27:29,578 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-12-13 17:27:29,578 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 136 flow [2022-12-13 17:27:29,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 207.875) internal successors, (1663), 8 states have internal predecessors, (1663), 0 states have call successors, (0), 0 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 17:27:29,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:29,579 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:29,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:29,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:29,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash 743665405, now seen corresponding path program 1 times [2022-12-13 17:27:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202473763] [2022-12-13 17:27:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202473763] [2022-12-13 17:27:29,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202473763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:29,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:29,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:27:29,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576274335] [2022-12-13 17:27:29,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:29,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:29,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:29,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:29,939 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 485 [2022-12-13 17:27:29,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 17:27:29,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:29,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 485 [2022-12-13 17:27:29,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:30,022 INFO L130 PetriNetUnfolder]: 114/211 cut-off events. [2022-12-13 17:27:30,022 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2022-12-13 17:27:30,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 211 events. 114/211 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 668 event pairs, 38 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 744. Up to 134 conditions per place. [2022-12-13 17:27:30,025 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 33 selfloop transitions, 11 changer transitions 6/50 dead transitions. [2022-12-13 17:27:30,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 359 flow [2022-12-13 17:27:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:27:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:27:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1277 transitions. [2022-12-13 17:27:30,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4388316151202749 [2022-12-13 17:27:30,027 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1277 transitions. [2022-12-13 17:27:30,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1277 transitions. [2022-12-13 17:27:30,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:30,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1277 transitions. [2022-12-13 17:27:30,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 212.83333333333334) internal successors, (1277), 6 states have internal predecessors, (1277), 0 states have call successors, (0), 0 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 17:27:30,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 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 17:27:30,033 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 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 17:27:30,033 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 136 flow. Second operand 6 states and 1277 transitions. [2022-12-13 17:27:30,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 359 flow [2022-12-13 17:27:30,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 17:27:30,036 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2022-12-13 17:27:30,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2022-12-13 17:27:30,037 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-12-13 17:27:30,037 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2022-12-13 17:27:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 17:27:30,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:30,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:30,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:27:30,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash -242137613, now seen corresponding path program 2 times [2022-12-13 17:27:30,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:30,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724540894] [2022-12-13 17:27:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:30,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:30,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:30,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724540894] [2022-12-13 17:27:30,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724540894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:30,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:30,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:27:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296917769] [2022-12-13 17:27:30,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:30,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:30,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:30,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:30,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 485 [2022-12-13 17:27:30,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 0 states have call successors, (0), 0 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 17:27:30,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:30,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 485 [2022-12-13 17:27:30,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:30,193 INFO L130 PetriNetUnfolder]: 109/204 cut-off events. [2022-12-13 17:27:30,193 INFO L131 PetriNetUnfolder]: For 523/523 co-relation queries the response was YES. [2022-12-13 17:27:30,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 204 events. 109/204 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 659 event pairs, 40 based on Foata normal form. 4/208 useless extension candidates. Maximal degree in co-relation 848. Up to 130 conditions per place. [2022-12-13 17:27:30,196 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 36 selfloop transitions, 8 changer transitions 7/51 dead transitions. [2022-12-13 17:27:30,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 421 flow [2022-12-13 17:27:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1072 transitions. [2022-12-13 17:27:30,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4420618556701031 [2022-12-13 17:27:30,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1072 transitions. [2022-12-13 17:27:30,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1072 transitions. [2022-12-13 17:27:30,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:30,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1072 transitions. [2022-12-13 17:27:30,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.4) internal successors, (1072), 5 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 17:27:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:30,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:30,205 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 5 states and 1072 transitions. [2022-12-13 17:27:30,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 421 flow [2022-12-13 17:27:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 385 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:30,209 INFO L231 Difference]: Finished difference. Result has 49 places, 30 transitions, 229 flow [2022-12-13 17:27:30,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=49, PETRI_TRANSITIONS=30} [2022-12-13 17:27:30,210 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2022-12-13 17:27:30,210 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 30 transitions, 229 flow [2022-12-13 17:27:30,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 0 states have call successors, (0), 0 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 17:27:30,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:30,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:30,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:27:30,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1532927973, now seen corresponding path program 3 times [2022-12-13 17:27:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:30,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449829576] [2022-12-13 17:27:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:30,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449829576] [2022-12-13 17:27:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449829576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:30,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:30,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:27:30,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656181820] [2022-12-13 17:27:30,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:30,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:27:30,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:27:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:27:30,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 485 [2022-12-13 17:27:30,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 30 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 17:27:30,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:30,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 485 [2022-12-13 17:27:30,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:30,382 INFO L130 PetriNetUnfolder]: 100/191 cut-off events. [2022-12-13 17:27:30,382 INFO L131 PetriNetUnfolder]: For 587/587 co-relation queries the response was YES. [2022-12-13 17:27:30,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 191 events. 100/191 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 603 event pairs, 36 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 794. Up to 128 conditions per place. [2022-12-13 17:27:30,383 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 31 selfloop transitions, 8 changer transitions 7/46 dead transitions. [2022-12-13 17:27:30,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 393 flow [2022-12-13 17:27:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1067 transitions. [2022-12-13 17:27:30,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44 [2022-12-13 17:27:30,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1067 transitions. [2022-12-13 17:27:30,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1067 transitions. [2022-12-13 17:27:30,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:30,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1067 transitions. [2022-12-13 17:27:30,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.4) internal successors, (1067), 5 states have internal predecessors, (1067), 0 states have call successors, (0), 0 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 17:27:30,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:30,390 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:30,390 INFO L175 Difference]: Start difference. First operand has 49 places, 30 transitions, 229 flow. Second operand 5 states and 1067 transitions. [2022-12-13 17:27:30,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 393 flow [2022-12-13 17:27:30,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 375 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:30,393 INFO L231 Difference]: Finished difference. Result has 52 places, 29 transitions, 223 flow [2022-12-13 17:27:30,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=52, PETRI_TRANSITIONS=29} [2022-12-13 17:27:30,393 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2022-12-13 17:27:30,393 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 29 transitions, 223 flow [2022-12-13 17:27:30,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 17:27:30,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:30,394 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:30,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:27:30,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:30,395 INFO L85 PathProgramCache]: Analyzing trace with hash 33932136, now seen corresponding path program 2 times [2022-12-13 17:27:30,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:30,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811184252] [2022-12-13 17:27:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:30,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:30,449 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 17:27:30,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:30,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811184252] [2022-12-13 17:27:30,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811184252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:30,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093104026] [2022-12-13 17:27:30,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:27:30,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:30,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:30,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:27:30,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:27:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:30,550 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 17:27:30,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:30,570 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 17:27:30,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093104026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:30,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:30,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947996969] [2022-12-13 17:27:30,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:30,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:27:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:27:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:27:30,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:30,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 29 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 207.5) internal successors, (2075), 10 states have internal predecessors, (2075), 0 states have call successors, (0), 0 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 17:27:30,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:30,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:30,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:30,757 INFO L130 PetriNetUnfolder]: 110/199 cut-off events. [2022-12-13 17:27:30,757 INFO L131 PetriNetUnfolder]: For 532/532 co-relation queries the response was YES. [2022-12-13 17:27:30,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 199 events. 110/199 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 601 event pairs, 15 based on Foata normal form. 6/205 useless extension candidates. Maximal degree in co-relation 807. Up to 104 conditions per place. [2022-12-13 17:27:30,759 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 48 selfloop transitions, 13 changer transitions 0/61 dead transitions. [2022-12-13 17:27:30,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 464 flow [2022-12-13 17:27:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:27:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:27:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1695 transitions. [2022-12-13 17:27:30,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368556701030928 [2022-12-13 17:27:30,764 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1695 transitions. [2022-12-13 17:27:30,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1695 transitions. [2022-12-13 17:27:30,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:30,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1695 transitions. [2022-12-13 17:27:30,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 211.875) internal successors, (1695), 8 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 17:27:30,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:27:30,776 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:27:30,776 INFO L175 Difference]: Start difference. First operand has 52 places, 29 transitions, 223 flow. Second operand 8 states and 1695 transitions. [2022-12-13 17:27:30,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 464 flow [2022-12-13 17:27:30,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 440 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 17:27:30,779 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 254 flow [2022-12-13 17:27:30,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2022-12-13 17:27:30,780 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2022-12-13 17:27:30,780 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 254 flow [2022-12-13 17:27:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.5) internal successors, (2075), 10 states have internal predecessors, (2075), 0 states have call successors, (0), 0 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 17:27:30,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:30,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:30,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:27:30,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:30,982 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash 290793409, now seen corresponding path program 4 times [2022-12-13 17:27:30,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:30,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790780262] [2022-12-13 17:27:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:30,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:31,051 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 17:27:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790780262] [2022-12-13 17:27:31,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790780262] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520945025] [2022-12-13 17:27:31,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:27:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:31,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:31,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:31,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:27:31,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:27:31,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:31,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:27:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:31,135 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 17:27:31,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:31,153 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 17:27:31,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520945025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:31,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:31,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 17:27:31,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618645254] [2022-12-13 17:27:31,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:31,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:27:31,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:27:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:27:31,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:31,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 254 flow. Second operand has 8 states, 8 states have (on average 207.625) internal successors, (1661), 8 states have internal predecessors, (1661), 0 states have call successors, (0), 0 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 17:27:31,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:31,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:31,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:31,295 INFO L130 PetriNetUnfolder]: 116/209 cut-off events. [2022-12-13 17:27:31,295 INFO L131 PetriNetUnfolder]: For 593/593 co-relation queries the response was YES. [2022-12-13 17:27:31,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 209 events. 116/209 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 617 event pairs, 17 based on Foata normal form. 4/213 useless extension candidates. Maximal degree in co-relation 920. Up to 100 conditions per place. [2022-12-13 17:27:31,298 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2022-12-13 17:27:31,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 435 flow [2022-12-13 17:27:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1061 transitions. [2022-12-13 17:27:31,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43752577319587627 [2022-12-13 17:27:31,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1061 transitions. [2022-12-13 17:27:31,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1061 transitions. [2022-12-13 17:27:31,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:31,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1061 transitions. [2022-12-13 17:27:31,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.2) internal successors, (1061), 5 states have internal predecessors, (1061), 0 states have call successors, (0), 0 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 17:27:31,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:31,304 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:31,304 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 254 flow. Second operand 5 states and 1061 transitions. [2022-12-13 17:27:31,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 435 flow [2022-12-13 17:27:31,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 402 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 17:27:31,307 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 284 flow [2022-12-13 17:27:31,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2022-12-13 17:27:31,308 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2022-12-13 17:27:31,308 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 284 flow [2022-12-13 17:27:31,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 207.625) internal successors, (1661), 8 states have internal predecessors, (1661), 0 states have call successors, (0), 0 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 17:27:31,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:31,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:31,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:27:31,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:27:31,510 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash 151021219, now seen corresponding path program 5 times [2022-12-13 17:27:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:31,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401869328] [2022-12-13 17:27:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:31,567 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 17:27:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401869328] [2022-12-13 17:27:31,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401869328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207127417] [2022-12-13 17:27:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:27:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:31,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:31,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:27:31,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:27:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:31,655 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 17:27:31,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:31,672 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 17:27:31,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207127417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:31,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:31,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473006714] [2022-12-13 17:27:31,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:27:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:27:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:27:31,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:31,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 207.6) internal successors, (2076), 10 states have internal predecessors, (2076), 0 states have call successors, (0), 0 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 17:27:31,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:31,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:31,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:31,823 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2022-12-13 17:27:31,823 INFO L131 PetriNetUnfolder]: For 729/729 co-relation queries the response was YES. [2022-12-13 17:27:31,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 219 events. 122/219 cut-off events. For 729/729 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 672 event pairs, 43 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 974. Up to 161 conditions per place. [2022-12-13 17:27:31,826 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2022-12-13 17:27:31,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 436 flow [2022-12-13 17:27:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1060 transitions. [2022-12-13 17:27:31,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43711340206185567 [2022-12-13 17:27:31,828 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1060 transitions. [2022-12-13 17:27:31,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1060 transitions. [2022-12-13 17:27:31,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:31,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1060 transitions. [2022-12-13 17:27:31,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 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 17:27:31,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:31,832 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:31,832 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 284 flow. Second operand 5 states and 1060 transitions. [2022-12-13 17:27:31,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 436 flow [2022-12-13 17:27:31,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 421 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:31,835 INFO L231 Difference]: Finished difference. Result has 58 places, 35 transitions, 306 flow [2022-12-13 17:27:31,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=58, PETRI_TRANSITIONS=35} [2022-12-13 17:27:31,835 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-12-13 17:27:31,835 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 35 transitions, 306 flow [2022-12-13 17:27:31,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.6) internal successors, (2076), 10 states have internal predecessors, (2076), 0 states have call successors, (0), 0 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 17:27:31,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:31,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:31,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:27:32,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 17:27:32,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1938465692, now seen corresponding path program 3 times [2022-12-13 17:27:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:32,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139270649] [2022-12-13 17:27:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:32,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:32,112 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 17:27:32,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139270649] [2022-12-13 17:27:32,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139270649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639431388] [2022-12-13 17:27:32,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:27:32,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:32,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:32,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:32,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:27:32,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:27:32,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:27:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:32,213 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 17:27:32,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:32,230 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 17:27:32,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639431388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:32,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:32,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072545343] [2022-12-13 17:27:32,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:27:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:27:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:27:32,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:32,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 35 transitions, 306 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 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 17:27:32,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:32,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:32,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:32,381 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2022-12-13 17:27:32,382 INFO L131 PetriNetUnfolder]: For 728/728 co-relation queries the response was YES. [2022-12-13 17:27:32,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 203 events. 114/203 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 591 event pairs, 37 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 930. Up to 153 conditions per place. [2022-12-13 17:27:32,385 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2022-12-13 17:27:32,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 45 transitions, 429 flow [2022-12-13 17:27:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1057 transitions. [2022-12-13 17:27:32,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43587628865979383 [2022-12-13 17:27:32,389 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1057 transitions. [2022-12-13 17:27:32,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1057 transitions. [2022-12-13 17:27:32,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:32,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1057 transitions. [2022-12-13 17:27:32,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 17:27:32,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:32,398 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 485.0) internal successors, (2910), 6 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 17:27:32,398 INFO L175 Difference]: Start difference. First operand has 58 places, 35 transitions, 306 flow. Second operand 5 states and 1057 transitions. [2022-12-13 17:27:32,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 45 transitions, 429 flow [2022-12-13 17:27:32,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 45 transitions, 403 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 17:27:32,402 INFO L231 Difference]: Finished difference. Result has 58 places, 34 transitions, 293 flow [2022-12-13 17:27:32,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=58, PETRI_TRANSITIONS=34} [2022-12-13 17:27:32,403 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-12-13 17:27:32,403 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 34 transitions, 293 flow [2022-12-13 17:27:32,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 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 17:27:32,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:32,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:32,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:27:32,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:27:32,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash 333715069, now seen corresponding path program 6 times [2022-12-13 17:27:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048195263] [2022-12-13 17:27:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:32,746 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 17:27:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048195263] [2022-12-13 17:27:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048195263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909957689] [2022-12-13 17:27:32,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:27:32,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:32,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:32,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:32,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:27:32,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 17:27:32,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:32,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:27:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:32,847 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 17:27:32,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:32,865 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 17:27:32,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909957689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:32,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:32,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732418018] [2022-12-13 17:27:32,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:32,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:27:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:27:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:27:32,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:32,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 34 transitions, 293 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 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 17:27:32,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:32,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:32,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:33,037 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2022-12-13 17:27:33,037 INFO L131 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2022-12-13 17:27:33,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 193 events. 110/193 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 570 event pairs, 9 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 904. Up to 86 conditions per place. [2022-12-13 17:27:33,039 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2022-12-13 17:27:33,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 487 flow [2022-12-13 17:27:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:27:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:27:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1684 transitions. [2022-12-13 17:27:33,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43402061855670104 [2022-12-13 17:27:33,043 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1684 transitions. [2022-12-13 17:27:33,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1684 transitions. [2022-12-13 17:27:33,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:33,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1684 transitions. [2022-12-13 17:27:33,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 210.5) internal successors, (1684), 8 states have internal predecessors, (1684), 0 states have call successors, (0), 0 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 17:27:33,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:27:33,052 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:27:33,052 INFO L175 Difference]: Start difference. First operand has 58 places, 34 transitions, 293 flow. Second operand 8 states and 1684 transitions. [2022-12-13 17:27:33,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 487 flow [2022-12-13 17:27:33,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 440 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-12-13 17:27:33,056 INFO L231 Difference]: Finished difference. Result has 58 places, 35 transitions, 291 flow [2022-12-13 17:27:33,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=291, PETRI_PLACES=58, PETRI_TRANSITIONS=35} [2022-12-13 17:27:33,057 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-12-13 17:27:33,057 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 35 transitions, 291 flow [2022-12-13 17:27:33,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 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 17:27:33,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:33,058 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:33,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:27:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:27:33,258 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1110073076, now seen corresponding path program 1 times [2022-12-13 17:27:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:33,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741346717] [2022-12-13 17:27:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:33,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:33,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741346717] [2022-12-13 17:27:33,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741346717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165637112] [2022-12-13 17:27:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:33,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:33,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:33,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:33,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:27:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:27:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:33,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165637112] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:33,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208090876] [2022-12-13 17:27:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:33,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:33,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:27:33,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 35 transitions, 291 flow. Second operand has 12 states, 12 states have (on average 199.5) internal successors, (2394), 12 states have internal predecessors, (2394), 0 states have call successors, (0), 0 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 17:27:33,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:33,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:27:33,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:34,131 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2022-12-13 17:27:34,131 INFO L131 PetriNetUnfolder]: For 620/640 co-relation queries the response was YES. [2022-12-13 17:27:34,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 238 events. 132/238 cut-off events. For 620/640 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 812 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1058. Up to 167 conditions per place. [2022-12-13 17:27:34,134 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2022-12-13 17:27:34,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 533 flow [2022-12-13 17:27:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1419 transitions. [2022-12-13 17:27:34,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179675994108984 [2022-12-13 17:27:34,136 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1419 transitions. [2022-12-13 17:27:34,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1419 transitions. [2022-12-13 17:27:34,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:34,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1419 transitions. [2022-12-13 17:27:34,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.71428571428572) internal successors, (1419), 7 states have internal predecessors, (1419), 0 states have call successors, (0), 0 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 17:27:34,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:34,141 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:34,141 INFO L175 Difference]: Start difference. First operand has 58 places, 35 transitions, 291 flow. Second operand 7 states and 1419 transitions. [2022-12-13 17:27:34,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 533 flow [2022-12-13 17:27:34,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 482 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 17:27:34,143 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 382 flow [2022-12-13 17:27:34,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-12-13 17:27:34,144 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2022-12-13 17:27:34,144 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 382 flow [2022-12-13 17:27:34,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.5) internal successors, (2394), 12 states have internal predecessors, (2394), 0 states have call successors, (0), 0 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 17:27:34,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:34,144 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:34,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:27:34,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:27:34,345 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:34,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1820222814, now seen corresponding path program 2 times [2022-12-13 17:27:34,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:34,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495579133] [2022-12-13 17:27:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:34,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:34,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495579133] [2022-12-13 17:27:34,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495579133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:34,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664807673] [2022-12-13 17:27:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:27:34,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:34,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:34,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:34,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:27:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:27:34,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:34,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664807673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:34,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:34,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 17:27:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772501100] [2022-12-13 17:27:34,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:34,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:27:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:34,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:27:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:27:35,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:27:35,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 199.42857142857142) internal successors, (2792), 14 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 17:27:35,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:35,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:27:35,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:35,344 INFO L130 PetriNetUnfolder]: 145/265 cut-off events. [2022-12-13 17:27:35,344 INFO L131 PetriNetUnfolder]: For 886/916 co-relation queries the response was YES. [2022-12-13 17:27:35,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 265 events. 145/265 cut-off events. For 886/916 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 941 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1250. Up to 172 conditions per place. [2022-12-13 17:27:35,346 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2022-12-13 17:27:35,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 616 flow [2022-12-13 17:27:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1424 transitions. [2022-12-13 17:27:35,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.419440353460972 [2022-12-13 17:27:35,348 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1424 transitions. [2022-12-13 17:27:35,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1424 transitions. [2022-12-13 17:27:35,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:35,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1424 transitions. [2022-12-13 17:27:35,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 203.42857142857142) internal successors, (1424), 7 states have internal predecessors, (1424), 0 states have call successors, (0), 0 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 17:27:35,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:35,352 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:35,353 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 382 flow. Second operand 7 states and 1424 transitions. [2022-12-13 17:27:35,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 616 flow [2022-12-13 17:27:35,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 583 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:35,356 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 451 flow [2022-12-13 17:27:35,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2022-12-13 17:27:35,356 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2022-12-13 17:27:35,356 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 451 flow [2022-12-13 17:27:35,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 199.42857142857142) internal successors, (2792), 14 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 17:27:35,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:35,357 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:35,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:27:35,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:27:35,557 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1792517184, now seen corresponding path program 3 times [2022-12-13 17:27:35,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:35,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390120639] [2022-12-13 17:27:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390120639] [2022-12-13 17:27:35,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390120639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280056006] [2022-12-13 17:27:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:27:35,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:35,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:35,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:35,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:27:35,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:27:35,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:35,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:27:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:35,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:36,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280056006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:36,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:36,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 17:27:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320364490] [2022-12-13 17:27:36,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:36,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:36,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:27:36,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 451 flow. Second operand has 13 states, 13 states have (on average 199.53846153846155) internal successors, (2594), 13 states have internal predecessors, (2594), 0 states have call successors, (0), 0 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 17:27:36,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:36,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:27:36,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:36,386 INFO L130 PetriNetUnfolder]: 141/255 cut-off events. [2022-12-13 17:27:36,386 INFO L131 PetriNetUnfolder]: For 1241/1267 co-relation queries the response was YES. [2022-12-13 17:27:36,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 255 events. 141/255 cut-off events. For 1241/1267 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 897 event pairs, 8 based on Foata normal form. 9/256 useless extension candidates. Maximal degree in co-relation 1295. Up to 171 conditions per place. [2022-12-13 17:27:36,389 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2022-12-13 17:27:36,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 648 flow [2022-12-13 17:27:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1420 transitions. [2022-12-13 17:27:36,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182621502209131 [2022-12-13 17:27:36,391 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1420 transitions. [2022-12-13 17:27:36,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1420 transitions. [2022-12-13 17:27:36,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:36,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1420 transitions. [2022-12-13 17:27:36,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.85714285714286) internal successors, (1420), 7 states have internal predecessors, (1420), 0 states have call successors, (0), 0 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 17:27:36,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:36,395 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:36,396 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 451 flow. Second operand 7 states and 1420 transitions. [2022-12-13 17:27:36,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 648 flow [2022-12-13 17:27:36,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 579 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-12-13 17:27:36,401 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 472 flow [2022-12-13 17:27:36,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2022-12-13 17:27:36,402 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2022-12-13 17:27:36,402 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 472 flow [2022-12-13 17:27:36,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.53846153846155) internal successors, (2594), 13 states have internal predecessors, (2594), 0 states have call successors, (0), 0 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 17:27:36,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:36,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:36,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:27:36,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:36,603 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1965040546, now seen corresponding path program 4 times [2022-12-13 17:27:36,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:36,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444653597] [2022-12-13 17:27:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:36,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444653597] [2022-12-13 17:27:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444653597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994565384] [2022-12-13 17:27:36,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:27:36,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:36,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:36,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:36,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:27:36,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:27:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:27:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:37,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994565384] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:37,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:37,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:37,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633613445] [2022-12-13 17:27:37,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:37,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:37,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:37,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:37,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:27:37,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 472 flow. Second operand has 12 states, 12 states have (on average 199.66666666666666) internal successors, (2396), 12 states have internal predecessors, (2396), 0 states have call successors, (0), 0 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 17:27:37,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:37,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:27:37,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:37,476 INFO L130 PetriNetUnfolder]: 165/297 cut-off events. [2022-12-13 17:27:37,476 INFO L131 PetriNetUnfolder]: For 1460/1486 co-relation queries the response was YES. [2022-12-13 17:27:37,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 297 events. 165/297 cut-off events. For 1460/1486 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1104 event pairs, 10 based on Foata normal form. 9/298 useless extension candidates. Maximal degree in co-relation 1531. Up to 244 conditions per place. [2022-12-13 17:27:37,480 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2022-12-13 17:27:37,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 726 flow [2022-12-13 17:27:37,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1411 transitions. [2022-12-13 17:27:37,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4156111929307806 [2022-12-13 17:27:37,483 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1411 transitions. [2022-12-13 17:27:37,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1411 transitions. [2022-12-13 17:27:37,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:37,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1411 transitions. [2022-12-13 17:27:37,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 17:27:37,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:37,490 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:37,490 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 472 flow. Second operand 7 states and 1411 transitions. [2022-12-13 17:27:37,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 726 flow [2022-12-13 17:27:37,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 679 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-13 17:27:37,497 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 579 flow [2022-12-13 17:27:37,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2022-12-13 17:27:37,498 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2022-12-13 17:27:37,498 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 579 flow [2022-12-13 17:27:37,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.66666666666666) internal successors, (2396), 12 states have internal predecessors, (2396), 0 states have call successors, (0), 0 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 17:27:37,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:37,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:37,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:27:37,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-13 17:27:37,699 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 340017796, now seen corresponding path program 5 times [2022-12-13 17:27:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526329042] [2022-12-13 17:27:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:37,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526329042] [2022-12-13 17:27:37,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526329042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:37,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34280608] [2022-12-13 17:27:37,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:27:37,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:37,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:37,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:37,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:27:37,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:27:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:27:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:38,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:38,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34280608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:38,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:38,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 17:27:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884999128] [2022-12-13 17:27:38,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:38,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:27:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:27:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:27:38,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:27:38,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 579 flow. Second operand has 14 states, 14 states have (on average 199.42857142857142) internal successors, (2792), 14 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 17:27:38,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:38,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:27:38,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:38,503 INFO L130 PetriNetUnfolder]: 179/325 cut-off events. [2022-12-13 17:27:38,503 INFO L131 PetriNetUnfolder]: For 1819/1845 co-relation queries the response was YES. [2022-12-13 17:27:38,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1778 conditions, 325 events. 179/325 cut-off events. For 1819/1845 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1252 event pairs, 14 based on Foata normal form. 9/326 useless extension candidates. Maximal degree in co-relation 1748. Up to 248 conditions per place. [2022-12-13 17:27:38,506 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2022-12-13 17:27:38,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 838 flow [2022-12-13 17:27:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1418 transitions. [2022-12-13 17:27:38,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41767304860088367 [2022-12-13 17:27:38,507 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1418 transitions. [2022-12-13 17:27:38,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1418 transitions. [2022-12-13 17:27:38,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:38,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1418 transitions. [2022-12-13 17:27:38,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.57142857142858) internal successors, (1418), 7 states have internal predecessors, (1418), 0 states have call successors, (0), 0 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 17:27:38,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:38,511 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:38,511 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 579 flow. Second operand 7 states and 1418 transitions. [2022-12-13 17:27:38,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 838 flow [2022-12-13 17:27:38,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 801 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:38,516 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 656 flow [2022-12-13 17:27:38,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=656, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2022-12-13 17:27:38,516 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2022-12-13 17:27:38,516 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 656 flow [2022-12-13 17:27:38,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 199.42857142857142) internal successors, (2792), 14 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 17:27:38,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:38,517 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:38,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:27:38,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:38,718 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1095462388, now seen corresponding path program 6 times [2022-12-13 17:27:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:38,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504130983] [2022-12-13 17:27:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:38,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504130983] [2022-12-13 17:27:38,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504130983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981703968] [2022-12-13 17:27:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:27:38,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:38,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:38,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:27:38,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 17:27:38,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:27:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:39,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:39,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981703968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:39,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:39,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 17:27:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572626520] [2022-12-13 17:27:39,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:39,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:27:39,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 656 flow. Second operand has 12 states, 12 states have (on average 199.66666666666666) internal successors, (2396), 12 states have internal predecessors, (2396), 0 states have call successors, (0), 0 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 17:27:39,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:39,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:27:39,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:39,451 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2022-12-13 17:27:39,451 INFO L131 PetriNetUnfolder]: For 2150/2176 co-relation queries the response was YES. [2022-12-13 17:27:39,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 317 events. 177/317 cut-off events. For 2150/2176 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1213 event pairs, 14 based on Foata normal form. 9/318 useless extension candidates. Maximal degree in co-relation 1781. Up to 248 conditions per place. [2022-12-13 17:27:39,453 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2022-12-13 17:27:39,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 879 flow [2022-12-13 17:27:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1416 transitions. [2022-12-13 17:27:39,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4170839469808542 [2022-12-13 17:27:39,455 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1416 transitions. [2022-12-13 17:27:39,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1416 transitions. [2022-12-13 17:27:39,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:39,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1416 transitions. [2022-12-13 17:27:39,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.28571428571428) internal successors, (1416), 7 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 17:27:39,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:39,458 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:39,458 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 656 flow. Second operand 7 states and 1416 transitions. [2022-12-13 17:27:39,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 879 flow [2022-12-13 17:27:39,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 801 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-12-13 17:27:39,463 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 678 flow [2022-12-13 17:27:39,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=678, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2022-12-13 17:27:39,463 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2022-12-13 17:27:39,463 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 678 flow [2022-12-13 17:27:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 199.66666666666666) internal successors, (2396), 12 states have internal predecessors, (2396), 0 states have call successors, (0), 0 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 17:27:39,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:39,464 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:39,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:27:39,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:39,665 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:39,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1940371163, now seen corresponding path program 7 times [2022-12-13 17:27:39,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:39,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014711803] [2022-12-13 17:27:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:39,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:39,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014711803] [2022-12-13 17:27:39,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014711803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:39,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065387917] [2022-12-13 17:27:39,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:27:39,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:39,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:39,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:39,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:27:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:39,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:39,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065387917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:39,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:39,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 17:27:39,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628403725] [2022-12-13 17:27:39,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:39,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:27:39,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:27:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:27:39,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:39,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 678 flow. Second operand has 11 states, 11 states have (on average 207.45454545454547) internal successors, (2282), 11 states have internal predecessors, (2282), 0 states have call successors, (0), 0 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 17:27:39,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:39,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:40,067 INFO L130 PetriNetUnfolder]: 228/403 cut-off events. [2022-12-13 17:27:40,067 INFO L131 PetriNetUnfolder]: For 2353/2353 co-relation queries the response was YES. [2022-12-13 17:27:40,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 403 events. 228/403 cut-off events. For 2353/2353 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1567 event pairs, 23 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2217. Up to 154 conditions per place. [2022-12-13 17:27:40,069 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 75 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2022-12-13 17:27:40,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 103 transitions, 1145 flow [2022-12-13 17:27:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1488 transitions. [2022-12-13 17:27:40,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382916053019146 [2022-12-13 17:27:40,071 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1488 transitions. [2022-12-13 17:27:40,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1488 transitions. [2022-12-13 17:27:40,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:40,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1488 transitions. [2022-12-13 17:27:40,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 212.57142857142858) internal successors, (1488), 7 states have internal predecessors, (1488), 0 states have call successors, (0), 0 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 17:27:40,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:40,074 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:40,074 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 678 flow. Second operand 7 states and 1488 transitions. [2022-12-13 17:27:40,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 103 transitions, 1145 flow [2022-12-13 17:27:40,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 1082 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-12-13 17:27:40,081 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 771 flow [2022-12-13 17:27:40,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=771, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2022-12-13 17:27:40,081 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2022-12-13 17:27:40,081 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 771 flow [2022-12-13 17:27:40,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.45454545454547) internal successors, (2282), 11 states have internal predecessors, (2282), 0 states have call successors, (0), 0 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 17:27:40,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:40,082 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:40,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:27:40,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 17:27:40,282 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash -9354392, now seen corresponding path program 8 times [2022-12-13 17:27:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:40,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061644868] [2022-12-13 17:27:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061644868] [2022-12-13 17:27:40,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061644868] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355405869] [2022-12-13 17:27:40,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:27:40,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:40,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:40,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:27:40,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:40,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355405869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:40,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:40,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 17:27:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885248460] [2022-12-13 17:27:40,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:40,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:27:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:27:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:27:40,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:40,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 771 flow. Second operand has 11 states, 11 states have (on average 207.36363636363637) internal successors, (2281), 11 states have internal predecessors, (2281), 0 states have call successors, (0), 0 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 17:27:40,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:40,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:40,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:40,729 INFO L130 PetriNetUnfolder]: 230/413 cut-off events. [2022-12-13 17:27:40,729 INFO L131 PetriNetUnfolder]: For 3119/3119 co-relation queries the response was YES. [2022-12-13 17:27:40,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 413 events. 230/413 cut-off events. For 3119/3119 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1669 event pairs, 39 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2398. Up to 153 conditions per place. [2022-12-13 17:27:40,733 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 65 selfloop transitions, 43 changer transitions 10/118 dead transitions. [2022-12-13 17:27:40,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 118 transitions, 1341 flow [2022-12-13 17:27:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:27:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:27:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2317 transitions. [2022-12-13 17:27:40,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43430178069353326 [2022-12-13 17:27:40,736 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2317 transitions. [2022-12-13 17:27:40,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2317 transitions. [2022-12-13 17:27:40,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:40,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2317 transitions. [2022-12-13 17:27:40,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 210.63636363636363) internal successors, (2317), 11 states have internal predecessors, (2317), 0 states have call successors, (0), 0 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 17:27:40,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:27:40,743 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:27:40,743 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 771 flow. Second operand 11 states and 2317 transitions. [2022-12-13 17:27:40,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 118 transitions, 1341 flow [2022-12-13 17:27:40,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 118 transitions, 1296 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-12-13 17:27:40,751 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 1026 flow [2022-12-13 17:27:40,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1026, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2022-12-13 17:27:40,751 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2022-12-13 17:27:40,751 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 1026 flow [2022-12-13 17:27:40,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.36363636363637) internal successors, (2281), 11 states have internal predecessors, (2281), 0 states have call successors, (0), 0 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 17:27:40,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:40,752 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:40,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:27:40,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:40,953 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash -236939590, now seen corresponding path program 9 times [2022-12-13 17:27:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936276719] [2022-12-13 17:27:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:40,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:41,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936276719] [2022-12-13 17:27:41,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936276719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:41,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730945993] [2022-12-13 17:27:41,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:27:41,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:41,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:41,042 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:41,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:27:41,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:27:41,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:41,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:41,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:41,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730945993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:41,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:41,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 17:27:41,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206003162] [2022-12-13 17:27:41,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:41,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:41,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:41,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 1026 flow. Second operand has 13 states, 13 states have (on average 207.15384615384616) internal successors, (2693), 13 states have internal predecessors, (2693), 0 states have call successors, (0), 0 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 17:27:41,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:41,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:41,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:41,512 INFO L130 PetriNetUnfolder]: 265/492 cut-off events. [2022-12-13 17:27:41,512 INFO L131 PetriNetUnfolder]: For 4322/4322 co-relation queries the response was YES. [2022-12-13 17:27:41,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 492 events. 265/492 cut-off events. For 4322/4322 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2121 event pairs, 37 based on Foata normal form. 8/500 useless extension candidates. Maximal degree in co-relation 3026. Up to 159 conditions per place. [2022-12-13 17:27:41,515 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 91 selfloop transitions, 64 changer transitions 6/161 dead transitions. [2022-12-13 17:27:41,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 161 transitions, 1914 flow [2022-12-13 17:27:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:27:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:27:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3786 transitions. [2022-12-13 17:27:41,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336769759450172 [2022-12-13 17:27:41,518 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3786 transitions. [2022-12-13 17:27:41,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3786 transitions. [2022-12-13 17:27:41,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:41,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3786 transitions. [2022-12-13 17:27:41,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 210.33333333333334) internal successors, (3786), 18 states have internal predecessors, (3786), 0 states have call successors, (0), 0 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 17:27:41,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 485.0) internal successors, (9215), 19 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:27:41,525 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 485.0) internal successors, (9215), 19 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:27:41,525 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 1026 flow. Second operand 18 states and 3786 transitions. [2022-12-13 17:27:41,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 161 transitions, 1914 flow [2022-12-13 17:27:41,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 161 transitions, 1761 flow, removed 50 selfloop flow, removed 8 redundant places. [2022-12-13 17:27:41,536 INFO L231 Difference]: Finished difference. Result has 117 places, 103 transitions, 1358 flow [2022-12-13 17:27:41,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1358, PETRI_PLACES=117, PETRI_TRANSITIONS=103} [2022-12-13 17:27:41,536 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2022-12-13 17:27:41,536 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 103 transitions, 1358 flow [2022-12-13 17:27:41,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 207.15384615384616) internal successors, (2693), 13 states have internal predecessors, (2693), 0 states have call successors, (0), 0 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 17:27:41,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:41,537 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:41,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 17:27:41,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 17:27:41,738 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 72979043, now seen corresponding path program 10 times [2022-12-13 17:27:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974833715] [2022-12-13 17:27:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:41,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:41,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974833715] [2022-12-13 17:27:41,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974833715] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:41,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224285822] [2022-12-13 17:27:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:27:41,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:41,824 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:41,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:27:41,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:27:41,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:41,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:41,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224285822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:41,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:41,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:27:41,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431305022] [2022-12-13 17:27:41,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:41,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:41,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:41,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:41,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:41,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 103 transitions, 1358 flow. Second operand has 12 states, 12 states have (on average 207.33333333333334) internal successors, (2488), 12 states have internal predecessors, (2488), 0 states have call successors, (0), 0 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 17:27:41,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:41,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:41,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:42,320 INFO L130 PetriNetUnfolder]: 316/591 cut-off events. [2022-12-13 17:27:42,320 INFO L131 PetriNetUnfolder]: For 6082/6082 co-relation queries the response was YES. [2022-12-13 17:27:42,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3868 conditions, 591 events. 316/591 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2640 event pairs, 17 based on Foata normal form. 18/609 useless extension candidates. Maximal degree in co-relation 3824. Up to 303 conditions per place. [2022-12-13 17:27:42,324 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 119 selfloop transitions, 50 changer transitions 0/169 dead transitions. [2022-12-13 17:27:42,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 169 transitions, 2235 flow [2022-12-13 17:27:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:27:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:27:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2963 transitions. [2022-12-13 17:27:42,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43637702503681886 [2022-12-13 17:27:42,327 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2963 transitions. [2022-12-13 17:27:42,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2963 transitions. [2022-12-13 17:27:42,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:42,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2963 transitions. [2022-12-13 17:27:42,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 211.64285714285714) internal successors, (2963), 14 states have internal predecessors, (2963), 0 states have call successors, (0), 0 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 17:27:42,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:27:42,333 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:27:42,333 INFO L175 Difference]: Start difference. First operand has 117 places, 103 transitions, 1358 flow. Second operand 14 states and 2963 transitions. [2022-12-13 17:27:42,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 169 transitions, 2235 flow [2022-12-13 17:27:42,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 169 transitions, 2073 flow, removed 30 selfloop flow, removed 8 redundant places. [2022-12-13 17:27:42,350 INFO L231 Difference]: Finished difference. Result has 126 places, 117 transitions, 1580 flow [2022-12-13 17:27:42,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1580, PETRI_PLACES=126, PETRI_TRANSITIONS=117} [2022-12-13 17:27:42,351 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2022-12-13 17:27:42,351 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 1580 flow [2022-12-13 17:27:42,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.33333333333334) internal successors, (2488), 12 states have internal predecessors, (2488), 0 states have call successors, (0), 0 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 17:27:42,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:42,351 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:42,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 17:27:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 17:27:42,552 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1780688428, now seen corresponding path program 11 times [2022-12-13 17:27:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696773352] [2022-12-13 17:27:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:42,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696773352] [2022-12-13 17:27:42,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696773352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986760048] [2022-12-13 17:27:42,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:27:42,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:42,617 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 17:27:42,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:27:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:42,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:42,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986760048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:42,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:42,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:27:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607458397] [2022-12-13 17:27:42,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:42,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:42,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:42,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:42,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 117 transitions, 1580 flow. Second operand has 12 states, 12 states have (on average 207.08333333333334) internal successors, (2485), 12 states have internal predecessors, (2485), 0 states have call successors, (0), 0 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 17:27:42,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:42,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:42,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:43,041 INFO L130 PetriNetUnfolder]: 391/758 cut-off events. [2022-12-13 17:27:43,041 INFO L131 PetriNetUnfolder]: For 9697/9697 co-relation queries the response was YES. [2022-12-13 17:27:43,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5418 conditions, 758 events. 391/758 cut-off events. For 9697/9697 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3741 event pairs, 81 based on Foata normal form. 8/766 useless extension candidates. Maximal degree in co-relation 5370. Up to 329 conditions per place. [2022-12-13 17:27:43,046 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 116 selfloop transitions, 62 changer transitions 0/178 dead transitions. [2022-12-13 17:27:43,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 178 transitions, 2495 flow [2022-12-13 17:27:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:27:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:27:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2756 transitions. [2022-12-13 17:27:43,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43711340206185567 [2022-12-13 17:27:43,049 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2756 transitions. [2022-12-13 17:27:43,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2756 transitions. [2022-12-13 17:27:43,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:43,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2756 transitions. [2022-12-13 17:27:43,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 212.0) internal successors, (2756), 13 states have internal predecessors, (2756), 0 states have call successors, (0), 0 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 17:27:43,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 485.0) internal successors, (6790), 14 states have internal predecessors, (6790), 0 states have call successors, (0), 0 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 17:27:43,054 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 485.0) internal successors, (6790), 14 states have internal predecessors, (6790), 0 states have call successors, (0), 0 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 17:27:43,054 INFO L175 Difference]: Start difference. First operand has 126 places, 117 transitions, 1580 flow. Second operand 13 states and 2756 transitions. [2022-12-13 17:27:43,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 178 transitions, 2495 flow [2022-12-13 17:27:43,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 2273 flow, removed 91 selfloop flow, removed 5 redundant places. [2022-12-13 17:27:43,075 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 1851 flow [2022-12-13 17:27:43,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1851, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-12-13 17:27:43,076 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2022-12-13 17:27:43,076 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 1851 flow [2022-12-13 17:27:43,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.08333333333334) internal successors, (2485), 12 states have internal predecessors, (2485), 0 states have call successors, (0), 0 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 17:27:43,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:43,076 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:43,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:43,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 17:27:43,277 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 721345983, now seen corresponding path program 12 times [2022-12-13 17:27:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:43,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470527556] [2022-12-13 17:27:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:43,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470527556] [2022-12-13 17:27:43,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470527556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555032641] [2022-12-13 17:27:43,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:27:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:43,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:27:43,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:27:43,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:43,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:43,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555032641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:43,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:43,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:27:43,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137428695] [2022-12-13 17:27:43,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:43,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:43,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:43,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:43,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 131 transitions, 1851 flow. Second operand has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:27:43,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:43,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:43,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:43,854 INFO L130 PetriNetUnfolder]: 401/774 cut-off events. [2022-12-13 17:27:43,854 INFO L131 PetriNetUnfolder]: For 10149/10149 co-relation queries the response was YES. [2022-12-13 17:27:43,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5379 conditions, 774 events. 401/774 cut-off events. For 10149/10149 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3878 event pairs, 11 based on Foata normal form. 6/776 useless extension candidates. Maximal degree in co-relation 5324. Up to 209 conditions per place. [2022-12-13 17:27:43,860 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 117 selfloop transitions, 88 changer transitions 2/207 dead transitions. [2022-12-13 17:27:43,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 207 transitions, 2993 flow [2022-12-13 17:27:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:27:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 17:27:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3989 transitions. [2022-12-13 17:27:43,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43288117200217036 [2022-12-13 17:27:43,863 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3989 transitions. [2022-12-13 17:27:43,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3989 transitions. [2022-12-13 17:27:43,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:43,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3989 transitions. [2022-12-13 17:27:43,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 209.94736842105263) internal successors, (3989), 19 states have internal predecessors, (3989), 0 states have call successors, (0), 0 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 17:27:43,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 485.0) internal successors, (9700), 20 states have internal predecessors, (9700), 0 states have call successors, (0), 0 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 17:27:43,877 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 485.0) internal successors, (9700), 20 states have internal predecessors, (9700), 0 states have call successors, (0), 0 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 17:27:43,877 INFO L175 Difference]: Start difference. First operand has 139 places, 131 transitions, 1851 flow. Second operand 19 states and 3989 transitions. [2022-12-13 17:27:43,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 207 transitions, 2993 flow [2022-12-13 17:27:43,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 207 transitions, 2796 flow, removed 75 selfloop flow, removed 4 redundant places. [2022-12-13 17:27:43,901 INFO L231 Difference]: Finished difference. Result has 155 places, 156 transitions, 2241 flow [2022-12-13 17:27:43,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2241, PETRI_PLACES=155, PETRI_TRANSITIONS=156} [2022-12-13 17:27:43,902 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2022-12-13 17:27:43,902 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 156 transitions, 2241 flow [2022-12-13 17:27:43,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:27:43,902 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:43,902 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:43,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 17:27:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 17:27:44,103 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1107966428, now seen corresponding path program 13 times [2022-12-13 17:27:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617589948] [2022-12-13 17:27:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617589948] [2022-12-13 17:27:44,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617589948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192641398] [2022-12-13 17:27:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:27:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:44,185 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 17:27:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:44,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:44,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192641398] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:44,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:27:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956459457] [2022-12-13 17:27:44,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:27:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:27:44,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:27:44,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:44,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 156 transitions, 2241 flow. Second operand has 12 states, 12 states have (on average 207.16666666666666) internal successors, (2486), 12 states have internal predecessors, (2486), 0 states have call successors, (0), 0 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 17:27:44,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:44,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:44,659 INFO L130 PetriNetUnfolder]: 389/754 cut-off events. [2022-12-13 17:27:44,659 INFO L131 PetriNetUnfolder]: For 10772/10772 co-relation queries the response was YES. [2022-12-13 17:27:44,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 754 events. 389/754 cut-off events. For 10772/10772 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3771 event pairs, 54 based on Foata normal form. 16/766 useless extension candidates. Maximal degree in co-relation 5358. Up to 264 conditions per place. [2022-12-13 17:27:44,665 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 141 selfloop transitions, 74 changer transitions 2/217 dead transitions. [2022-12-13 17:27:44,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 3190 flow [2022-12-13 17:27:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:27:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:27:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3793 transitions. [2022-12-13 17:27:44,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43447880870561284 [2022-12-13 17:27:44,668 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3793 transitions. [2022-12-13 17:27:44,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3793 transitions. [2022-12-13 17:27:44,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:44,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3793 transitions. [2022-12-13 17:27:44,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 210.72222222222223) internal successors, (3793), 18 states have internal predecessors, (3793), 0 states have call successors, (0), 0 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 17:27:44,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 485.0) internal successors, (9215), 19 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:27:44,676 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 485.0) internal successors, (9215), 19 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:27:44,676 INFO L175 Difference]: Start difference. First operand has 155 places, 156 transitions, 2241 flow. Second operand 18 states and 3793 transitions. [2022-12-13 17:27:44,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 3190 flow [2022-12-13 17:27:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 217 transitions, 2877 flow, removed 122 selfloop flow, removed 8 redundant places. [2022-12-13 17:27:44,706 INFO L231 Difference]: Finished difference. Result has 165 places, 157 transitions, 2242 flow [2022-12-13 17:27:44,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2242, PETRI_PLACES=165, PETRI_TRANSITIONS=157} [2022-12-13 17:27:44,706 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2022-12-13 17:27:44,706 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 157 transitions, 2242 flow [2022-12-13 17:27:44,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.16666666666666) internal successors, (2486), 12 states have internal predecessors, (2486), 0 states have call successors, (0), 0 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 17:27:44,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:44,707 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:44,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 17:27:44,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 17:27:44,908 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1868366695, now seen corresponding path program 14 times [2022-12-13 17:27:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:44,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835290062] [2022-12-13 17:27:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835290062] [2022-12-13 17:27:44,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835290062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856147324] [2022-12-13 17:27:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:27:44,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:44,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:44,998 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:44,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 17:27:45,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:45,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:45,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856147324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:45,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:45,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 17:27:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199261457] [2022-12-13 17:27:45,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:27:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:27:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:27:45,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:45,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 157 transitions, 2242 flow. Second operand has 15 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 17:27:45,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:45,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:45,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:45,509 INFO L130 PetriNetUnfolder]: 481/962 cut-off events. [2022-12-13 17:27:45,509 INFO L131 PetriNetUnfolder]: For 16231/16231 co-relation queries the response was YES. [2022-12-13 17:27:45,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7046 conditions, 962 events. 481/962 cut-off events. For 16231/16231 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5215 event pairs, 21 based on Foata normal form. 16/978 useless extension candidates. Maximal degree in co-relation 6990. Up to 275 conditions per place. [2022-12-13 17:27:45,518 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 128 selfloop transitions, 117 changer transitions 5/250 dead transitions. [2022-12-13 17:27:45,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 250 transitions, 3966 flow [2022-12-13 17:27:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 17:27:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 17:27:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4412 transitions. [2022-12-13 17:27:45,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433186057928326 [2022-12-13 17:27:45,522 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4412 transitions. [2022-12-13 17:27:45,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4412 transitions. [2022-12-13 17:27:45,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:45,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4412 transitions. [2022-12-13 17:27:45,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 210.0952380952381) internal successors, (4412), 21 states have internal predecessors, (4412), 0 states have call successors, (0), 0 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 17:27:45,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 485.0) internal successors, (10670), 22 states have internal predecessors, (10670), 0 states have call successors, (0), 0 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 17:27:45,532 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 485.0) internal successors, (10670), 22 states have internal predecessors, (10670), 0 states have call successors, (0), 0 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 17:27:45,532 INFO L175 Difference]: Start difference. First operand has 165 places, 157 transitions, 2242 flow. Second operand 21 states and 4412 transitions. [2022-12-13 17:27:45,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 250 transitions, 3966 flow [2022-12-13 17:27:45,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 250 transitions, 3596 flow, removed 140 selfloop flow, removed 11 redundant places. [2022-12-13 17:27:45,572 INFO L231 Difference]: Finished difference. Result has 181 places, 188 transitions, 3058 flow [2022-12-13 17:27:45,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3058, PETRI_PLACES=181, PETRI_TRANSITIONS=188} [2022-12-13 17:27:45,572 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2022-12-13 17:27:45,572 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 188 transitions, 3058 flow [2022-12-13 17:27:45,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 17:27:45,573 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:45,573 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:45,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:45,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:45,774 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:45,775 INFO L85 PathProgramCache]: Analyzing trace with hash 369903321, now seen corresponding path program 15 times [2022-12-13 17:27:45,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:45,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457674198] [2022-12-13 17:27:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:45,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:45,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457674198] [2022-12-13 17:27:45,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457674198] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:45,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202173099] [2022-12-13 17:27:45,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:27:45,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:45,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:45,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 17:27:45,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:27:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:45,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:45,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:45,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202173099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:45,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:45,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 17:27:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084206471] [2022-12-13 17:27:45,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:46,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:46,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 188 transitions, 3058 flow. Second operand has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:27:46,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:46,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:46,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:46,538 INFO L130 PetriNetUnfolder]: 631/1258 cut-off events. [2022-12-13 17:27:46,538 INFO L131 PetriNetUnfolder]: For 25048/25048 co-relation queries the response was YES. [2022-12-13 17:27:46,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9568 conditions, 1258 events. 631/1258 cut-off events. For 25048/25048 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7328 event pairs, 49 based on Foata normal form. 24/1282 useless extension candidates. Maximal degree in co-relation 9504. Up to 424 conditions per place. [2022-12-13 17:27:46,549 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 159 selfloop transitions, 132 changer transitions 0/291 dead transitions. [2022-12-13 17:27:46,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 291 transitions, 4931 flow [2022-12-13 17:27:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:27:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 17:27:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3173 transitions. [2022-12-13 17:27:46,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4361512027491409 [2022-12-13 17:27:46,551 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3173 transitions. [2022-12-13 17:27:46,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3173 transitions. [2022-12-13 17:27:46,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:46,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3173 transitions. [2022-12-13 17:27:46,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 211.53333333333333) internal successors, (3173), 15 states have internal predecessors, (3173), 0 states have call successors, (0), 0 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 17:27:46,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 485.0) internal successors, (7760), 16 states have internal predecessors, (7760), 0 states have call successors, (0), 0 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 17:27:46,557 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 485.0) internal successors, (7760), 16 states have internal predecessors, (7760), 0 states have call successors, (0), 0 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 17:27:46,557 INFO L175 Difference]: Start difference. First operand has 181 places, 188 transitions, 3058 flow. Second operand 15 states and 3173 transitions. [2022-12-13 17:27:46,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 291 transitions, 4931 flow [2022-12-13 17:27:46,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 291 transitions, 4567 flow, removed 144 selfloop flow, removed 7 redundant places. [2022-12-13 17:27:46,623 INFO L231 Difference]: Finished difference. Result has 190 places, 228 transitions, 3877 flow [2022-12-13 17:27:46,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3877, PETRI_PLACES=190, PETRI_TRANSITIONS=228} [2022-12-13 17:27:46,623 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2022-12-13 17:27:46,624 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 228 transitions, 3877 flow [2022-12-13 17:27:46,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:27:46,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:46,624 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:46,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:46,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:46,825 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash -207627552, now seen corresponding path program 16 times [2022-12-13 17:27:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:46,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71383482] [2022-12-13 17:27:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:46,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71383482] [2022-12-13 17:27:46,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71383482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770950939] [2022-12-13 17:27:46,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:27:46,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:46,913 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:46,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 17:27:46,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:27:46,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:46,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:46,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:47,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:47,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770950939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:47,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:47,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 17:27:47,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108416516] [2022-12-13 17:27:47,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:47,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:27:47,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:47,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:27:47,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:27:47,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:47,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 228 transitions, 3877 flow. Second operand has 15 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 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 17:27:47,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:47,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:47,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:47,663 INFO L130 PetriNetUnfolder]: 662/1343 cut-off events. [2022-12-13 17:27:47,663 INFO L131 PetriNetUnfolder]: For 29022/29022 co-relation queries the response was YES. [2022-12-13 17:27:47,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10728 conditions, 1343 events. 662/1343 cut-off events. For 29022/29022 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8170 event pairs, 25 based on Foata normal form. 24/1367 useless extension candidates. Maximal degree in co-relation 10660. Up to 595 conditions per place. [2022-12-13 17:27:47,673 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 205 selfloop transitions, 105 changer transitions 7/317 dead transitions. [2022-12-13 17:27:47,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 317 transitions, 5551 flow [2022-12-13 17:27:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:27:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 17:27:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4837 transitions. [2022-12-13 17:27:47,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43361721201255043 [2022-12-13 17:27:47,686 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4837 transitions. [2022-12-13 17:27:47,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4837 transitions. [2022-12-13 17:27:47,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:47,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4837 transitions. [2022-12-13 17:27:47,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 210.30434782608697) internal successors, (4837), 23 states have internal predecessors, (4837), 0 states have call successors, (0), 0 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 17:27:47,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 485.0) internal successors, (11640), 24 states have internal predecessors, (11640), 0 states have call successors, (0), 0 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 17:27:47,697 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 485.0) internal successors, (11640), 24 states have internal predecessors, (11640), 0 states have call successors, (0), 0 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 17:27:47,697 INFO L175 Difference]: Start difference. First operand has 190 places, 228 transitions, 3877 flow. Second operand 23 states and 4837 transitions. [2022-12-13 17:27:47,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 317 transitions, 5551 flow [2022-12-13 17:27:47,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 317 transitions, 5381 flow, removed 66 selfloop flow, removed 5 redundant places. [2022-12-13 17:27:47,794 INFO L231 Difference]: Finished difference. Result has 215 places, 245 transitions, 4522 flow [2022-12-13 17:27:47,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4522, PETRI_PLACES=215, PETRI_TRANSITIONS=245} [2022-12-13 17:27:47,794 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 186 predicate places. [2022-12-13 17:27:47,795 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 245 transitions, 4522 flow [2022-12-13 17:27:47,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 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 17:27:47,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:47,795 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:47,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 17:27:47,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:47,996 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:47,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1668369734, now seen corresponding path program 17 times [2022-12-13 17:27:47,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:47,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970192504] [2022-12-13 17:27:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:47,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:48,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970192504] [2022-12-13 17:27:48,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970192504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:48,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499726320] [2022-12-13 17:27:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:27:48,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:48,091 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:48,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 17:27:48,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:48,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:48,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:48,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:48,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499726320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:48,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:48,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 17:27:48,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122166649] [2022-12-13 17:27:48,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:48,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:27:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:27:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:27:48,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:48,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 245 transitions, 4522 flow. Second operand has 11 states, 11 states have (on average 207.1818181818182) internal successors, (2279), 11 states have internal predecessors, (2279), 0 states have call successors, (0), 0 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 17:27:48,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:48,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:48,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:48,683 INFO L130 PetriNetUnfolder]: 713/1436 cut-off events. [2022-12-13 17:27:48,683 INFO L131 PetriNetUnfolder]: For 37981/37981 co-relation queries the response was YES. [2022-12-13 17:27:48,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12259 conditions, 1436 events. 713/1436 cut-off events. For 37981/37981 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8803 event pairs, 54 based on Foata normal form. 10/1446 useless extension candidates. Maximal degree in co-relation 12183. Up to 979 conditions per place. [2022-12-13 17:27:48,694 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 213 selfloop transitions, 79 changer transitions 0/292 dead transitions. [2022-12-13 17:27:48,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 292 transitions, 6041 flow [2022-12-13 17:27:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:27:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:27:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1482 transitions. [2022-12-13 17:27:48,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4365243004418262 [2022-12-13 17:27:48,696 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1482 transitions. [2022-12-13 17:27:48,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1482 transitions. [2022-12-13 17:27:48,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:48,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1482 transitions. [2022-12-13 17:27:48,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 211.71428571428572) internal successors, (1482), 7 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 17:27:48,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:48,699 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 485.0) internal successors, (3880), 8 states have internal predecessors, (3880), 0 states have call successors, (0), 0 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 17:27:48,699 INFO L175 Difference]: Start difference. First operand has 215 places, 245 transitions, 4522 flow. Second operand 7 states and 1482 transitions. [2022-12-13 17:27:48,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 292 transitions, 6041 flow [2022-12-13 17:27:48,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 292 transitions, 5242 flow, removed 297 selfloop flow, removed 12 redundant places. [2022-12-13 17:27:48,863 INFO L231 Difference]: Finished difference. Result has 209 places, 259 transitions, 4513 flow [2022-12-13 17:27:48,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4513, PETRI_PLACES=209, PETRI_TRANSITIONS=259} [2022-12-13 17:27:48,864 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 180 predicate places. [2022-12-13 17:27:48,864 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 259 transitions, 4513 flow [2022-12-13 17:27:48,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.1818181818182) internal successors, (2279), 11 states have internal predecessors, (2279), 0 states have call successors, (0), 0 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 17:27:48,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:48,864 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:48,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 17:27:49,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 17:27:49,065 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1274021860, now seen corresponding path program 18 times [2022-12-13 17:27:49,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:49,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668299782] [2022-12-13 17:27:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:49,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:49,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668299782] [2022-12-13 17:27:49,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668299782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:49,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724889133] [2022-12-13 17:27:49,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:27:49,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:49,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:49,155 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:49,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 17:27:49,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:27:49,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:49,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:49,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:49,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724889133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:49,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:49,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 17:27:49,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532921192] [2022-12-13 17:27:49,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:49,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:27:49,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:27:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:27:49,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:49,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 259 transitions, 4513 flow. Second operand has 15 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 17:27:49,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:49,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:49,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:49,996 INFO L130 PetriNetUnfolder]: 847/1694 cut-off events. [2022-12-13 17:27:49,996 INFO L131 PetriNetUnfolder]: For 39177/39177 co-relation queries the response was YES. [2022-12-13 17:27:50,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13627 conditions, 1694 events. 847/1694 cut-off events. For 39177/39177 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 10744 event pairs, 82 based on Foata normal form. 36/1730 useless extension candidates. Maximal degree in co-relation 13551. Up to 1245 conditions per place. [2022-12-13 17:27:50,014 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 264 selfloop transitions, 104 changer transitions 0/368 dead transitions. [2022-12-13 17:27:50,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 368 transitions, 6734 flow [2022-12-13 17:27:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:27:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 17:27:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3579 transitions. [2022-12-13 17:27:50,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4340812613705276 [2022-12-13 17:27:50,022 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3579 transitions. [2022-12-13 17:27:50,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3579 transitions. [2022-12-13 17:27:50,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:50,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3579 transitions. [2022-12-13 17:27:50,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 210.52941176470588) internal successors, (3579), 17 states have internal predecessors, (3579), 0 states have call successors, (0), 0 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 17:27:50,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 485.0) internal successors, (8730), 18 states have internal predecessors, (8730), 0 states have call successors, (0), 0 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 17:27:50,037 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 485.0) internal successors, (8730), 18 states have internal predecessors, (8730), 0 states have call successors, (0), 0 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 17:27:50,037 INFO L175 Difference]: Start difference. First operand has 209 places, 259 transitions, 4513 flow. Second operand 17 states and 3579 transitions. [2022-12-13 17:27:50,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 368 transitions, 6734 flow [2022-12-13 17:27:50,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 368 transitions, 6542 flow, removed 81 selfloop flow, removed 3 redundant places. [2022-12-13 17:27:50,189 INFO L231 Difference]: Finished difference. Result has 231 places, 314 transitions, 5660 flow [2022-12-13 17:27:50,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5660, PETRI_PLACES=231, PETRI_TRANSITIONS=314} [2022-12-13 17:27:50,190 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2022-12-13 17:27:50,190 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 314 transitions, 5660 flow [2022-12-13 17:27:50,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 17:27:50,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:50,190 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:50,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 17:27:50,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:50,391 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:50,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1751376390, now seen corresponding path program 19 times [2022-12-13 17:27:50,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:50,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890557500] [2022-12-13 17:27:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:50,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890557500] [2022-12-13 17:27:50,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890557500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:50,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793054440] [2022-12-13 17:27:50,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:27:50,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:50,444 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:50,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 17:27:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:50,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:50,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793054440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:50,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:50,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 17:27:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059566503] [2022-12-13 17:27:50,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:50,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:50,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 314 transitions, 5660 flow. Second operand has 13 states, 13 states have (on average 207.0) internal successors, (2691), 13 states have internal predecessors, (2691), 0 states have call successors, (0), 0 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 17:27:50,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:50,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:50,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:51,294 INFO L130 PetriNetUnfolder]: 937/1886 cut-off events. [2022-12-13 17:27:51,295 INFO L131 PetriNetUnfolder]: For 50951/50951 co-relation queries the response was YES. [2022-12-13 17:27:51,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 1886 events. 937/1886 cut-off events. For 50951/50951 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12405 event pairs, 80 based on Foata normal form. 12/1898 useless extension candidates. Maximal degree in co-relation 16055. Up to 1062 conditions per place. [2022-12-13 17:27:51,322 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 252 selfloop transitions, 145 changer transitions 0/397 dead transitions. [2022-12-13 17:27:51,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 397 transitions, 7734 flow [2022-12-13 17:27:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:27:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 17:27:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3173 transitions. [2022-12-13 17:27:51,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4361512027491409 [2022-12-13 17:27:51,327 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3173 transitions. [2022-12-13 17:27:51,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3173 transitions. [2022-12-13 17:27:51,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:51,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3173 transitions. [2022-12-13 17:27:51,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 211.53333333333333) internal successors, (3173), 15 states have internal predecessors, (3173), 0 states have call successors, (0), 0 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 17:27:51,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 485.0) internal successors, (7760), 16 states have internal predecessors, (7760), 0 states have call successors, (0), 0 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 17:27:51,338 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 485.0) internal successors, (7760), 16 states have internal predecessors, (7760), 0 states have call successors, (0), 0 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 17:27:51,339 INFO L175 Difference]: Start difference. First operand has 231 places, 314 transitions, 5660 flow. Second operand 15 states and 3173 transitions. [2022-12-13 17:27:51,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 397 transitions, 7734 flow [2022-12-13 17:27:51,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 397 transitions, 7446 flow, removed 113 selfloop flow, removed 6 redundant places. [2022-12-13 17:27:51,574 INFO L231 Difference]: Finished difference. Result has 244 places, 336 transitions, 6501 flow [2022-12-13 17:27:51,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6501, PETRI_PLACES=244, PETRI_TRANSITIONS=336} [2022-12-13 17:27:51,575 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2022-12-13 17:27:51,575 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 336 transitions, 6501 flow [2022-12-13 17:27:51,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 207.0) internal successors, (2691), 13 states have internal predecessors, (2691), 0 states have call successors, (0), 0 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 17:27:51,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:51,575 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:51,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 17:27:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 17:27:51,777 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash -44567826, now seen corresponding path program 20 times [2022-12-13 17:27:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:51,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581236194] [2022-12-13 17:27:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:51,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:51,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581236194] [2022-12-13 17:27:51,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581236194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:51,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381157319] [2022-12-13 17:27:51,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:27:51,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:51,870 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:51,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 17:27:51,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:51,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:51,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:52,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381157319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:52,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:52,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 17:27:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444136153] [2022-12-13 17:27:52,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:52,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:52,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 336 transitions, 6501 flow. Second operand has 13 states, 13 states have (on average 207.0) internal successors, (2691), 13 states have internal predecessors, (2691), 0 states have call successors, (0), 0 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 17:27:52,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:52,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:52,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:52,624 INFO L130 PetriNetUnfolder]: 976/1945 cut-off events. [2022-12-13 17:27:52,624 INFO L131 PetriNetUnfolder]: For 56098/56098 co-relation queries the response was YES. [2022-12-13 17:27:52,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17271 conditions, 1945 events. 976/1945 cut-off events. For 56098/56098 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 12727 event pairs, 102 based on Foata normal form. 6/1951 useless extension candidates. Maximal degree in co-relation 17183. Up to 1649 conditions per place. [2022-12-13 17:27:52,640 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 297 selfloop transitions, 86 changer transitions 0/383 dead transitions. [2022-12-13 17:27:52,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 383 transitions, 7987 flow [2022-12-13 17:27:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:27:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:27:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2311 transitions. [2022-12-13 17:27:52,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331771321462043 [2022-12-13 17:27:52,642 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2311 transitions. [2022-12-13 17:27:52,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2311 transitions. [2022-12-13 17:27:52,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:52,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2311 transitions. [2022-12-13 17:27:52,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 210.0909090909091) internal successors, (2311), 11 states have internal predecessors, (2311), 0 states have call successors, (0), 0 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 17:27:52,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:27:52,646 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:27:52,646 INFO L175 Difference]: Start difference. First operand has 244 places, 336 transitions, 6501 flow. Second operand 11 states and 2311 transitions. [2022-12-13 17:27:52,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 383 transitions, 7987 flow [2022-12-13 17:27:52,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 383 transitions, 7668 flow, removed 120 selfloop flow, removed 10 redundant places. [2022-12-13 17:27:52,860 INFO L231 Difference]: Finished difference. Result has 246 places, 356 transitions, 6797 flow [2022-12-13 17:27:52,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6797, PETRI_PLACES=246, PETRI_TRANSITIONS=356} [2022-12-13 17:27:52,860 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2022-12-13 17:27:52,860 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 356 transitions, 6797 flow [2022-12-13 17:27:52,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 207.0) internal successors, (2691), 13 states have internal predecessors, (2691), 0 states have call successors, (0), 0 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 17:27:52,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:52,861 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:52,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 17:27:53,062 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash -338289243, now seen corresponding path program 21 times [2022-12-13 17:27:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:53,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636014597] [2022-12-13 17:27:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636014597] [2022-12-13 17:27:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636014597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770048014] [2022-12-13 17:27:53,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:27:53,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:53,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:53,137 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:53,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 17:27:53,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:27:53,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:53,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:53,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770048014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:53,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:53,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 17:27:53,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692027704] [2022-12-13 17:27:53,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:53,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:27:53,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:27:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:27:53,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:53,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 356 transitions, 6797 flow. Second operand has 11 states, 11 states have (on average 207.0909090909091) internal successors, (2278), 11 states have internal predecessors, (2278), 0 states have call successors, (0), 0 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 17:27:53,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:53,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:53,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:53,921 INFO L130 PetriNetUnfolder]: 976/1949 cut-off events. [2022-12-13 17:27:53,921 INFO L131 PetriNetUnfolder]: For 55010/55010 co-relation queries the response was YES. [2022-12-13 17:27:53,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17220 conditions, 1949 events. 976/1949 cut-off events. For 55010/55010 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 12878 event pairs, 199 based on Foata normal form. 2/1951 useless extension candidates. Maximal degree in co-relation 17129. Up to 764 conditions per place. [2022-12-13 17:27:53,936 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 288 selfloop transitions, 106 changer transitions 5/399 dead transitions. [2022-12-13 17:27:53,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 399 transitions, 8308 flow [2022-12-13 17:27:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:27:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:27:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2309 transitions. [2022-12-13 17:27:53,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43280224929709465 [2022-12-13 17:27:53,938 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2309 transitions. [2022-12-13 17:27:53,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2309 transitions. [2022-12-13 17:27:53,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:53,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2309 transitions. [2022-12-13 17:27:53,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 209.9090909090909) internal successors, (2309), 11 states have internal predecessors, (2309), 0 states have call successors, (0), 0 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 17:27:53,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:27:53,942 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:27:53,942 INFO L175 Difference]: Start difference. First operand has 246 places, 356 transitions, 6797 flow. Second operand 11 states and 2309 transitions. [2022-12-13 17:27:53,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 399 transitions, 8308 flow [2022-12-13 17:27:54,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 399 transitions, 8177 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-12-13 17:27:54,177 INFO L231 Difference]: Finished difference. Result has 255 places, 362 transitions, 7158 flow [2022-12-13 17:27:54,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=6668, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7158, PETRI_PLACES=255, PETRI_TRANSITIONS=362} [2022-12-13 17:27:54,177 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 226 predicate places. [2022-12-13 17:27:54,177 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 362 transitions, 7158 flow [2022-12-13 17:27:54,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 207.0909090909091) internal successors, (2278), 11 states have internal predecessors, (2278), 0 states have call successors, (0), 0 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 17:27:54,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:54,178 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:54,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 17:27:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:54,379 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 203814757, now seen corresponding path program 22 times [2022-12-13 17:27:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722165221] [2022-12-13 17:27:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:54,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:54,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722165221] [2022-12-13 17:27:54,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722165221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:54,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942368741] [2022-12-13 17:27:54,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:27:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:54,470 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 17:27:54,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:27:54,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:54,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:54,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942368741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:54,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:54,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 17:27:54,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571789337] [2022-12-13 17:27:54,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:27:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:27:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:27:54,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:54,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 362 transitions, 7158 flow. Second operand has 15 states, 15 states have (on average 207.13333333333333) internal successors, (3107), 15 states have internal predecessors, (3107), 0 states have call successors, (0), 0 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 17:27:54,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:54,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:54,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:55,371 INFO L130 PetriNetUnfolder]: 1069/2154 cut-off events. [2022-12-13 17:27:55,371 INFO L131 PetriNetUnfolder]: For 75600/75600 co-relation queries the response was YES. [2022-12-13 17:27:55,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20254 conditions, 2154 events. 1069/2154 cut-off events. For 75600/75600 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14611 event pairs, 391 based on Foata normal form. 54/2208 useless extension candidates. Maximal degree in co-relation 20159. Up to 1817 conditions per place. [2022-12-13 17:27:55,413 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 378 selfloop transitions, 65 changer transitions 0/443 dead transitions. [2022-12-13 17:27:55,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 443 transitions, 9735 flow [2022-12-13 17:27:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:27:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:27:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2754 transitions. [2022-12-13 17:27:55,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367961934972244 [2022-12-13 17:27:55,417 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2754 transitions. [2022-12-13 17:27:55,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2754 transitions. [2022-12-13 17:27:55,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:55,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2754 transitions. [2022-12-13 17:27:55,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.84615384615384) internal successors, (2754), 13 states have internal predecessors, (2754), 0 states have call successors, (0), 0 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 17:27:55,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 485.0) internal successors, (6790), 14 states have internal predecessors, (6790), 0 states have call successors, (0), 0 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 17:27:55,425 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 485.0) internal successors, (6790), 14 states have internal predecessors, (6790), 0 states have call successors, (0), 0 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 17:27:55,425 INFO L175 Difference]: Start difference. First operand has 255 places, 362 transitions, 7158 flow. Second operand 13 states and 2754 transitions. [2022-12-13 17:27:55,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 443 transitions, 9735 flow [2022-12-13 17:27:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 443 transitions, 9474 flow, removed 93 selfloop flow, removed 3 redundant places. [2022-12-13 17:27:55,751 INFO L231 Difference]: Finished difference. Result has 269 places, 391 transitions, 8197 flow [2022-12-13 17:27:55,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=6971, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8197, PETRI_PLACES=269, PETRI_TRANSITIONS=391} [2022-12-13 17:27:55,751 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2022-12-13 17:27:55,751 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 391 transitions, 8197 flow [2022-12-13 17:27:55,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 207.13333333333333) internal successors, (3107), 15 states have internal predecessors, (3107), 0 states have call successors, (0), 0 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 17:27:55,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:55,752 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:55,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 17:27:55,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:55,953 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1310201781, now seen corresponding path program 23 times [2022-12-13 17:27:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825066613] [2022-12-13 17:27:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:56,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:56,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825066613] [2022-12-13 17:27:56,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825066613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370617804] [2022-12-13 17:27:56,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:27:56,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:56,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:56,050 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 17:27:56,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:27:56,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:56,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:56,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:27:56,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370617804] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:56,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:56,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 17:27:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204314689] [2022-12-13 17:27:56,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:56,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:56,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:56,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 391 transitions, 8197 flow. Second operand has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:27:56,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:56,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:56,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:57,087 INFO L130 PetriNetUnfolder]: 1196/2421 cut-off events. [2022-12-13 17:27:57,087 INFO L131 PetriNetUnfolder]: For 93883/93883 co-relation queries the response was YES. [2022-12-13 17:27:57,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23706 conditions, 2421 events. 1196/2421 cut-off events. For 93883/93883 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 17002 event pairs, 202 based on Foata normal form. 16/2437 useless extension candidates. Maximal degree in co-relation 23605. Up to 852 conditions per place. [2022-12-13 17:27:57,107 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 330 selfloop transitions, 158 changer transitions 2/490 dead transitions. [2022-12-13 17:27:57,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 490 transitions, 10997 flow [2022-12-13 17:27:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:27:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 17:27:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3370 transitions. [2022-12-13 17:27:57,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43427835051546393 [2022-12-13 17:27:57,109 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3370 transitions. [2022-12-13 17:27:57,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3370 transitions. [2022-12-13 17:27:57,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:57,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3370 transitions. [2022-12-13 17:27:57,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 210.625) internal successors, (3370), 16 states have internal predecessors, (3370), 0 states have call successors, (0), 0 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 17:27:57,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 485.0) internal successors, (8245), 17 states have internal predecessors, (8245), 0 states have call successors, (0), 0 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 17:27:57,118 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 485.0) internal successors, (8245), 17 states have internal predecessors, (8245), 0 states have call successors, (0), 0 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 17:27:57,118 INFO L175 Difference]: Start difference. First operand has 269 places, 391 transitions, 8197 flow. Second operand 16 states and 3370 transitions. [2022-12-13 17:27:57,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 490 transitions, 10997 flow [2022-12-13 17:27:57,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 490 transitions, 10377 flow, removed 276 selfloop flow, removed 6 redundant places. [2022-12-13 17:27:57,469 INFO L231 Difference]: Finished difference. Result has 286 places, 427 transitions, 9192 flow [2022-12-13 17:27:57,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9192, PETRI_PLACES=286, PETRI_TRANSITIONS=427} [2022-12-13 17:27:57,469 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2022-12-13 17:27:57,469 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 427 transitions, 9192 flow [2022-12-13 17:27:57,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:27:57,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:57,469 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:57,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 17:27:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 17:27:57,670 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2115187357, now seen corresponding path program 24 times [2022-12-13 17:27:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:57,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560651103] [2022-12-13 17:27:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:57,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560651103] [2022-12-13 17:27:57,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560651103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320687573] [2022-12-13 17:27:57,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:27:57,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:57,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:57,743 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:57,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 17:27:57,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:27:57,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:27:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:27:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:27:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:57,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:27:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:57,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320687573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:27:57,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:27:57,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 17:27:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155072536] [2022-12-13 17:27:57,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:27:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:27:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:27:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:27:57,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:27:57,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 427 transitions, 9192 flow. Second operand has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:27:57,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:57,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:27:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:59,115 INFO L130 PetriNetUnfolder]: 1214/2483 cut-off events. [2022-12-13 17:27:59,115 INFO L131 PetriNetUnfolder]: For 110604/110604 co-relation queries the response was YES. [2022-12-13 17:27:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24778 conditions, 2483 events. 1214/2483 cut-off events. For 110604/110604 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 17638 event pairs, 387 based on Foata normal form. 18/2501 useless extension candidates. Maximal degree in co-relation 24669. Up to 1763 conditions per place. [2022-12-13 17:27:59,144 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 374 selfloop transitions, 107 changer transitions 0/481 dead transitions. [2022-12-13 17:27:59,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 481 transitions, 10915 flow [2022-12-13 17:27:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:27:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:27:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2540 transitions. [2022-12-13 17:27:59,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436426116838488 [2022-12-13 17:27:59,148 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2540 transitions. [2022-12-13 17:27:59,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2540 transitions. [2022-12-13 17:27:59,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:59,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2540 transitions. [2022-12-13 17:27:59,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 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 17:27:59,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 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 17:27:59,155 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 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 17:27:59,155 INFO L175 Difference]: Start difference. First operand has 286 places, 427 transitions, 9192 flow. Second operand 12 states and 2540 transitions. [2022-12-13 17:27:59,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 481 transitions, 10915 flow [2022-12-13 17:27:59,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 481 transitions, 10372 flow, removed 239 selfloop flow, removed 6 redundant places. [2022-12-13 17:27:59,675 INFO L231 Difference]: Finished difference. Result has 292 places, 435 transitions, 9199 flow [2022-12-13 17:27:59,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=8592, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9199, PETRI_PLACES=292, PETRI_TRANSITIONS=435} [2022-12-13 17:27:59,675 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 263 predicate places. [2022-12-13 17:27:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 435 transitions, 9199 flow [2022-12-13 17:27:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:27:59,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:59,676 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:59,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 17:27:59,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 17:27:59,876 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:27:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash -123082659, now seen corresponding path program 25 times [2022-12-13 17:27:59,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:59,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804408069] [2022-12-13 17:27:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:59,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:59,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804408069] [2022-12-13 17:27:59,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804408069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:27:59,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019404414] [2022-12-13 17:27:59,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:27:59,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:27:59,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:27:59,954 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:27:59,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 17:28:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:00,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:00,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019404414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:00,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:00,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 17:28:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982703229] [2022-12-13 17:28:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:28:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:28:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:28:00,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:28:00,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 435 transitions, 9199 flow. Second operand has 15 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 17:28:00,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:00,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:28:00,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:01,175 INFO L130 PetriNetUnfolder]: 1241/2540 cut-off events. [2022-12-13 17:28:01,176 INFO L131 PetriNetUnfolder]: For 110362/110362 co-relation queries the response was YES. [2022-12-13 17:28:01,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25107 conditions, 2540 events. 1241/2540 cut-off events. For 110362/110362 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 18129 event pairs, 218 based on Foata normal form. 12/2552 useless extension candidates. Maximal degree in co-relation 24995. Up to 912 conditions per place. [2022-12-13 17:28:01,198 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 338 selfloop transitions, 166 changer transitions 4/508 dead transitions. [2022-12-13 17:28:01,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 508 transitions, 11408 flow [2022-12-13 17:28:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:28:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:28:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4194 transitions. [2022-12-13 17:28:01,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43237113402061855 [2022-12-13 17:28:01,201 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4194 transitions. [2022-12-13 17:28:01,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4194 transitions. [2022-12-13 17:28:01,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:01,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4194 transitions. [2022-12-13 17:28:01,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 209.7) internal successors, (4194), 20 states have internal predecessors, (4194), 0 states have call successors, (0), 0 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 17:28:01,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:28:01,210 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:28:01,210 INFO L175 Difference]: Start difference. First operand has 292 places, 435 transitions, 9199 flow. Second operand 20 states and 4194 transitions. [2022-12-13 17:28:01,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 508 transitions, 11408 flow [2022-12-13 17:28:01,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 508 transitions, 11101 flow, removed 83 selfloop flow, removed 8 redundant places. [2022-12-13 17:28:01,684 INFO L231 Difference]: Finished difference. Result has 310 places, 452 transitions, 9939 flow [2022-12-13 17:28:01,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=8838, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9939, PETRI_PLACES=310, PETRI_TRANSITIONS=452} [2022-12-13 17:28:01,684 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 281 predicate places. [2022-12-13 17:28:01,684 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 452 transitions, 9939 flow [2022-12-13 17:28:01,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.73333333333332) internal successors, (3101), 15 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 17:28:01,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:01,685 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:01,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 17:28:01,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:01,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2135539804, now seen corresponding path program 26 times [2022-12-13 17:28:01,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:01,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554962880] [2022-12-13 17:28:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:01,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:01,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554962880] [2022-12-13 17:28:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554962880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186800582] [2022-12-13 17:28:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:28:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:01,965 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:01,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 17:28:02,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:02,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:02,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:02,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:02,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186800582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:02,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:02,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:28:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954527003] [2022-12-13 17:28:02,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:28:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:28:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:28:02,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:28:02,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 452 transitions, 9939 flow. Second operand has 12 states, 12 states have (on average 207.16666666666666) internal successors, (2486), 12 states have internal predecessors, (2486), 0 states have call successors, (0), 0 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 17:28:02,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:02,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:28:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:03,162 INFO L130 PetriNetUnfolder]: 1251/2542 cut-off events. [2022-12-13 17:28:03,162 INFO L131 PetriNetUnfolder]: For 117216/117216 co-relation queries the response was YES. [2022-12-13 17:28:03,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25997 conditions, 2542 events. 1251/2542 cut-off events. For 117216/117216 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 18085 event pairs, 46 based on Foata normal form. 20/2562 useless extension candidates. Maximal degree in co-relation 25881. Up to 1087 conditions per place. [2022-12-13 17:28:03,210 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 318 selfloop transitions, 203 changer transitions 5/526 dead transitions. [2022-12-13 17:28:03,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 526 transitions, 12123 flow [2022-12-13 17:28:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:28:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:28:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4201 transitions. [2022-12-13 17:28:03,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4330927835051546 [2022-12-13 17:28:03,215 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4201 transitions. [2022-12-13 17:28:03,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4201 transitions. [2022-12-13 17:28:03,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:03,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4201 transitions. [2022-12-13 17:28:03,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 210.05) internal successors, (4201), 20 states have internal predecessors, (4201), 0 states have call successors, (0), 0 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 17:28:03,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:28:03,226 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:28:03,226 INFO L175 Difference]: Start difference. First operand has 310 places, 452 transitions, 9939 flow. Second operand 20 states and 4201 transitions. [2022-12-13 17:28:03,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 526 transitions, 12123 flow [2022-12-13 17:28:03,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 526 transitions, 11851 flow, removed 97 selfloop flow, removed 9 redundant places. [2022-12-13 17:28:03,869 INFO L231 Difference]: Finished difference. Result has 323 places, 465 transitions, 10559 flow [2022-12-13 17:28:03,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10559, PETRI_PLACES=323, PETRI_TRANSITIONS=465} [2022-12-13 17:28:03,869 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 294 predicate places. [2022-12-13 17:28:03,869 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 465 transitions, 10559 flow [2022-12-13 17:28:03,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.16666666666666) internal successors, (2486), 12 states have internal predecessors, (2486), 0 states have call successors, (0), 0 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 17:28:03,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:03,870 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:03,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 17:28:04,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 17:28:04,071 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1656773878, now seen corresponding path program 27 times [2022-12-13 17:28:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:04,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553899721] [2022-12-13 17:28:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:04,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:04,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553899721] [2022-12-13 17:28:04,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553899721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878377760] [2022-12-13 17:28:04,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:28:04,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:04,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:04,156 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:04,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 17:28:04,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:28:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:04,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:04,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878377760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:04,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:04,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:28:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606988440] [2022-12-13 17:28:04,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:04,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:28:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:28:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:28:04,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:28:04,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 465 transitions, 10559 flow. Second operand has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:28:04,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:04,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:28:04,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:05,334 INFO L130 PetriNetUnfolder]: 1239/2510 cut-off events. [2022-12-13 17:28:05,334 INFO L131 PetriNetUnfolder]: For 124669/124669 co-relation queries the response was YES. [2022-12-13 17:28:05,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26499 conditions, 2510 events. 1239/2510 cut-off events. For 124669/124669 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17569 event pairs, 122 based on Foata normal form. 8/2518 useless extension candidates. Maximal degree in co-relation 26377. Up to 1906 conditions per place. [2022-12-13 17:28:05,361 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 351 selfloop transitions, 142 changer transitions 0/493 dead transitions. [2022-12-13 17:28:05,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 493 transitions, 11925 flow [2022-12-13 17:28:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:28:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:28:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2943 transitions. [2022-12-13 17:28:05,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334315169366716 [2022-12-13 17:28:05,364 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2943 transitions. [2022-12-13 17:28:05,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2943 transitions. [2022-12-13 17:28:05,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:05,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2943 transitions. [2022-12-13 17:28:05,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.21428571428572) internal successors, (2943), 14 states have internal predecessors, (2943), 0 states have call successors, (0), 0 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 17:28:05,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:28:05,369 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:28:05,369 INFO L175 Difference]: Start difference. First operand has 323 places, 465 transitions, 10559 flow. Second operand 14 states and 2943 transitions. [2022-12-13 17:28:05,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 493 transitions, 11925 flow [2022-12-13 17:28:05,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 493 transitions, 11689 flow, removed 44 selfloop flow, removed 9 redundant places. [2022-12-13 17:28:05,952 INFO L231 Difference]: Finished difference. Result has 323 places, 461 transitions, 10608 flow [2022-12-13 17:28:05,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=10203, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10608, PETRI_PLACES=323, PETRI_TRANSITIONS=461} [2022-12-13 17:28:05,952 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 294 predicate places. [2022-12-13 17:28:05,952 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 461 transitions, 10608 flow [2022-12-13 17:28:05,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:28:05,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:05,953 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:05,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:06,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 17:28:06,154 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash -978031535, now seen corresponding path program 28 times [2022-12-13 17:28:06,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:06,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637379839] [2022-12-13 17:28:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:06,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:06,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637379839] [2022-12-13 17:28:06,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637379839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324531791] [2022-12-13 17:28:06,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:28:06,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:06,234 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:06,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 17:28:06,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:28:06,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:06,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:06,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324531791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:06,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:06,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:28:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862759258] [2022-12-13 17:28:06,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:06,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:28:06,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:06,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:28:06,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:28:06,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:28:06,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 461 transitions, 10608 flow. Second operand has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:28:06,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:06,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:28:06,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:07,430 INFO L130 PetriNetUnfolder]: 1301/2650 cut-off events. [2022-12-13 17:28:07,430 INFO L131 PetriNetUnfolder]: For 143909/143909 co-relation queries the response was YES. [2022-12-13 17:28:07,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28552 conditions, 2650 events. 1301/2650 cut-off events. For 143909/143909 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 18957 event pairs, 331 based on Foata normal form. 12/2662 useless extension candidates. Maximal degree in co-relation 28431. Up to 1555 conditions per place. [2022-12-13 17:28:07,457 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 358 selfloop transitions, 176 changer transitions 0/534 dead transitions. [2022-12-13 17:28:07,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 534 transitions, 13217 flow [2022-12-13 17:28:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:28:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:28:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2750 transitions. [2022-12-13 17:28:07,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43616177636796194 [2022-12-13 17:28:07,460 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2750 transitions. [2022-12-13 17:28:07,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2750 transitions. [2022-12-13 17:28:07,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:07,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2750 transitions. [2022-12-13 17:28:07,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.53846153846155) internal successors, (2750), 13 states have internal predecessors, (2750), 0 states have call successors, (0), 0 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 17:28:07,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 485.0) internal successors, (6790), 14 states have internal predecessors, (6790), 0 states have call successors, (0), 0 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 17:28:07,464 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 485.0) internal successors, (6790), 14 states have internal predecessors, (6790), 0 states have call successors, (0), 0 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 17:28:07,464 INFO L175 Difference]: Start difference. First operand has 323 places, 461 transitions, 10608 flow. Second operand 13 states and 2750 transitions. [2022-12-13 17:28:07,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 534 transitions, 13217 flow [2022-12-13 17:28:08,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 534 transitions, 12913 flow, removed 4 selfloop flow, removed 15 redundant places. [2022-12-13 17:28:08,097 INFO L231 Difference]: Finished difference. Result has 323 places, 478 transitions, 11436 flow [2022-12-13 17:28:08,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=10246, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11436, PETRI_PLACES=323, PETRI_TRANSITIONS=478} [2022-12-13 17:28:08,097 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 294 predicate places. [2022-12-13 17:28:08,097 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 478 transitions, 11436 flow [2022-12-13 17:28:08,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:28:08,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:08,097 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:08,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 17:28:08,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:08,298 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash -108453377, now seen corresponding path program 29 times [2022-12-13 17:28:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:08,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646615865] [2022-12-13 17:28:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:08,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:08,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646615865] [2022-12-13 17:28:08,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646615865] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345677287] [2022-12-13 17:28:08,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:28:08,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:08,348 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:08,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 17:28:08,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:08,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:08,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:08,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345677287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:08,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:08,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 17:28:08,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203396157] [2022-12-13 17:28:08,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:08,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:28:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:28:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:28:08,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:28:08,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 478 transitions, 11436 flow. Second operand has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:28:08,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:08,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:28:08,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:10,015 INFO L130 PetriNetUnfolder]: 1295/2644 cut-off events. [2022-12-13 17:28:10,015 INFO L131 PetriNetUnfolder]: For 144117/144117 co-relation queries the response was YES. [2022-12-13 17:28:10,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29110 conditions, 2644 events. 1295/2644 cut-off events. For 144117/144117 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19023 event pairs, 180 based on Foata normal form. 6/2650 useless extension candidates. Maximal degree in co-relation 28989. Up to 788 conditions per place. [2022-12-13 17:28:10,050 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 331 selfloop transitions, 207 changer transitions 2/540 dead transitions. [2022-12-13 17:28:10,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 540 transitions, 13603 flow [2022-12-13 17:28:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:28:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:28:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3783 transitions. [2022-12-13 17:28:10,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-12-13 17:28:10,054 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3783 transitions. [2022-12-13 17:28:10,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3783 transitions. [2022-12-13 17:28:10,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:10,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3783 transitions. [2022-12-13 17:28:10,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 210.16666666666666) internal successors, (3783), 18 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 17:28:10,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 485.0) internal successors, (9215), 19 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:28:10,064 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 485.0) internal successors, (9215), 19 states have internal predecessors, (9215), 0 states have call successors, (0), 0 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 17:28:10,064 INFO L175 Difference]: Start difference. First operand has 323 places, 478 transitions, 11436 flow. Second operand 18 states and 3783 transitions. [2022-12-13 17:28:10,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 540 transitions, 13603 flow [2022-12-13 17:28:10,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 540 transitions, 13277 flow, removed 108 selfloop flow, removed 5 redundant places. [2022-12-13 17:28:10,740 INFO L231 Difference]: Finished difference. Result has 336 places, 480 transitions, 11710 flow [2022-12-13 17:28:10,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=11013, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11710, PETRI_PLACES=336, PETRI_TRANSITIONS=480} [2022-12-13 17:28:10,740 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 307 predicate places. [2022-12-13 17:28:10,740 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 480 transitions, 11710 flow [2022-12-13 17:28:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 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 17:28:10,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:10,741 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:10,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 17:28:10,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 17:28:10,942 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1078665745, now seen corresponding path program 30 times [2022-12-13 17:28:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:10,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152173103] [2022-12-13 17:28:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:11,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:11,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152173103] [2022-12-13 17:28:11,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152173103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:11,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181644651] [2022-12-13 17:28:11,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:28:11,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:11,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:11,028 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:11,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 17:28:11,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 17:28:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:11,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:11,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181644651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:11,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:11,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 17:28:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289286587] [2022-12-13 17:28:11,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:11,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:28:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:28:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:28:11,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:28:11,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 480 transitions, 11710 flow. Second operand has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:28:11,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:11,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:28:11,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:12,274 INFO L130 PetriNetUnfolder]: 1290/2629 cut-off events. [2022-12-13 17:28:12,274 INFO L131 PetriNetUnfolder]: For 146796/146796 co-relation queries the response was YES. [2022-12-13 17:28:12,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29536 conditions, 2629 events. 1290/2629 cut-off events. For 146796/146796 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 18850 event pairs, 240 based on Foata normal form. 2/2631 useless extension candidates. Maximal degree in co-relation 29415. Up to 1018 conditions per place. [2022-12-13 17:28:12,300 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 352 selfloop transitions, 163 changer transitions 4/519 dead transitions. [2022-12-13 17:28:12,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 519 transitions, 13301 flow [2022-12-13 17:28:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:28:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 17:28:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3353 transitions. [2022-12-13 17:28:12,303 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320876288659794 [2022-12-13 17:28:12,303 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3353 transitions. [2022-12-13 17:28:12,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3353 transitions. [2022-12-13 17:28:12,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:12,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3353 transitions. [2022-12-13 17:28:12,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 209.5625) internal successors, (3353), 16 states have internal predecessors, (3353), 0 states have call successors, (0), 0 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 17:28:12,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 485.0) internal successors, (8245), 17 states have internal predecessors, (8245), 0 states have call successors, (0), 0 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 17:28:12,311 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 485.0) internal successors, (8245), 17 states have internal predecessors, (8245), 0 states have call successors, (0), 0 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 17:28:12,311 INFO L175 Difference]: Start difference. First operand has 336 places, 480 transitions, 11710 flow. Second operand 16 states and 3353 transitions. [2022-12-13 17:28:12,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 519 transitions, 13301 flow [2022-12-13 17:28:13,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 519 transitions, 12946 flow, removed 81 selfloop flow, removed 9 redundant places. [2022-12-13 17:28:13,087 INFO L231 Difference]: Finished difference. Result has 339 places, 476 transitions, 11581 flow [2022-12-13 17:28:13,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=11294, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11581, PETRI_PLACES=339, PETRI_TRANSITIONS=476} [2022-12-13 17:28:13,087 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 310 predicate places. [2022-12-13 17:28:13,088 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 476 transitions, 11581 flow [2022-12-13 17:28:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 206.92307692307693) internal successors, (2690), 13 states have internal predecessors, (2690), 0 states have call successors, (0), 0 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 17:28:13,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:13,088 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:13,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 17:28:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:13,288 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash -158099373, now seen corresponding path program 31 times [2022-12-13 17:28:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:13,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438439211] [2022-12-13 17:28:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:13,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:13,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438439211] [2022-12-13 17:28:13,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438439211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:13,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755690400] [2022-12-13 17:28:13,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:28:13,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:13,653 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:13,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 17:28:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:13,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:14,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755690400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:14,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 17:28:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107468285] [2022-12-13 17:28:14,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:28:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:28:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:28:14,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:14,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 476 transitions, 11581 flow. Second operand has 18 states, 18 states have (on average 199.0) internal successors, (3582), 18 states have internal predecessors, (3582), 0 states have call successors, (0), 0 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 17:28:14,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:14,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:14,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:15,728 INFO L130 PetriNetUnfolder]: 1481/3049 cut-off events. [2022-12-13 17:28:15,728 INFO L131 PetriNetUnfolder]: For 176227/176231 co-relation queries the response was YES. [2022-12-13 17:28:15,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34739 conditions, 3049 events. 1481/3049 cut-off events. For 176227/176231 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 22719 event pairs, 145 based on Foata normal form. 5/3050 useless extension candidates. Maximal degree in co-relation 34617. Up to 2446 conditions per place. [2022-12-13 17:28:15,759 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 476 selfloop transitions, 107 changer transitions 13/606 dead transitions. [2022-12-13 17:28:15,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 606 transitions, 15254 flow [2022-12-13 17:28:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:28:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:28:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2247 transitions. [2022-12-13 17:28:15,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4211808809746954 [2022-12-13 17:28:15,760 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2247 transitions. [2022-12-13 17:28:15,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2247 transitions. [2022-12-13 17:28:15,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:15,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2247 transitions. [2022-12-13 17:28:15,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 204.27272727272728) internal successors, (2247), 11 states have internal predecessors, (2247), 0 states have call successors, (0), 0 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 17:28:15,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:15,764 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:15,764 INFO L175 Difference]: Start difference. First operand has 339 places, 476 transitions, 11581 flow. Second operand 11 states and 2247 transitions. [2022-12-13 17:28:15,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 606 transitions, 15254 flow [2022-12-13 17:28:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 606 transitions, 14928 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 17:28:16,533 INFO L231 Difference]: Finished difference. Result has 341 places, 537 transitions, 13411 flow [2022-12-13 17:28:16,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=11331, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13411, PETRI_PLACES=341, PETRI_TRANSITIONS=537} [2022-12-13 17:28:16,533 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 312 predicate places. [2022-12-13 17:28:16,533 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 537 transitions, 13411 flow [2022-12-13 17:28:16,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 199.0) internal successors, (3582), 18 states have internal predecessors, (3582), 0 states have call successors, (0), 0 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 17:28:16,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:16,534 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:16,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 17:28:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 17:28:16,734 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash 182900797, now seen corresponding path program 32 times [2022-12-13 17:28:16,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:16,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776044672] [2022-12-13 17:28:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:17,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:17,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776044672] [2022-12-13 17:28:17,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776044672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:17,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777972496] [2022-12-13 17:28:17,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:28:17,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:17,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:17,039 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:17,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 17:28:17,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:17,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:17,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:17,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:17,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777972496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:17,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:17,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 17:28:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672069473] [2022-12-13 17:28:17,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:17,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:28:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:28:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:28:17,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:17,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 537 transitions, 13411 flow. Second operand has 16 states, 16 states have (on average 199.125) internal successors, (3186), 16 states have internal predecessors, (3186), 0 states have call successors, (0), 0 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 17:28:17,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:17,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:17,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:18,953 INFO L130 PetriNetUnfolder]: 1482/3026 cut-off events. [2022-12-13 17:28:18,953 INFO L131 PetriNetUnfolder]: For 182907/182909 co-relation queries the response was YES. [2022-12-13 17:28:18,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35826 conditions, 3026 events. 1482/3026 cut-off events. For 182907/182909 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22367 event pairs, 158 based on Foata normal form. 7/3028 useless extension candidates. Maximal degree in co-relation 35695. Up to 2655 conditions per place. [2022-12-13 17:28:18,987 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 483 selfloop transitions, 78 changer transitions 18/589 dead transitions. [2022-12-13 17:28:18,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 589 transitions, 15151 flow [2022-12-13 17:28:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:28:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:28:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2435 transitions. [2022-12-13 17:28:18,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183848797250859 [2022-12-13 17:28:18,989 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2435 transitions. [2022-12-13 17:28:18,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2435 transitions. [2022-12-13 17:28:18,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:18,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2435 transitions. [2022-12-13 17:28:18,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.91666666666666) internal successors, (2435), 12 states have internal predecessors, (2435), 0 states have call successors, (0), 0 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 17:28:18,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 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 17:28:18,994 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 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 17:28:18,994 INFO L175 Difference]: Start difference. First operand has 341 places, 537 transitions, 13411 flow. Second operand 12 states and 2435 transitions. [2022-12-13 17:28:18,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 589 transitions, 15151 flow [2022-12-13 17:28:20,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 589 transitions, 14705 flow, removed 223 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:20,011 INFO L231 Difference]: Finished difference. Result has 353 places, 540 transitions, 13403 flow [2022-12-13 17:28:20,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=13031, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13403, PETRI_PLACES=353, PETRI_TRANSITIONS=540} [2022-12-13 17:28:20,012 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 324 predicate places. [2022-12-13 17:28:20,012 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 540 transitions, 13403 flow [2022-12-13 17:28:20,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 199.125) internal successors, (3186), 16 states have internal predecessors, (3186), 0 states have call successors, (0), 0 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 17:28:20,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:20,012 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:20,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 17:28:20,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 17:28:20,213 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash 887343481, now seen corresponding path program 33 times [2022-12-13 17:28:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393120697] [2022-12-13 17:28:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:20,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:20,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393120697] [2022-12-13 17:28:20,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393120697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:20,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646120455] [2022-12-13 17:28:20,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:28:20,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:20,550 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:20,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 17:28:20,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:28:20,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:20,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:20,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646120455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:20,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:20,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 17:28:20,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453031562] [2022-12-13 17:28:20,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:20,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:28:20,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:28:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:28:21,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:21,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 540 transitions, 13403 flow. Second operand has 19 states, 19 states have (on average 198.78947368421052) internal successors, (3777), 19 states have internal predecessors, (3777), 0 states have call successors, (0), 0 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 17:28:21,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:21,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:21,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:22,237 INFO L130 PetriNetUnfolder]: 1450/2936 cut-off events. [2022-12-13 17:28:22,237 INFO L131 PetriNetUnfolder]: For 162819/162821 co-relation queries the response was YES. [2022-12-13 17:28:22,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33961 conditions, 2936 events. 1450/2936 cut-off events. For 162819/162821 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 21405 event pairs, 141 based on Foata normal form. 3/2934 useless extension candidates. Maximal degree in co-relation 33826. Up to 2451 conditions per place. [2022-12-13 17:28:22,271 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 467 selfloop transitions, 103 changer transitions 5/585 dead transitions. [2022-12-13 17:28:22,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 585 transitions, 14954 flow [2022-12-13 17:28:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:28:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:28:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1840 transitions. [2022-12-13 17:28:22,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4215349369988545 [2022-12-13 17:28:22,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1840 transitions. [2022-12-13 17:28:22,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1840 transitions. [2022-12-13 17:28:22,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:22,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1840 transitions. [2022-12-13 17:28:22,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 204.44444444444446) internal successors, (1840), 9 states have internal predecessors, (1840), 0 states have call successors, (0), 0 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 17:28:22,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:22,276 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:22,276 INFO L175 Difference]: Start difference. First operand has 353 places, 540 transitions, 13403 flow. Second operand 9 states and 1840 transitions. [2022-12-13 17:28:22,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 585 transitions, 14954 flow [2022-12-13 17:28:23,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 585 transitions, 14585 flow, removed 156 selfloop flow, removed 4 redundant places. [2022-12-13 17:28:23,225 INFO L231 Difference]: Finished difference. Result has 358 places, 542 transitions, 13388 flow [2022-12-13 17:28:23,225 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=13046, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13388, PETRI_PLACES=358, PETRI_TRANSITIONS=542} [2022-12-13 17:28:23,225 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 329 predicate places. [2022-12-13 17:28:23,225 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 542 transitions, 13388 flow [2022-12-13 17:28:23,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 198.78947368421052) internal successors, (3777), 19 states have internal predecessors, (3777), 0 states have call successors, (0), 0 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 17:28:23,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:23,226 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:23,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:23,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:23,427 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2001755315, now seen corresponding path program 34 times [2022-12-13 17:28:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:23,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936408876] [2022-12-13 17:28:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:23,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:23,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936408876] [2022-12-13 17:28:23,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936408876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:23,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096064419] [2022-12-13 17:28:23,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:28:23,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:23,771 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:23,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 17:28:23,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:28:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:23,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096064419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:24,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:24,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 17:28:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183703496] [2022-12-13 17:28:24,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:24,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:28:24,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:28:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:28:24,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:24,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 542 transitions, 13388 flow. Second operand has 18 states, 18 states have (on average 199.0) internal successors, (3582), 18 states have internal predecessors, (3582), 0 states have call successors, (0), 0 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 17:28:24,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:24,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:25,922 INFO L130 PetriNetUnfolder]: 1441/2908 cut-off events. [2022-12-13 17:28:25,923 INFO L131 PetriNetUnfolder]: For 168032/168034 co-relation queries the response was YES. [2022-12-13 17:28:25,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33494 conditions, 2908 events. 1441/2908 cut-off events. For 168032/168034 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 21043 event pairs, 136 based on Foata normal form. 4/2907 useless extension candidates. Maximal degree in co-relation 33357. Up to 2523 conditions per place. [2022-12-13 17:28:25,954 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 478 selfloop transitions, 95 changer transitions 5/588 dead transitions. [2022-12-13 17:28:25,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 588 transitions, 14917 flow [2022-12-13 17:28:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:28:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:28:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2236 transitions. [2022-12-13 17:28:25,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41911902530459233 [2022-12-13 17:28:25,956 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2236 transitions. [2022-12-13 17:28:25,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2236 transitions. [2022-12-13 17:28:25,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:25,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2236 transitions. [2022-12-13 17:28:25,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.27272727272728) internal successors, (2236), 11 states have internal predecessors, (2236), 0 states have call successors, (0), 0 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 17:28:25,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:25,960 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:25,960 INFO L175 Difference]: Start difference. First operand has 358 places, 542 transitions, 13388 flow. Second operand 11 states and 2236 transitions. [2022-12-13 17:28:25,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 588 transitions, 14917 flow [2022-12-13 17:28:26,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 588 transitions, 14586 flow, removed 47 selfloop flow, removed 7 redundant places. [2022-12-13 17:28:26,966 INFO L231 Difference]: Finished difference. Result has 363 places, 548 transitions, 13437 flow [2022-12-13 17:28:26,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=13063, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13437, PETRI_PLACES=363, PETRI_TRANSITIONS=548} [2022-12-13 17:28:26,967 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 334 predicate places. [2022-12-13 17:28:26,967 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 548 transitions, 13437 flow [2022-12-13 17:28:26,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 199.0) internal successors, (3582), 18 states have internal predecessors, (3582), 0 states have call successors, (0), 0 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 17:28:26,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:26,968 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:26,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 17:28:27,169 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1955516419, now seen corresponding path program 35 times [2022-12-13 17:28:27,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:27,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242383310] [2022-12-13 17:28:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:27,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242383310] [2022-12-13 17:28:27,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242383310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:27,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539940909] [2022-12-13 17:28:27,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:28:27,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:27,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:27,477 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:27,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 17:28:27,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:28:27,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539940909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:27,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:27,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-12-13 17:28:27,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739578169] [2022-12-13 17:28:27,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:27,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:28:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:28:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:28:28,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:28,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 548 transitions, 13437 flow. Second operand has 17 states, 17 states have (on average 199.23529411764707) internal successors, (3387), 17 states have internal predecessors, (3387), 0 states have call successors, (0), 0 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 17:28:28,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:28,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:28,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:29,337 INFO L130 PetriNetUnfolder]: 1461/2958 cut-off events. [2022-12-13 17:28:29,337 INFO L131 PetriNetUnfolder]: For 169092/169094 co-relation queries the response was YES. [2022-12-13 17:28:29,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34152 conditions, 2958 events. 1461/2958 cut-off events. For 169092/169094 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 21526 event pairs, 170 based on Foata normal form. 4/2957 useless extension candidates. Maximal degree in co-relation 34014. Up to 2749 conditions per place. [2022-12-13 17:28:29,370 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 509 selfloop transitions, 69 changer transitions 6/594 dead transitions. [2022-12-13 17:28:29,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 594 transitions, 15204 flow [2022-12-13 17:28:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:28:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:28:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1826 transitions. [2022-12-13 17:28:29,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41832760595647195 [2022-12-13 17:28:29,372 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1826 transitions. [2022-12-13 17:28:29,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1826 transitions. [2022-12-13 17:28:29,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:29,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1826 transitions. [2022-12-13 17:28:29,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.88888888888889) internal successors, (1826), 9 states have internal predecessors, (1826), 0 states have call successors, (0), 0 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 17:28:29,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:29,375 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:29,375 INFO L175 Difference]: Start difference. First operand has 363 places, 548 transitions, 13437 flow. Second operand 9 states and 1826 transitions. [2022-12-13 17:28:29,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 594 transitions, 15204 flow [2022-12-13 17:28:30,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 594 transitions, 14996 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-12-13 17:28:30,391 INFO L231 Difference]: Finished difference. Result has 366 places, 566 transitions, 13896 flow [2022-12-13 17:28:30,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=13233, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13896, PETRI_PLACES=366, PETRI_TRANSITIONS=566} [2022-12-13 17:28:30,392 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 337 predicate places. [2022-12-13 17:28:30,392 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 566 transitions, 13896 flow [2022-12-13 17:28:30,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 199.23529411764707) internal successors, (3387), 17 states have internal predecessors, (3387), 0 states have call successors, (0), 0 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 17:28:30,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:30,392 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:30,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 17:28:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:30,594 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1293058329, now seen corresponding path program 36 times [2022-12-13 17:28:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:30,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882146079] [2022-12-13 17:28:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:30,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882146079] [2022-12-13 17:28:30,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882146079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258399362] [2022-12-13 17:28:30,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:28:30,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:30,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:30,871 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:30,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 17:28:30,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:28:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:30,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:31,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:31,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258399362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:31,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:31,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-12-13 17:28:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752695673] [2022-12-13 17:28:31,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:31,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:28:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:28:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:28:31,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:31,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 566 transitions, 13896 flow. Second operand has 18 states, 18 states have (on average 199.11111111111111) internal successors, (3584), 18 states have internal predecessors, (3584), 0 states have call successors, (0), 0 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 17:28:31,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:31,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:31,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:32,759 INFO L130 PetriNetUnfolder]: 1515/3068 cut-off events. [2022-12-13 17:28:32,759 INFO L131 PetriNetUnfolder]: For 176448/176450 co-relation queries the response was YES. [2022-12-13 17:28:32,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35329 conditions, 3068 events. 1515/3068 cut-off events. For 176448/176450 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 22499 event pairs, 165 based on Foata normal form. 4/3067 useless extension candidates. Maximal degree in co-relation 35188. Up to 2768 conditions per place. [2022-12-13 17:28:32,792 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 512 selfloop transitions, 89 changer transitions 6/617 dead transitions. [2022-12-13 17:28:32,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 617 transitions, 15783 flow [2022-12-13 17:28:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:28:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:28:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1632 transitions. [2022-12-13 17:28:32,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42061855670103093 [2022-12-13 17:28:32,794 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1632 transitions. [2022-12-13 17:28:32,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1632 transitions. [2022-12-13 17:28:32,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:32,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1632 transitions. [2022-12-13 17:28:32,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 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 17:28:32,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:28:32,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:28:32,797 INFO L175 Difference]: Start difference. First operand has 366 places, 566 transitions, 13896 flow. Second operand 8 states and 1632 transitions. [2022-12-13 17:28:32,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 617 transitions, 15783 flow [2022-12-13 17:28:33,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 617 transitions, 15468 flow, removed 112 selfloop flow, removed 5 redundant places. [2022-12-13 17:28:33,813 INFO L231 Difference]: Finished difference. Result has 370 places, 585 transitions, 14346 flow [2022-12-13 17:28:33,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=13587, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14346, PETRI_PLACES=370, PETRI_TRANSITIONS=585} [2022-12-13 17:28:33,814 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 341 predicate places. [2022-12-13 17:28:33,814 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 585 transitions, 14346 flow [2022-12-13 17:28:33,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 199.11111111111111) internal successors, (3584), 18 states have internal predecessors, (3584), 0 states have call successors, (0), 0 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 17:28:33,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:33,814 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:33,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 17:28:34,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:34,016 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1469872719, now seen corresponding path program 37 times [2022-12-13 17:28:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902207202] [2022-12-13 17:28:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902207202] [2022-12-13 17:28:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902207202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332424816] [2022-12-13 17:28:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:28:34,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:34,319 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 17:28:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:34,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:34,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:34,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332424816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:34,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:34,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-12-13 17:28:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178563977] [2022-12-13 17:28:34,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:34,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:28:34,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:28:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:28:34,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:35,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 585 transitions, 14346 flow. Second operand has 18 states, 18 states have (on average 199.16666666666666) internal successors, (3585), 18 states have internal predecessors, (3585), 0 states have call successors, (0), 0 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 17:28:35,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:35,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:36,367 INFO L130 PetriNetUnfolder]: 1503/3032 cut-off events. [2022-12-13 17:28:36,368 INFO L131 PetriNetUnfolder]: For 178818/178820 co-relation queries the response was YES. [2022-12-13 17:28:36,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35099 conditions, 3032 events. 1503/3032 cut-off events. For 178818/178820 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22058 event pairs, 164 based on Foata normal form. 4/3031 useless extension candidates. Maximal degree in co-relation 34956. Up to 2768 conditions per place. [2022-12-13 17:28:36,402 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 510 selfloop transitions, 88 changer transitions 7/615 dead transitions. [2022-12-13 17:28:36,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 615 transitions, 15760 flow [2022-12-13 17:28:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:28:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:28:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1829 transitions. [2022-12-13 17:28:36,403 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41901489117983964 [2022-12-13 17:28:36,403 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1829 transitions. [2022-12-13 17:28:36,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1829 transitions. [2022-12-13 17:28:36,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:36,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1829 transitions. [2022-12-13 17:28:36,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 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 17:28:36,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:36,407 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:36,407 INFO L175 Difference]: Start difference. First operand has 370 places, 585 transitions, 14346 flow. Second operand 9 states and 1829 transitions. [2022-12-13 17:28:36,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 615 transitions, 15760 flow [2022-12-13 17:28:37,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 615 transitions, 15486 flow, removed 71 selfloop flow, removed 5 redundant places. [2022-12-13 17:28:37,472 INFO L231 Difference]: Finished difference. Result has 375 places, 586 transitions, 14362 flow [2022-12-13 17:28:37,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=14106, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14362, PETRI_PLACES=375, PETRI_TRANSITIONS=586} [2022-12-13 17:28:37,472 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2022-12-13 17:28:37,472 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 586 transitions, 14362 flow [2022-12-13 17:28:37,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 199.16666666666666) internal successors, (3585), 18 states have internal predecessors, (3585), 0 states have call successors, (0), 0 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 17:28:37,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:37,473 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:37,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 17:28:37,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:37,674 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash -542864635, now seen corresponding path program 38 times [2022-12-13 17:28:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:37,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954049183] [2022-12-13 17:28:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:37,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954049183] [2022-12-13 17:28:37,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954049183] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:37,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833901054] [2022-12-13 17:28:37,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:28:37,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:37,996 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:37,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 17:28:38,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:38,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:38,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:38,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833901054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:38,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:38,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 17:28:38,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357291269] [2022-12-13 17:28:38,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:38,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:28:38,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:28:38,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:28:38,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:38,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 586 transitions, 14362 flow. Second operand has 16 states, 16 states have (on average 199.25) internal successors, (3188), 16 states have internal predecessors, (3188), 0 states have call successors, (0), 0 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 17:28:38,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:38,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:38,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:40,140 INFO L130 PetriNetUnfolder]: 1662/3380 cut-off events. [2022-12-13 17:28:40,140 INFO L131 PetriNetUnfolder]: For 193408/193410 co-relation queries the response was YES. [2022-12-13 17:28:40,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38615 conditions, 3380 events. 1662/3380 cut-off events. For 193408/193410 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 25422 event pairs, 175 based on Foata normal form. 11/3386 useless extension candidates. Maximal degree in co-relation 38470. Up to 2900 conditions per place. [2022-12-13 17:28:40,175 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 575 selfloop transitions, 118 changer transitions 24/727 dead transitions. [2022-12-13 17:28:40,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 727 transitions, 18255 flow [2022-12-13 17:28:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:28:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:28:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2444 transitions. [2022-12-13 17:28:40,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41993127147766324 [2022-12-13 17:28:40,177 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2444 transitions. [2022-12-13 17:28:40,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2444 transitions. [2022-12-13 17:28:40,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:40,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2444 transitions. [2022-12-13 17:28:40,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.66666666666666) internal successors, (2444), 12 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 17:28:40,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 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 17:28:40,181 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 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 17:28:40,181 INFO L175 Difference]: Start difference. First operand has 375 places, 586 transitions, 14362 flow. Second operand 12 states and 2444 transitions. [2022-12-13 17:28:40,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 727 transitions, 18255 flow [2022-12-13 17:28:41,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 727 transitions, 18081 flow, removed 20 selfloop flow, removed 6 redundant places. [2022-12-13 17:28:41,283 INFO L231 Difference]: Finished difference. Result has 389 places, 655 transitions, 16276 flow [2022-12-13 17:28:41,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=14198, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16276, PETRI_PLACES=389, PETRI_TRANSITIONS=655} [2022-12-13 17:28:41,284 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 360 predicate places. [2022-12-13 17:28:41,284 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 655 transitions, 16276 flow [2022-12-13 17:28:41,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 199.25) internal successors, (3188), 16 states have internal predecessors, (3188), 0 states have call successors, (0), 0 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 17:28:41,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:41,285 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:41,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:41,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:41,486 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1589257183, now seen corresponding path program 39 times [2022-12-13 17:28:41,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:41,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285392358] [2022-12-13 17:28:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:41,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:41,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285392358] [2022-12-13 17:28:41,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285392358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975012370] [2022-12-13 17:28:41,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:28:41,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:41,852 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:41,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 17:28:41,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:28:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:42,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:42,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975012370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:42,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:42,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 17:28:42,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513056910] [2022-12-13 17:28:42,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:42,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:28:42,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:28:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:28:42,551 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:42,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 655 transitions, 16276 flow. Second operand has 20 states, 20 states have (on average 198.9) internal successors, (3978), 20 states have internal predecessors, (3978), 0 states have call successors, (0), 0 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 17:28:42,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:42,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:42,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:44,077 INFO L130 PetriNetUnfolder]: 1690/3415 cut-off events. [2022-12-13 17:28:44,077 INFO L131 PetriNetUnfolder]: For 213524/213526 co-relation queries the response was YES. [2022-12-13 17:28:44,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40499 conditions, 3415 events. 1690/3415 cut-off events. For 213524/213526 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 25577 event pairs, 179 based on Foata normal form. 6/3416 useless extension candidates. Maximal degree in co-relation 40345. Up to 2908 conditions per place. [2022-12-13 17:28:44,118 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 579 selfloop transitions, 118 changer transitions 14/721 dead transitions. [2022-12-13 17:28:44,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 721 transitions, 18865 flow [2022-12-13 17:28:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:28:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:28:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2239 transitions. [2022-12-13 17:28:44,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4196813495782568 [2022-12-13 17:28:44,120 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2239 transitions. [2022-12-13 17:28:44,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2239 transitions. [2022-12-13 17:28:44,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:44,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2239 transitions. [2022-12-13 17:28:44,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 203.54545454545453) internal successors, (2239), 11 states have internal predecessors, (2239), 0 states have call successors, (0), 0 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 17:28:44,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:44,124 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:44,124 INFO L175 Difference]: Start difference. First operand has 389 places, 655 transitions, 16276 flow. Second operand 11 states and 2239 transitions. [2022-12-13 17:28:44,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 721 transitions, 18865 flow [2022-12-13 17:28:45,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 721 transitions, 18381 flow, removed 242 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:45,630 INFO L231 Difference]: Finished difference. Result has 400 places, 666 transitions, 16611 flow [2022-12-13 17:28:45,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=15810, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16611, PETRI_PLACES=400, PETRI_TRANSITIONS=666} [2022-12-13 17:28:45,631 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 371 predicate places. [2022-12-13 17:28:45,631 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 666 transitions, 16611 flow [2022-12-13 17:28:45,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 198.9) internal successors, (3978), 20 states have internal predecessors, (3978), 0 states have call successors, (0), 0 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 17:28:45,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:45,632 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:45,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:45,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-13 17:28:45,833 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:45,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1504612933, now seen corresponding path program 40 times [2022-12-13 17:28:45,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:45,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603495935] [2022-12-13 17:28:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:45,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603495935] [2022-12-13 17:28:46,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603495935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457819696] [2022-12-13 17:28:46,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:28:46,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:46,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:46,133 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:46,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 17:28:46,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:28:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:46,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:46,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457819696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:46,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:46,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-12-13 17:28:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109855330] [2022-12-13 17:28:46,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:28:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:28:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:28:46,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:46,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 666 transitions, 16611 flow. Second operand has 17 states, 17 states have (on average 199.11764705882354) internal successors, (3385), 17 states have internal predecessors, (3385), 0 states have call successors, (0), 0 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 17:28:46,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:46,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:46,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:48,412 INFO L130 PetriNetUnfolder]: 1732/3496 cut-off events. [2022-12-13 17:28:48,412 INFO L131 PetriNetUnfolder]: For 222981/222983 co-relation queries the response was YES. [2022-12-13 17:28:48,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41792 conditions, 3496 events. 1732/3496 cut-off events. For 222981/222983 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 26223 event pairs, 179 based on Foata normal form. 5/3496 useless extension candidates. Maximal degree in co-relation 41634. Up to 3216 conditions per place. [2022-12-13 17:28:48,453 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 625 selfloop transitions, 77 changer transitions 6/718 dead transitions. [2022-12-13 17:28:48,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 718 transitions, 18874 flow [2022-12-13 17:28:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:28:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:28:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1827 transitions. [2022-12-13 17:28:48,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41855670103092785 [2022-12-13 17:28:48,455 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1827 transitions. [2022-12-13 17:28:48,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1827 transitions. [2022-12-13 17:28:48,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:48,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1827 transitions. [2022-12-13 17:28:48,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.0) internal successors, (1827), 9 states have internal predecessors, (1827), 0 states have call successors, (0), 0 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 17:28:48,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:48,458 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:48,458 INFO L175 Difference]: Start difference. First operand has 400 places, 666 transitions, 16611 flow. Second operand 9 states and 1827 transitions. [2022-12-13 17:28:48,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 718 transitions, 18874 flow [2022-12-13 17:28:49,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 718 transitions, 18383 flow, removed 165 selfloop flow, removed 6 redundant places. [2022-12-13 17:28:49,895 INFO L231 Difference]: Finished difference. Result has 404 places, 688 transitions, 17032 flow [2022-12-13 17:28:49,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=16128, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17032, PETRI_PLACES=404, PETRI_TRANSITIONS=688} [2022-12-13 17:28:49,896 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 375 predicate places. [2022-12-13 17:28:49,896 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 688 transitions, 17032 flow [2022-12-13 17:28:49,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 199.11764705882354) internal successors, (3385), 17 states have internal predecessors, (3385), 0 states have call successors, (0), 0 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 17:28:49,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:49,896 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:49,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:50,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:50,098 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash 644254487, now seen corresponding path program 41 times [2022-12-13 17:28:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336732785] [2022-12-13 17:28:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:50,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336732785] [2022-12-13 17:28:50,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336732785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827436844] [2022-12-13 17:28:50,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:28:50,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:50,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:50,407 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:50,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 17:28:50,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:50,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:50,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827436844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:50,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:50,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 17:28:50,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439963081] [2022-12-13 17:28:50,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:28:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:28:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:28:50,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:50,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 688 transitions, 17032 flow. Second operand has 16 states, 16 states have (on average 199.25) internal successors, (3188), 16 states have internal predecessors, (3188), 0 states have call successors, (0), 0 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 17:28:50,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:50,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:50,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:52,778 INFO L130 PetriNetUnfolder]: 1718/3454 cut-off events. [2022-12-13 17:28:52,778 INFO L131 PetriNetUnfolder]: For 211313/211315 co-relation queries the response was YES. [2022-12-13 17:28:52,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40763 conditions, 3454 events. 1718/3454 cut-off events. For 211313/211315 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 25729 event pairs, 191 based on Foata normal form. 3/3452 useless extension candidates. Maximal degree in co-relation 40603. Up to 3170 conditions per place. [2022-12-13 17:28:52,816 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 627 selfloop transitions, 92 changer transitions 5/734 dead transitions. [2022-12-13 17:28:52,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 734 transitions, 18940 flow [2022-12-13 17:28:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:28:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 17:28:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2231 transitions. [2022-12-13 17:28:52,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2022-12-13 17:28:52,818 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2231 transitions. [2022-12-13 17:28:52,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2231 transitions. [2022-12-13 17:28:52,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:52,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2231 transitions. [2022-12-13 17:28:52,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 202.8181818181818) internal successors, (2231), 11 states have internal predecessors, (2231), 0 states have call successors, (0), 0 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 17:28:52,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:52,822 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 485.0) internal successors, (5820), 12 states have internal predecessors, (5820), 0 states have call successors, (0), 0 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 17:28:52,822 INFO L175 Difference]: Start difference. First operand has 404 places, 688 transitions, 17032 flow. Second operand 11 states and 2231 transitions. [2022-12-13 17:28:52,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 734 transitions, 18940 flow [2022-12-13 17:28:54,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 734 transitions, 18529 flow, removed 156 selfloop flow, removed 5 redundant places. [2022-12-13 17:28:54,311 INFO L231 Difference]: Finished difference. Result has 411 places, 698 transitions, 17125 flow [2022-12-13 17:28:54,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=16627, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17125, PETRI_PLACES=411, PETRI_TRANSITIONS=698} [2022-12-13 17:28:54,312 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 382 predicate places. [2022-12-13 17:28:54,312 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 698 transitions, 17125 flow [2022-12-13 17:28:54,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 199.25) internal successors, (3188), 16 states have internal predecessors, (3188), 0 states have call successors, (0), 0 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 17:28:54,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:54,312 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:54,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 17:28:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 17:28:54,513 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1412442793, now seen corresponding path program 42 times [2022-12-13 17:28:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:54,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222653796] [2022-12-13 17:28:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:54,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:54,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222653796] [2022-12-13 17:28:54,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222653796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:54,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165902492] [2022-12-13 17:28:54,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:28:54,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:54,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:54,817 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:54,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 17:28:54,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:28:54,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:54,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:54,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:54,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165902492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:55,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 17:28:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871160915] [2022-12-13 17:28:55,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:28:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:28:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:28:55,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:55,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 698 transitions, 17125 flow. Second operand has 20 states, 20 states have (on average 199.0) internal successors, (3980), 20 states have internal predecessors, (3980), 0 states have call successors, (0), 0 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 17:28:55,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:55,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:55,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:56,860 INFO L130 PetriNetUnfolder]: 1715/3433 cut-off events. [2022-12-13 17:28:56,860 INFO L131 PetriNetUnfolder]: For 215115/215117 co-relation queries the response was YES. [2022-12-13 17:28:56,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40386 conditions, 3433 events. 1715/3433 cut-off events. For 215115/215117 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 25439 event pairs, 192 based on Foata normal form. 3/3431 useless extension candidates. Maximal degree in co-relation 40224. Up to 3009 conditions per place. [2022-12-13 17:28:56,903 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 598 selfloop transitions, 120 changer transitions 5/733 dead transitions. [2022-12-13 17:28:56,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 733 transitions, 18904 flow [2022-12-13 17:28:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:28:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:28:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1835 transitions. [2022-12-13 17:28:56,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42038946162657503 [2022-12-13 17:28:56,905 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1835 transitions. [2022-12-13 17:28:56,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1835 transitions. [2022-12-13 17:28:56,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:56,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1835 transitions. [2022-12-13 17:28:56,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.88888888888889) internal successors, (1835), 9 states have internal predecessors, (1835), 0 states have call successors, (0), 0 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 17:28:56,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:56,908 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:28:56,908 INFO L175 Difference]: Start difference. First operand has 411 places, 698 transitions, 17125 flow. Second operand 9 states and 1835 transitions. [2022-12-13 17:28:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 733 transitions, 18904 flow [2022-12-13 17:28:58,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 733 transitions, 18588 flow, removed 102 selfloop flow, removed 6 redundant places. [2022-12-13 17:28:58,453 INFO L231 Difference]: Finished difference. Result has 415 places, 700 transitions, 17207 flow [2022-12-13 17:28:58,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=16815, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17207, PETRI_PLACES=415, PETRI_TRANSITIONS=700} [2022-12-13 17:28:58,454 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 386 predicate places. [2022-12-13 17:28:58,454 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 700 transitions, 17207 flow [2022-12-13 17:28:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 199.0) internal successors, (3980), 20 states have internal predecessors, (3980), 0 states have call successors, (0), 0 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 17:28:58,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:58,454 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:58,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 17:28:58,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 17:28:58,656 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:28:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1560856313, now seen corresponding path program 43 times [2022-12-13 17:28:58,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:58,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887122463] [2022-12-13 17:28:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:58,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887122463] [2022-12-13 17:28:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887122463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343001228] [2022-12-13 17:28:58,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:28:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:58,938 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:58,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 17:28:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:59,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:28:59,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:59,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:59,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343001228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:59,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:59,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2022-12-13 17:28:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217274453] [2022-12-13 17:28:59,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:59,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:28:59,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:28:59,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:28:59,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:28:59,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 700 transitions, 17207 flow. Second operand has 19 states, 19 states have (on average 199.0) internal successors, (3781), 19 states have internal predecessors, (3781), 0 states have call successors, (0), 0 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 17:28:59,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:59,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:28:59,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:01,241 INFO L130 PetriNetUnfolder]: 1783/3581 cut-off events. [2022-12-13 17:29:01,241 INFO L131 PetriNetUnfolder]: For 232433/232435 co-relation queries the response was YES. [2022-12-13 17:29:01,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42090 conditions, 3581 events. 1783/3581 cut-off events. For 232433/232435 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26881 event pairs, 179 based on Foata normal form. 5/3581 useless extension candidates. Maximal degree in co-relation 41926. Up to 3200 conditions per place. [2022-12-13 17:29:01,285 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 645 selfloop transitions, 101 changer transitions 7/763 dead transitions. [2022-12-13 17:29:01,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 763 transitions, 19668 flow [2022-12-13 17:29:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:29:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:29:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1834 transitions. [2022-12-13 17:29:01,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42016036655211914 [2022-12-13 17:29:01,287 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1834 transitions. [2022-12-13 17:29:01,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1834 transitions. [2022-12-13 17:29:01,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:01,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1834 transitions. [2022-12-13 17:29:01,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 203.77777777777777) internal successors, (1834), 9 states have internal predecessors, (1834), 0 states have call successors, (0), 0 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 17:29:01,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:29:01,290 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:29:01,290 INFO L175 Difference]: Start difference. First operand has 415 places, 700 transitions, 17207 flow. Second operand 9 states and 1834 transitions. [2022-12-13 17:29:01,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 763 transitions, 19668 flow [2022-12-13 17:29:02,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 763 transitions, 19340 flow, removed 52 selfloop flow, removed 7 redundant places. [2022-12-13 17:29:02,987 INFO L231 Difference]: Finished difference. Result has 418 places, 724 transitions, 17801 flow [2022-12-13 17:29:02,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=16885, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17801, PETRI_PLACES=418, PETRI_TRANSITIONS=724} [2022-12-13 17:29:02,987 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 389 predicate places. [2022-12-13 17:29:02,987 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 724 transitions, 17801 flow [2022-12-13 17:29:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 199.0) internal successors, (3781), 19 states have internal predecessors, (3781), 0 states have call successors, (0), 0 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 17:29:02,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:02,988 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:02,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 17:29:03,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 17:29:03,189 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1622513369, now seen corresponding path program 44 times [2022-12-13 17:29:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621560842] [2022-12-13 17:29:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:03,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621560842] [2022-12-13 17:29:03,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621560842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424126363] [2022-12-13 17:29:03,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:29:03,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:03,470 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:03,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 17:29:03,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:29:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:03,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 17:29:03,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:03,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424126363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:03,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2022-12-13 17:29:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139480929] [2022-12-13 17:29:03,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:03,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:29:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:29:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:29:04,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 485 [2022-12-13 17:29:04,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 724 transitions, 17801 flow. Second operand has 19 states, 19 states have (on average 199.10526315789474) internal successors, (3783), 19 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 17:29:04,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:04,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 485 [2022-12-13 17:29:04,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:05,678 INFO L130 PetriNetUnfolder]: 1767/3531 cut-off events. [2022-12-13 17:29:05,678 INFO L131 PetriNetUnfolder]: For 228927/228929 co-relation queries the response was YES. [2022-12-13 17:29:05,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41610 conditions, 3531 events. 1767/3531 cut-off events. For 228927/228929 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26269 event pairs, 180 based on Foata normal form. 5/3531 useless extension candidates. Maximal degree in co-relation 41444. Up to 3200 conditions per place. [2022-12-13 17:29:05,721 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 640 selfloop transitions, 99 changer transitions 7/756 dead transitions. [2022-12-13 17:29:05,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 756 transitions, 19566 flow [2022-12-13 17:29:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:29:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:29:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1631 transitions. [2022-12-13 17:29:05,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42036082474226805 [2022-12-13 17:29:05,722 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1631 transitions. [2022-12-13 17:29:05,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1631 transitions. [2022-12-13 17:29:05,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:05,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1631 transitions. [2022-12-13 17:29:05,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 203.875) internal successors, (1631), 8 states have internal predecessors, (1631), 0 states have call successors, (0), 0 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 17:29:05,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:29:05,725 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 485.0) internal successors, (4365), 9 states have internal predecessors, (4365), 0 states have call successors, (0), 0 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 17:29:05,725 INFO L175 Difference]: Start difference. First operand has 418 places, 724 transitions, 17801 flow. Second operand 8 states and 1631 transitions. [2022-12-13 17:29:05,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 756 transitions, 19566 flow [2022-12-13 17:29:07,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 756 transitions, 19343 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-12-13 17:29:07,419 INFO L231 Difference]: Finished difference. Result has 421 places, 726 transitions, 17938 flow [2022-12-13 17:29:07,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=17590, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17938, PETRI_PLACES=421, PETRI_TRANSITIONS=726} [2022-12-13 17:29:07,419 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 392 predicate places. [2022-12-13 17:29:07,419 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 726 transitions, 17938 flow [2022-12-13 17:29:07,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 199.10526315789474) internal successors, (3783), 19 states have internal predecessors, (3783), 0 states have call successors, (0), 0 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 17:29:07,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:07,420 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:07,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-13 17:29:07,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 17:29:07,621 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1533681344, now seen corresponding path program 45 times [2022-12-13 17:29:07,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541790183] [2022-12-13 17:29:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:07,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541790183] [2022-12-13 17:29:07,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541790183] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936046418] [2022-12-13 17:29:07,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:29:07,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:07,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:07,713 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:07,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 17:29:07,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:29:07,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:07,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:07,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936046418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:07,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:07,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 17:29:07,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512109221] [2022-12-13 17:29:07,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:07,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:29:07,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:29:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:29:07,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:07,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 726 transitions, 17938 flow. Second operand has 14 states, 14 states have (on average 207.14285714285714) internal successors, (2900), 14 states have internal predecessors, (2900), 0 states have call successors, (0), 0 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 17:29:07,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:07,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:09,938 INFO L130 PetriNetUnfolder]: 2340/4687 cut-off events. [2022-12-13 17:29:09,939 INFO L131 PetriNetUnfolder]: For 325524/325524 co-relation queries the response was YES. [2022-12-13 17:29:09,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55103 conditions, 4687 events. 2340/4687 cut-off events. For 325524/325524 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 36510 event pairs, 264 based on Foata normal form. 36/4723 useless extension candidates. Maximal degree in co-relation 54935. Up to 2743 conditions per place. [2022-12-13 17:29:09,996 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 703 selfloop transitions, 280 changer transitions 0/983 dead transitions. [2022-12-13 17:29:09,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 983 transitions, 26063 flow [2022-12-13 17:29:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:29:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 17:29:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1911 transitions. [2022-12-13 17:29:09,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43780068728522337 [2022-12-13 17:29:09,998 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1911 transitions. [2022-12-13 17:29:09,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1911 transitions. [2022-12-13 17:29:09,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:09,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1911 transitions. [2022-12-13 17:29:10,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 212.33333333333334) internal successors, (1911), 9 states have internal predecessors, (1911), 0 states have call successors, (0), 0 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 17:29:10,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:29:10,001 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 485.0) internal successors, (4850), 10 states have internal predecessors, (4850), 0 states have call successors, (0), 0 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 17:29:10,002 INFO L175 Difference]: Start difference. First operand has 421 places, 726 transitions, 17938 flow. Second operand 9 states and 1911 transitions. [2022-12-13 17:29:10,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 983 transitions, 26063 flow [2022-12-13 17:29:12,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 983 transitions, 25725 flow, removed 77 selfloop flow, removed 5 redundant places. [2022-12-13 17:29:12,237 INFO L231 Difference]: Finished difference. Result has 428 places, 844 transitions, 21876 flow [2022-12-13 17:29:12,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=17703, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21876, PETRI_PLACES=428, PETRI_TRANSITIONS=844} [2022-12-13 17:29:12,237 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 399 predicate places. [2022-12-13 17:29:12,238 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 844 transitions, 21876 flow [2022-12-13 17:29:12,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 207.14285714285714) internal successors, (2900), 14 states have internal predecessors, (2900), 0 states have call successors, (0), 0 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 17:29:12,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:12,238 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:12,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:12,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-12-13 17:29:12,439 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:12,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2095776727, now seen corresponding path program 46 times [2022-12-13 17:29:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:12,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456932809] [2022-12-13 17:29:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:12,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456932809] [2022-12-13 17:29:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456932809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501601888] [2022-12-13 17:29:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:29:12,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:12,505 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:12,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 17:29:12,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:29:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:12,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:12,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501601888] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:12,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:12,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 17:29:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172898140] [2022-12-13 17:29:12,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:29:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:29:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:29:12,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:12,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 844 transitions, 21876 flow. Second operand has 14 states, 14 states have (on average 207.07142857142858) internal successors, (2899), 14 states have internal predecessors, (2899), 0 states have call successors, (0), 0 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 17:29:12,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:12,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:12,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:14,892 INFO L130 PetriNetUnfolder]: 2345/4704 cut-off events. [2022-12-13 17:29:14,892 INFO L131 PetriNetUnfolder]: For 324908/324908 co-relation queries the response was YES. [2022-12-13 17:29:14,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56341 conditions, 4704 events. 2345/4704 cut-off events. For 324908/324908 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36937 event pairs, 383 based on Foata normal form. 4/4708 useless extension candidates. Maximal degree in co-relation 56169. Up to 1803 conditions per place. [2022-12-13 17:29:14,948 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 609 selfloop transitions, 377 changer transitions 15/1001 dead transitions. [2022-12-13 17:29:14,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1001 transitions, 27402 flow [2022-12-13 17:29:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:29:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:29:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2945 transitions. [2022-12-13 17:29:14,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4337260677466863 [2022-12-13 17:29:14,951 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2945 transitions. [2022-12-13 17:29:14,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2945 transitions. [2022-12-13 17:29:14,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:14,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2945 transitions. [2022-12-13 17:29:14,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 210.35714285714286) internal successors, (2945), 14 states have internal predecessors, (2945), 0 states have call successors, (0), 0 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 17:29:14,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:29:14,955 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:29:14,955 INFO L175 Difference]: Start difference. First operand has 428 places, 844 transitions, 21876 flow. Second operand 14 states and 2945 transitions. [2022-12-13 17:29:14,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1001 transitions, 27402 flow [2022-12-13 17:29:17,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1001 transitions, 27096 flow, removed 79 selfloop flow, removed 3 redundant places. [2022-12-13 17:29:17,448 INFO L231 Difference]: Finished difference. Result has 443 places, 896 transitions, 24161 flow [2022-12-13 17:29:17,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=21572, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24161, PETRI_PLACES=443, PETRI_TRANSITIONS=896} [2022-12-13 17:29:17,449 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 414 predicate places. [2022-12-13 17:29:17,449 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 896 transitions, 24161 flow [2022-12-13 17:29:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 207.07142857142858) internal successors, (2899), 14 states have internal predecessors, (2899), 0 states have call successors, (0), 0 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 17:29:17,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:17,449 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:17,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:17,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:17,651 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1222365250, now seen corresponding path program 47 times [2022-12-13 17:29:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216126341] [2022-12-13 17:29:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:17,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216126341] [2022-12-13 17:29:17,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216126341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082161842] [2022-12-13 17:29:17,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:29:17,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:17,746 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:17,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 17:29:17,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:29:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:17,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:17,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082161842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:17,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:17,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:29:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494412378] [2022-12-13 17:29:17,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:29:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:17,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:29:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:29:17,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:17,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 896 transitions, 24161 flow. Second operand has 16 states, 16 states have (on average 207.0625) internal successors, (3313), 16 states have internal predecessors, (3313), 0 states have call successors, (0), 0 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 17:29:17,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:17,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:17,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:20,564 INFO L130 PetriNetUnfolder]: 2538/5045 cut-off events. [2022-12-13 17:29:20,564 INFO L131 PetriNetUnfolder]: For 386659/386659 co-relation queries the response was YES. [2022-12-13 17:29:20,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62383 conditions, 5045 events. 2538/5045 cut-off events. For 386659/386659 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39648 event pairs, 254 based on Foata normal form. 56/5101 useless extension candidates. Maximal degree in co-relation 62206. Up to 4166 conditions per place. [2022-12-13 17:29:20,626 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 805 selfloop transitions, 212 changer transitions 0/1017 dead transitions. [2022-12-13 17:29:20,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1017 transitions, 28855 flow [2022-12-13 17:29:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:29:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:29:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2961 transitions. [2022-12-13 17:29:20,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43608247422680413 [2022-12-13 17:29:20,629 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2961 transitions. [2022-12-13 17:29:20,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2961 transitions. [2022-12-13 17:29:20,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:20,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2961 transitions. [2022-12-13 17:29:20,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 211.5) internal successors, (2961), 14 states have internal predecessors, (2961), 0 states have call successors, (0), 0 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 17:29:20,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:29:20,634 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:29:20,634 INFO L175 Difference]: Start difference. First operand has 443 places, 896 transitions, 24161 flow. Second operand 14 states and 2961 transitions. [2022-12-13 17:29:20,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1017 transitions, 28855 flow [2022-12-13 17:29:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1017 transitions, 27695 flow, removed 314 selfloop flow, removed 9 redundant places. [2022-12-13 17:29:23,437 INFO L231 Difference]: Finished difference. Result has 450 places, 954 transitions, 25141 flow [2022-12-13 17:29:23,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=23002, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=25141, PETRI_PLACES=450, PETRI_TRANSITIONS=954} [2022-12-13 17:29:23,437 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 421 predicate places. [2022-12-13 17:29:23,437 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 954 transitions, 25141 flow [2022-12-13 17:29:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 207.0625) internal successors, (3313), 16 states have internal predecessors, (3313), 0 states have call successors, (0), 0 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 17:29:23,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:23,438 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:23,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:23,639 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1446097220, now seen corresponding path program 48 times [2022-12-13 17:29:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516233144] [2022-12-13 17:29:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:23,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516233144] [2022-12-13 17:29:23,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516233144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977010450] [2022-12-13 17:29:23,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:29:23,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:23,731 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:23,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 17:29:23,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 17:29:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:23,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:23,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:23,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977010450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:23,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:23,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:29:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912345457] [2022-12-13 17:29:23,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:29:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:29:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:29:23,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:23,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 954 transitions, 25141 flow. Second operand has 15 states, 15 states have (on average 206.8) internal successors, (3102), 15 states have internal predecessors, (3102), 0 states have call successors, (0), 0 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 17:29:23,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:23,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:23,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:26,966 INFO L130 PetriNetUnfolder]: 2769/5514 cut-off events. [2022-12-13 17:29:26,966 INFO L131 PetriNetUnfolder]: For 440309/440309 co-relation queries the response was YES. [2022-12-13 17:29:27,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70704 conditions, 5514 events. 2769/5514 cut-off events. For 440309/440309 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 44136 event pairs, 46 based on Foata normal form. 24/5538 useless extension candidates. Maximal degree in co-relation 70524. Up to 1478 conditions per place. [2022-12-13 17:29:27,036 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 615 selfloop transitions, 514 changer transitions 4/1133 dead transitions. [2022-12-13 17:29:27,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1133 transitions, 32330 flow [2022-12-13 17:29:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 17:29:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 17:29:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6311 transitions. [2022-12-13 17:29:27,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43374570446735394 [2022-12-13 17:29:27,040 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6311 transitions. [2022-12-13 17:29:27,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6311 transitions. [2022-12-13 17:29:27,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:27,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6311 transitions. [2022-12-13 17:29:27,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 210.36666666666667) internal successors, (6311), 30 states have internal predecessors, (6311), 0 states have call successors, (0), 0 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 17:29:27,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 485.0) internal successors, (15035), 31 states have internal predecessors, (15035), 0 states have call successors, (0), 0 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 17:29:27,050 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 485.0) internal successors, (15035), 31 states have internal predecessors, (15035), 0 states have call successors, (0), 0 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 17:29:27,051 INFO L175 Difference]: Start difference. First operand has 450 places, 954 transitions, 25141 flow. Second operand 30 states and 6311 transitions. [2022-12-13 17:29:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1133 transitions, 32330 flow [2022-12-13 17:29:30,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1133 transitions, 31741 flow, removed 213 selfloop flow, removed 4 redundant places. [2022-12-13 17:29:30,625 INFO L231 Difference]: Finished difference. Result has 486 places, 1041 transitions, 30086 flow [2022-12-13 17:29:30,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=24612, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=30086, PETRI_PLACES=486, PETRI_TRANSITIONS=1041} [2022-12-13 17:29:30,625 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 457 predicate places. [2022-12-13 17:29:30,626 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1041 transitions, 30086 flow [2022-12-13 17:29:30,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.8) internal successors, (3102), 15 states have internal predecessors, (3102), 0 states have call successors, (0), 0 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 17:29:30,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:30,626 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:30,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-13 17:29:30,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-13 17:29:30,827 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1941364129, now seen corresponding path program 49 times [2022-12-13 17:29:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:30,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705714668] [2022-12-13 17:29:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:30,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705714668] [2022-12-13 17:29:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705714668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005596946] [2022-12-13 17:29:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:29:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:30,912 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:30,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 17:29:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:31,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:31,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005596946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:31,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:31,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:29:31,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107226077] [2022-12-13 17:29:31,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:31,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:29:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:29:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:29:31,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:31,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1041 transitions, 30086 flow. Second operand has 16 states, 16 states have (on average 207.0) internal successors, (3312), 16 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 17:29:31,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:31,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:31,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:34,416 INFO L130 PetriNetUnfolder]: 2774/5563 cut-off events. [2022-12-13 17:29:34,417 INFO L131 PetriNetUnfolder]: For 479691/479691 co-relation queries the response was YES. [2022-12-13 17:29:34,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73603 conditions, 5563 events. 2774/5563 cut-off events. For 479691/479691 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 44805 event pairs, 474 based on Foata normal form. 24/5587 useless extension candidates. Maximal degree in co-relation 73412. Up to 2470 conditions per place. [2022-12-13 17:29:34,492 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 718 selfloop transitions, 458 changer transitions 12/1188 dead transitions. [2022-12-13 17:29:34,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1188 transitions, 35284 flow [2022-12-13 17:29:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:29:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 17:29:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5461 transitions. [2022-12-13 17:29:34,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4330689928628073 [2022-12-13 17:29:34,496 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5461 transitions. [2022-12-13 17:29:34,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5461 transitions. [2022-12-13 17:29:34,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:34,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5461 transitions. [2022-12-13 17:29:34,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 210.03846153846155) internal successors, (5461), 26 states have internal predecessors, (5461), 0 states have call successors, (0), 0 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 17:29:34,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 485.0) internal successors, (13095), 27 states have internal predecessors, (13095), 0 states have call successors, (0), 0 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 17:29:34,505 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 485.0) internal successors, (13095), 27 states have internal predecessors, (13095), 0 states have call successors, (0), 0 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 17:29:34,505 INFO L175 Difference]: Start difference. First operand has 486 places, 1041 transitions, 30086 flow. Second operand 26 states and 5461 transitions. [2022-12-13 17:29:34,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1188 transitions, 35284 flow [2022-12-13 17:29:39,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1188 transitions, 32074 flow, removed 1235 selfloop flow, removed 12 redundant places. [2022-12-13 17:29:39,392 INFO L231 Difference]: Finished difference. Result has 503 places, 1053 transitions, 28615 flow [2022-12-13 17:29:39,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=26927, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=28615, PETRI_PLACES=503, PETRI_TRANSITIONS=1053} [2022-12-13 17:29:39,392 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 474 predicate places. [2022-12-13 17:29:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1053 transitions, 28615 flow [2022-12-13 17:29:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 207.0) internal successors, (3312), 16 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 17:29:39,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:39,393 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:39,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-13 17:29:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-13 17:29:39,594 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1031203042, now seen corresponding path program 50 times [2022-12-13 17:29:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681170921] [2022-12-13 17:29:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:39,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:39,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681170921] [2022-12-13 17:29:39,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681170921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:39,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847754353] [2022-12-13 17:29:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:29:39,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:39,667 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:39,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 17:29:39,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:29:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:39,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:39,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847754353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:39,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:39,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:29:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928015253] [2022-12-13 17:29:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:29:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:29:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:29:39,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:39,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1053 transitions, 28615 flow. Second operand has 15 states, 15 states have (on average 207.06666666666666) internal successors, (3106), 15 states have internal predecessors, (3106), 0 states have call successors, (0), 0 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 17:29:39,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:39,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:39,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:43,177 INFO L130 PetriNetUnfolder]: 2816/5619 cut-off events. [2022-12-13 17:29:43,178 INFO L131 PetriNetUnfolder]: For 347671/347671 co-relation queries the response was YES. [2022-12-13 17:29:43,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67851 conditions, 5619 events. 2816/5619 cut-off events. For 347671/347671 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 45242 event pairs, 228 based on Foata normal form. 36/5655 useless extension candidates. Maximal degree in co-relation 67658. Up to 4429 conditions per place. [2022-12-13 17:29:43,265 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 863 selfloop transitions, 270 changer transitions 0/1133 dead transitions. [2022-12-13 17:29:43,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1133 transitions, 32193 flow [2022-12-13 17:29:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 17:29:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 17:29:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3381 transitions. [2022-12-13 17:29:43,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4356958762886598 [2022-12-13 17:29:43,269 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3381 transitions. [2022-12-13 17:29:43,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3381 transitions. [2022-12-13 17:29:43,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:43,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3381 transitions. [2022-12-13 17:29:43,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 211.3125) internal successors, (3381), 16 states have internal predecessors, (3381), 0 states have call successors, (0), 0 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 17:29:43,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 485.0) internal successors, (8245), 17 states have internal predecessors, (8245), 0 states have call successors, (0), 0 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 17:29:43,278 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 485.0) internal successors, (8245), 17 states have internal predecessors, (8245), 0 states have call successors, (0), 0 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 17:29:43,278 INFO L175 Difference]: Start difference. First operand has 503 places, 1053 transitions, 28615 flow. Second operand 16 states and 3381 transitions. [2022-12-13 17:29:43,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1133 transitions, 32193 flow [2022-12-13 17:29:47,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1133 transitions, 31120 flow, removed 248 selfloop flow, removed 12 redundant places. [2022-12-13 17:29:47,172 INFO L231 Difference]: Finished difference. Result has 509 places, 1075 transitions, 28777 flow [2022-12-13 17:29:47,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=27519, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=28777, PETRI_PLACES=509, PETRI_TRANSITIONS=1075} [2022-12-13 17:29:47,172 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 480 predicate places. [2022-12-13 17:29:47,172 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1075 transitions, 28777 flow [2022-12-13 17:29:47,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 207.06666666666666) internal successors, (3106), 15 states have internal predecessors, (3106), 0 states have call successors, (0), 0 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 17:29:47,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:47,173 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:47,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-13 17:29:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-13 17:29:47,374 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash -401389829, now seen corresponding path program 51 times [2022-12-13 17:29:47,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:47,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072491299] [2022-12-13 17:29:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:47,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072491299] [2022-12-13 17:29:47,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072491299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:47,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340398080] [2022-12-13 17:29:47,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:29:47,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:47,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:47,467 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:47,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 17:29:47,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:29:47,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:47,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:47,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:47,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:47,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340398080] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:47,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:47,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:29:47,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936485744] [2022-12-13 17:29:47,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:47,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:29:47,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:29:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:29:47,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:47,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1075 transitions, 28777 flow. Second operand has 15 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 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 17:29:47,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:47,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:47,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:51,231 INFO L130 PetriNetUnfolder]: 3102/6179 cut-off events. [2022-12-13 17:29:51,231 INFO L131 PetriNetUnfolder]: For 397164/397164 co-relation queries the response was YES. [2022-12-13 17:29:51,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74690 conditions, 6179 events. 3102/6179 cut-off events. For 397164/397164 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 50459 event pairs, 446 based on Foata normal form. 40/6219 useless extension candidates. Maximal degree in co-relation 74494. Up to 2356 conditions per place. [2022-12-13 17:29:51,313 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 760 selfloop transitions, 551 changer transitions 11/1322 dead transitions. [2022-12-13 17:29:51,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1322 transitions, 37057 flow [2022-12-13 17:29:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:29:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 17:29:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5679 transitions. [2022-12-13 17:29:51,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336769759450172 [2022-12-13 17:29:51,317 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5679 transitions. [2022-12-13 17:29:51,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5679 transitions. [2022-12-13 17:29:51,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:51,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5679 transitions. [2022-12-13 17:29:51,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 210.33333333333334) internal successors, (5679), 27 states have internal predecessors, (5679), 0 states have call successors, (0), 0 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 17:29:51,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 485.0) internal successors, (13580), 28 states have internal predecessors, (13580), 0 states have call successors, (0), 0 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 17:29:51,326 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 485.0) internal successors, (13580), 28 states have internal predecessors, (13580), 0 states have call successors, (0), 0 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 17:29:51,326 INFO L175 Difference]: Start difference. First operand has 509 places, 1075 transitions, 28777 flow. Second operand 27 states and 5679 transitions. [2022-12-13 17:29:51,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1322 transitions, 37057 flow [2022-12-13 17:29:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 1322 transitions, 36608 flow, removed 38 selfloop flow, removed 11 redundant places. [2022-12-13 17:29:55,803 INFO L231 Difference]: Finished difference. Result has 528 places, 1147 transitions, 32349 flow [2022-12-13 17:29:55,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=28117, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=32349, PETRI_PLACES=528, PETRI_TRANSITIONS=1147} [2022-12-13 17:29:55,804 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 499 predicate places. [2022-12-13 17:29:55,804 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1147 transitions, 32349 flow [2022-12-13 17:29:55,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 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 17:29:55,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:55,804 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:55,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 17:29:56,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-13 17:29:56,005 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:29:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1832717665, now seen corresponding path program 52 times [2022-12-13 17:29:56,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091182241] [2022-12-13 17:29:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:56,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:56,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091182241] [2022-12-13 17:29:56,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091182241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368720659] [2022-12-13 17:29:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:29:56,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:56,100 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:56,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 17:29:56,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:29:56,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:29:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:56,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:56,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368720659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:56,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:56,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:29:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427549502] [2022-12-13 17:29:56,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:56,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:29:56,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:29:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:29:56,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:29:56,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1147 transitions, 32349 flow. Second operand has 15 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 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 17:29:56,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:56,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:29:56,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:00,516 INFO L130 PetriNetUnfolder]: 3315/6638 cut-off events. [2022-12-13 17:30:00,516 INFO L131 PetriNetUnfolder]: For 493657/493657 co-relation queries the response was YES. [2022-12-13 17:30:00,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83300 conditions, 6638 events. 3315/6638 cut-off events. For 493657/493657 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 54802 event pairs, 439 based on Foata normal form. 76/6714 useless extension candidates. Maximal degree in co-relation 83100. Up to 2261 conditions per place. [2022-12-13 17:30:00,604 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 756 selfloop transitions, 634 changer transitions 8/1398 dead transitions. [2022-12-13 17:30:00,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1398 transitions, 41231 flow [2022-12-13 17:30:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:30:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 17:30:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6516 transitions. [2022-12-13 17:30:00,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4333887595610243 [2022-12-13 17:30:00,608 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6516 transitions. [2022-12-13 17:30:00,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6516 transitions. [2022-12-13 17:30:00,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:00,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6516 transitions. [2022-12-13 17:30:00,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 210.19354838709677) internal successors, (6516), 31 states have internal predecessors, (6516), 0 states have call successors, (0), 0 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 17:30:00,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 485.0) internal successors, (15520), 32 states have internal predecessors, (15520), 0 states have call successors, (0), 0 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 17:30:00,647 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 485.0) internal successors, (15520), 32 states have internal predecessors, (15520), 0 states have call successors, (0), 0 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 17:30:00,647 INFO L175 Difference]: Start difference. First operand has 528 places, 1147 transitions, 32349 flow. Second operand 31 states and 6516 transitions. [2022-12-13 17:30:00,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1398 transitions, 41231 flow [2022-12-13 17:30:06,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1398 transitions, 39839 flow, removed 448 selfloop flow, removed 16 redundant places. [2022-12-13 17:30:06,063 INFO L231 Difference]: Finished difference. Result has 545 places, 1221 transitions, 35776 flow [2022-12-13 17:30:06,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=30478, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=35776, PETRI_PLACES=545, PETRI_TRANSITIONS=1221} [2022-12-13 17:30:06,064 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 516 predicate places. [2022-12-13 17:30:06,064 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 1221 transitions, 35776 flow [2022-12-13 17:30:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 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 17:30:06,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:06,064 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:06,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:06,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-13 17:30:06,265 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:30:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:06,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1228427081, now seen corresponding path program 53 times [2022-12-13 17:30:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:06,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034862002] [2022-12-13 17:30:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:06,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:06,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:06,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034862002] [2022-12-13 17:30:06,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034862002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:06,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051103821] [2022-12-13 17:30:06,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:30:06,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:06,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:06,355 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:06,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 17:30:06,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:30:06,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:06,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:30:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051103821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:06,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:06,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:30:06,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035171521] [2022-12-13 17:30:06,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:06,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:30:06,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:30:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:30:06,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:30:06,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 1221 transitions, 35776 flow. Second operand has 15 states, 15 states have (on average 206.8) internal successors, (3102), 15 states have internal predecessors, (3102), 0 states have call successors, (0), 0 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 17:30:06,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:06,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:30:06,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:10,968 INFO L130 PetriNetUnfolder]: 3308/6623 cut-off events. [2022-12-13 17:30:10,968 INFO L131 PetriNetUnfolder]: For 485125/485125 co-relation queries the response was YES. [2022-12-13 17:30:11,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84661 conditions, 6623 events. 3308/6623 cut-off events. For 485125/485125 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 54687 event pairs, 689 based on Foata normal form. 36/6659 useless extension candidates. Maximal degree in co-relation 84458. Up to 3285 conditions per place. [2022-12-13 17:30:11,058 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 855 selfloop transitions, 500 changer transitions 1/1356 dead transitions. [2022-12-13 17:30:11,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1356 transitions, 41489 flow [2022-12-13 17:30:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:30:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 17:30:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4634 transitions. [2022-12-13 17:30:11,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43430178069353326 [2022-12-13 17:30:11,061 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4634 transitions. [2022-12-13 17:30:11,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4634 transitions. [2022-12-13 17:30:11,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:11,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4634 transitions. [2022-12-13 17:30:11,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 210.63636363636363) internal successors, (4634), 22 states have internal predecessors, (4634), 0 states have call successors, (0), 0 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 17:30:11,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 485.0) internal successors, (11155), 23 states have internal predecessors, (11155), 0 states have call successors, (0), 0 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 17:30:11,080 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 485.0) internal successors, (11155), 23 states have internal predecessors, (11155), 0 states have call successors, (0), 0 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 17:30:11,080 INFO L175 Difference]: Start difference. First operand has 545 places, 1221 transitions, 35776 flow. Second operand 22 states and 4634 transitions. [2022-12-13 17:30:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1356 transitions, 41489 flow [2022-12-13 17:30:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1356 transitions, 39452 flow, removed 655 selfloop flow, removed 24 redundant places. [2022-12-13 17:30:17,069 INFO L231 Difference]: Finished difference. Result has 544 places, 1236 transitions, 35551 flow [2022-12-13 17:30:17,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=33609, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=35551, PETRI_PLACES=544, PETRI_TRANSITIONS=1236} [2022-12-13 17:30:17,070 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 515 predicate places. [2022-12-13 17:30:17,070 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1236 transitions, 35551 flow [2022-12-13 17:30:17,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.8) internal successors, (3102), 15 states have internal predecessors, (3102), 0 states have call successors, (0), 0 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 17:30:17,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:17,071 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:17,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-13 17:30:17,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-13 17:30:17,272 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:30:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash 548813432, now seen corresponding path program 54 times [2022-12-13 17:30:17,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:17,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600998938] [2022-12-13 17:30:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:17,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:17,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:17,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600998938] [2022-12-13 17:30:17,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600998938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:17,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854931232] [2022-12-13 17:30:17,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:30:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:17,352 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:17,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-13 17:30:17,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 17:30:17,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:30:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:17,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:17,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854931232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:17,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:17,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 17:30:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976570636] [2022-12-13 17:30:17,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:17,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:30:17,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:30:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:30:17,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:30:17,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1236 transitions, 35551 flow. Second operand has 15 states, 15 states have (on average 206.86666666666667) internal successors, (3103), 15 states have internal predecessors, (3103), 0 states have call successors, (0), 0 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 17:30:17,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:17,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:30:17,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:21,866 INFO L130 PetriNetUnfolder]: 3296/6595 cut-off events. [2022-12-13 17:30:21,866 INFO L131 PetriNetUnfolder]: For 435646/435646 co-relation queries the response was YES. [2022-12-13 17:30:21,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82864 conditions, 6595 events. 3296/6595 cut-off events. For 435646/435646 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 54446 event pairs, 202 based on Foata normal form. 72/6667 useless extension candidates. Maximal degree in co-relation 82658. Up to 4117 conditions per place. [2022-12-13 17:30:21,973 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 876 selfloop transitions, 430 changer transitions 0/1306 dead transitions. [2022-12-13 17:30:21,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1306 transitions, 39058 flow [2022-12-13 17:30:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:30:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 17:30:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4645 transitions. [2022-12-13 17:30:21,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4353327085285848 [2022-12-13 17:30:21,979 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4645 transitions. [2022-12-13 17:30:21,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4645 transitions. [2022-12-13 17:30:21,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:21,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4645 transitions. [2022-12-13 17:30:21,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 211.13636363636363) internal successors, (4645), 22 states have internal predecessors, (4645), 0 states have call successors, (0), 0 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 17:30:21,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 485.0) internal successors, (11155), 23 states have internal predecessors, (11155), 0 states have call successors, (0), 0 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 17:30:21,990 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 485.0) internal successors, (11155), 23 states have internal predecessors, (11155), 0 states have call successors, (0), 0 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 17:30:21,990 INFO L175 Difference]: Start difference. First operand has 544 places, 1236 transitions, 35551 flow. Second operand 22 states and 4645 transitions. [2022-12-13 17:30:21,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1306 transitions, 39058 flow [2022-12-13 17:30:27,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1306 transitions, 38268 flow, removed 191 selfloop flow, removed 14 redundant places. [2022-12-13 17:30:27,656 INFO L231 Difference]: Finished difference. Result has 551 places, 1231 transitions, 35683 flow [2022-12-13 17:30:27,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=34337, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=35683, PETRI_PLACES=551, PETRI_TRANSITIONS=1231} [2022-12-13 17:30:27,657 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 522 predicate places. [2022-12-13 17:30:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1231 transitions, 35683 flow [2022-12-13 17:30:27,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.86666666666667) internal successors, (3103), 15 states have internal predecessors, (3103), 0 states have call successors, (0), 0 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 17:30:27,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:27,658 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:27,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-13 17:30:27,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-13 17:30:27,858 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:30:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -545312268, now seen corresponding path program 55 times [2022-12-13 17:30:27,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869543009] [2022-12-13 17:30:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:27,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869543009] [2022-12-13 17:30:27,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869543009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572554022] [2022-12-13 17:30:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:30:27,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:27,923 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:27,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-13 17:30:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:30:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:28,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:28,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572554022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:28,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:28,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:30:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530852913] [2022-12-13 17:30:28,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:30:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:30:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:30:28,141 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:30:28,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1231 transitions, 35683 flow. Second operand has 16 states, 16 states have (on average 206.75) internal successors, (3308), 16 states have internal predecessors, (3308), 0 states have call successors, (0), 0 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 17:30:28,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:28,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:30:28,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:32,948 INFO L130 PetriNetUnfolder]: 3758/7505 cut-off events. [2022-12-13 17:30:32,948 INFO L131 PetriNetUnfolder]: For 527736/527736 co-relation queries the response was YES. [2022-12-13 17:30:33,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96417 conditions, 7505 events. 3758/7505 cut-off events. For 527736/527736 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 63321 event pairs, 158 based on Foata normal form. 76/7581 useless extension candidates. Maximal degree in co-relation 96214. Up to 2248 conditions per place. [2022-12-13 17:30:33,048 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 764 selfloop transitions, 731 changer transitions 13/1508 dead transitions. [2022-12-13 17:30:33,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1508 transitions, 46510 flow [2022-12-13 17:30:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 17:30:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 17:30:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6934 transitions. [2022-12-13 17:30:33,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332396126210559 [2022-12-13 17:30:33,053 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6934 transitions. [2022-12-13 17:30:33,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6934 transitions. [2022-12-13 17:30:33,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:33,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6934 transitions. [2022-12-13 17:30:33,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 210.12121212121212) internal successors, (6934), 33 states have internal predecessors, (6934), 0 states have call successors, (0), 0 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 17:30:33,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 485.0) internal successors, (16490), 34 states have internal predecessors, (16490), 0 states have call successors, (0), 0 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 17:30:33,064 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 485.0) internal successors, (16490), 34 states have internal predecessors, (16490), 0 states have call successors, (0), 0 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 17:30:33,064 INFO L175 Difference]: Start difference. First operand has 551 places, 1231 transitions, 35683 flow. Second operand 33 states and 6934 transitions. [2022-12-13 17:30:33,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1508 transitions, 46510 flow [2022-12-13 17:30:39,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1508 transitions, 45596 flow, removed 90 selfloop flow, removed 20 redundant places. [2022-12-13 17:30:39,290 INFO L231 Difference]: Finished difference. Result has 573 places, 1380 transitions, 42905 flow [2022-12-13 17:30:39,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=34026, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=42905, PETRI_PLACES=573, PETRI_TRANSITIONS=1380} [2022-12-13 17:30:39,291 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 544 predicate places. [2022-12-13 17:30:39,291 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1380 transitions, 42905 flow [2022-12-13 17:30:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 206.75) internal successors, (3308), 16 states have internal predecessors, (3308), 0 states have call successors, (0), 0 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 17:30:39,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:39,291 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:39,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-13 17:30:39,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:39,492 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:30:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1844855486, now seen corresponding path program 56 times [2022-12-13 17:30:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:39,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763350157] [2022-12-13 17:30:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763350157] [2022-12-13 17:30:39,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763350157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114551540] [2022-12-13 17:30:39,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:30:39,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:39,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:39,568 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:39,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-13 17:30:39,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:30:39,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:30:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:39,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:39,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114551540] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:39,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:39,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 17:30:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898402775] [2022-12-13 17:30:39,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:30:39,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:30:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:30:39,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:30:39,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1380 transitions, 42905 flow. Second operand has 18 states, 18 states have (on average 207.0) internal successors, (3726), 18 states have internal predecessors, (3726), 0 states have call successors, (0), 0 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 17:30:39,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:39,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:30:39,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:30:45,645 INFO L130 PetriNetUnfolder]: 4128/8171 cut-off events. [2022-12-13 17:30:45,645 INFO L131 PetriNetUnfolder]: For 611898/611898 co-relation queries the response was YES. [2022-12-13 17:30:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108958 conditions, 8171 events. 4128/8171 cut-off events. For 611898/611898 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 69541 event pairs, 364 based on Foata normal form. 28/8199 useless extension candidates. Maximal degree in co-relation 108748. Up to 6914 conditions per place. [2022-12-13 17:30:45,760 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1330 selfloop transitions, 276 changer transitions 0/1606 dead transitions. [2022-12-13 17:30:45,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1606 transitions, 52035 flow [2022-12-13 17:30:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:30:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:30:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4228 transitions. [2022-12-13 17:30:45,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43587628865979383 [2022-12-13 17:30:45,763 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4228 transitions. [2022-12-13 17:30:45,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4228 transitions. [2022-12-13 17:30:45,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:30:45,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4228 transitions. [2022-12-13 17:30:45,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 211.4) internal successors, (4228), 20 states have internal predecessors, (4228), 0 states have call successors, (0), 0 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 17:30:45,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:30:45,770 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:30:45,770 INFO L175 Difference]: Start difference. First operand has 573 places, 1380 transitions, 42905 flow. Second operand 20 states and 4228 transitions. [2022-12-13 17:30:45,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1606 transitions, 52035 flow [2022-12-13 17:30:55,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1606 transitions, 49598 flow, removed 1105 selfloop flow, removed 12 redundant places. [2022-12-13 17:30:56,032 INFO L231 Difference]: Finished difference. Result has 589 places, 1511 transitions, 45681 flow [2022-12-13 17:30:56,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=40590, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=45681, PETRI_PLACES=589, PETRI_TRANSITIONS=1511} [2022-12-13 17:30:56,033 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 560 predicate places. [2022-12-13 17:30:56,033 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1511 transitions, 45681 flow [2022-12-13 17:30:56,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 207.0) internal successors, (3726), 18 states have internal predecessors, (3726), 0 states have call successors, (0), 0 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 17:30:56,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:30:56,033 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:56,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-13 17:30:56,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:56,234 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:30:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash -218414852, now seen corresponding path program 57 times [2022-12-13 17:30:56,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:56,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188280233] [2022-12-13 17:30:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:56,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:56,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188280233] [2022-12-13 17:30:56,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188280233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:56,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882207943] [2022-12-13 17:30:56,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:30:56,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:56,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:56,338 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:56,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-13 17:30:56,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:30:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:56,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:30:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:56,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:30:56,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882207943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:56,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:56,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-12-13 17:30:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321684296] [2022-12-13 17:30:56,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:30:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:30:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:30:56,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:30:56,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1511 transitions, 45681 flow. Second operand has 15 states, 15 states have (on average 207.06666666666666) internal successors, (3106), 15 states have internal predecessors, (3106), 0 states have call successors, (0), 0 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 17:30:56,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:30:56,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:30:56,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:02,733 INFO L130 PetriNetUnfolder]: 4206/8303 cut-off events. [2022-12-13 17:31:02,734 INFO L131 PetriNetUnfolder]: For 571709/571709 co-relation queries the response was YES. [2022-12-13 17:31:02,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107932 conditions, 8303 events. 4206/8303 cut-off events. For 571709/571709 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 70529 event pairs, 302 based on Foata normal form. 84/8387 useless extension candidates. Maximal degree in co-relation 107714. Up to 5741 conditions per place. [2022-12-13 17:31:02,863 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1139 selfloop transitions, 504 changer transitions 1/1644 dead transitions. [2022-12-13 17:31:02,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 1644 transitions, 51973 flow [2022-12-13 17:31:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 17:31:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 17:31:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4433 transitions. [2022-12-13 17:31:02,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43524791359842907 [2022-12-13 17:31:02,866 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4433 transitions. [2022-12-13 17:31:02,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4433 transitions. [2022-12-13 17:31:02,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:02,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4433 transitions. [2022-12-13 17:31:02,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 211.0952380952381) internal successors, (4433), 21 states have internal predecessors, (4433), 0 states have call successors, (0), 0 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 17:31:02,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 485.0) internal successors, (10670), 22 states have internal predecessors, (10670), 0 states have call successors, (0), 0 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 17:31:02,873 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 485.0) internal successors, (10670), 22 states have internal predecessors, (10670), 0 states have call successors, (0), 0 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 17:31:02,873 INFO L175 Difference]: Start difference. First operand has 589 places, 1511 transitions, 45681 flow. Second operand 21 states and 4433 transitions. [2022-12-13 17:31:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 1644 transitions, 51973 flow [2022-12-13 17:31:11,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 1644 transitions, 51403 flow, removed 242 selfloop flow, removed 6 redundant places. [2022-12-13 17:31:12,015 INFO L231 Difference]: Finished difference. Result has 605 places, 1550 transitions, 47808 flow [2022-12-13 17:31:12,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=44889, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=47808, PETRI_PLACES=605, PETRI_TRANSITIONS=1550} [2022-12-13 17:31:12,016 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 576 predicate places. [2022-12-13 17:31:12,016 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1550 transitions, 47808 flow [2022-12-13 17:31:12,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 207.06666666666666) internal successors, (3106), 15 states have internal predecessors, (3106), 0 states have call successors, (0), 0 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 17:31:12,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:12,016 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:12,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-13 17:31:12,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:12,218 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:31:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1692957748, now seen corresponding path program 58 times [2022-12-13 17:31:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:12,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64774750] [2022-12-13 17:31:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:12,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:12,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64774750] [2022-12-13 17:31:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64774750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556529233] [2022-12-13 17:31:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:31:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:12,308 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:12,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-13 17:31:12,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:31:12,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:31:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:31:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:12,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:31:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:12,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556529233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:31:12,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:31:12,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-13 17:31:12,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755003581] [2022-12-13 17:31:12,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:31:12,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:31:12,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:31:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:31:12,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:31:12,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1550 transitions, 47808 flow. Second operand has 15 states, 15 states have (on average 206.86666666666667) internal successors, (3103), 15 states have internal predecessors, (3103), 0 states have call successors, (0), 0 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 17:31:12,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:12,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:31:12,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:18,951 INFO L130 PetriNetUnfolder]: 4281/8464 cut-off events. [2022-12-13 17:31:18,952 INFO L131 PetriNetUnfolder]: For 638471/638471 co-relation queries the response was YES. [2022-12-13 17:31:19,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113386 conditions, 8464 events. 4281/8464 cut-off events. For 638471/638471 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 72399 event pairs, 216 based on Foata normal form. 134/8598 useless extension candidates. Maximal degree in co-relation 113164. Up to 3386 conditions per place. [2022-12-13 17:31:19,075 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 915 selfloop transitions, 767 changer transitions 0/1682 dead transitions. [2022-12-13 17:31:19,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1682 transitions, 55025 flow [2022-12-13 17:31:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:31:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 17:31:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4856 transitions. [2022-12-13 17:31:19,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43532048408785295 [2022-12-13 17:31:19,079 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4856 transitions. [2022-12-13 17:31:19,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4856 transitions. [2022-12-13 17:31:19,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:19,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4856 transitions. [2022-12-13 17:31:19,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 211.1304347826087) internal successors, (4856), 23 states have internal predecessors, (4856), 0 states have call successors, (0), 0 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 17:31:19,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 485.0) internal successors, (11640), 24 states have internal predecessors, (11640), 0 states have call successors, (0), 0 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 17:31:19,086 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 485.0) internal successors, (11640), 24 states have internal predecessors, (11640), 0 states have call successors, (0), 0 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 17:31:19,086 INFO L175 Difference]: Start difference. First operand has 605 places, 1550 transitions, 47808 flow. Second operand 23 states and 4856 transitions. [2022-12-13 17:31:19,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1682 transitions, 55025 flow [2022-12-13 17:31:29,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1682 transitions, 54234 flow, removed 220 selfloop flow, removed 11 redundant places. [2022-12-13 17:31:29,037 INFO L231 Difference]: Finished difference. Result has 617 places, 1561 transitions, 50520 flow [2022-12-13 17:31:29,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=46224, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=732, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=50520, PETRI_PLACES=617, PETRI_TRANSITIONS=1561} [2022-12-13 17:31:29,038 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 588 predicate places. [2022-12-13 17:31:29,038 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1561 transitions, 50520 flow [2022-12-13 17:31:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 206.86666666666667) internal successors, (3103), 15 states have internal predecessors, (3103), 0 states have call successors, (0), 0 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 17:31:29,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:29,038 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:29,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-13 17:31:29,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:29,239 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:31:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash -295451370, now seen corresponding path program 59 times [2022-12-13 17:31:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:29,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254854662] [2022-12-13 17:31:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254854662] [2022-12-13 17:31:29,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254854662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877359741] [2022-12-13 17:31:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:31:29,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:29,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:29,317 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:29,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-13 17:31:29,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:31:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:31:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:31:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:29,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:31:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:31:29,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877359741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:31:29,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:31:29,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-13 17:31:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502970671] [2022-12-13 17:31:29,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:31:29,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:31:29,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:31:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:31:29,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:31:29,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1561 transitions, 50520 flow. Second operand has 18 states, 18 states have (on average 206.66666666666666) internal successors, (3720), 18 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 17:31:29,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:29,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:31:29,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:36,883 INFO L130 PetriNetUnfolder]: 4573/9114 cut-off events. [2022-12-13 17:31:36,883 INFO L131 PetriNetUnfolder]: For 749085/749085 co-relation queries the response was YES. [2022-12-13 17:31:36,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127342 conditions, 9114 events. 4573/9114 cut-off events. For 749085/749085 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 79421 event pairs, 224 based on Foata normal form. 38/9152 useless extension candidates. Maximal degree in co-relation 127120. Up to 2766 conditions per place. [2022-12-13 17:31:37,021 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 818 selfloop transitions, 975 changer transitions 10/1803 dead transitions. [2022-12-13 17:31:37,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1803 transitions, 61644 flow [2022-12-13 17:31:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 17:31:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 17:31:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 7135 transitions. [2022-12-13 17:31:37,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326864766525167 [2022-12-13 17:31:37,026 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 7135 transitions. [2022-12-13 17:31:37,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 7135 transitions. [2022-12-13 17:31:37,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:37,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 7135 transitions. [2022-12-13 17:31:37,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 209.85294117647058) internal successors, (7135), 34 states have internal predecessors, (7135), 0 states have call successors, (0), 0 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 17:31:37,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 485.0) internal successors, (16975), 35 states have internal predecessors, (16975), 0 states have call successors, (0), 0 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 17:31:37,038 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 485.0) internal successors, (16975), 35 states have internal predecessors, (16975), 0 states have call successors, (0), 0 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 17:31:37,038 INFO L175 Difference]: Start difference. First operand has 617 places, 1561 transitions, 50520 flow. Second operand 34 states and 7135 transitions. [2022-12-13 17:31:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1803 transitions, 61644 flow [2022-12-13 17:31:48,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1803 transitions, 61157 flow, removed 185 selfloop flow, removed 12 redundant places. [2022-12-13 17:31:48,385 INFO L231 Difference]: Finished difference. Result has 645 places, 1667 transitions, 58028 flow [2022-12-13 17:31:48,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=49902, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=879, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=58028, PETRI_PLACES=645, PETRI_TRANSITIONS=1667} [2022-12-13 17:31:48,386 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 616 predicate places. [2022-12-13 17:31:48,386 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1667 transitions, 58028 flow [2022-12-13 17:31:48,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.66666666666666) internal successors, (3720), 18 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 17:31:48,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:48,386 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:48,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-13 17:31:48,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-12-13 17:31:48,587 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:31:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1766004256, now seen corresponding path program 60 times [2022-12-13 17:31:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:48,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063094924] [2022-12-13 17:31:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063094924] [2022-12-13 17:31:48,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063094924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228318720] [2022-12-13 17:31:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:31:48,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:48,668 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:48,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-13 17:31:48,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 17:31:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:31:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:31:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:48,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:31:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:31:48,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228318720] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:31:48,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:31:48,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-13 17:31:48,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682699413] [2022-12-13 17:31:48,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:31:48,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:31:48,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:48,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:31:48,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:31:48,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:31:48,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1667 transitions, 58028 flow. Second operand has 17 states, 17 states have (on average 206.94117647058823) internal successors, (3518), 17 states have internal predecessors, (3518), 0 states have call successors, (0), 0 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 17:31:48,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:48,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:31:48,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:57,871 INFO L130 PetriNetUnfolder]: 5314/10669 cut-off events. [2022-12-13 17:31:57,871 INFO L131 PetriNetUnfolder]: For 967971/967971 co-relation queries the response was YES. [2022-12-13 17:31:57,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157047 conditions, 10669 events. 5314/10669 cut-off events. For 967971/967971 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 96104 event pairs, 270 based on Foata normal form. 36/10705 useless extension candidates. Maximal degree in co-relation 156818. Up to 3242 conditions per place. [2022-12-13 17:31:58,044 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 989 selfloop transitions, 1068 changer transitions 0/2057 dead transitions. [2022-12-13 17:31:58,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 2057 transitions, 76154 flow [2022-12-13 17:31:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 17:31:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 17:31:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5075 transitions. [2022-12-13 17:31:58,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43599656357388317 [2022-12-13 17:31:58,048 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5075 transitions. [2022-12-13 17:31:58,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5075 transitions. [2022-12-13 17:31:58,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:58,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5075 transitions. [2022-12-13 17:31:58,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 211.45833333333334) internal successors, (5075), 24 states have internal predecessors, (5075), 0 states have call successors, (0), 0 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 17:31:58,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 485.0) internal successors, (12125), 25 states have internal predecessors, (12125), 0 states have call successors, (0), 0 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 17:31:58,056 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 485.0) internal successors, (12125), 25 states have internal predecessors, (12125), 0 states have call successors, (0), 0 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 17:31:58,056 INFO L175 Difference]: Start difference. First operand has 645 places, 1667 transitions, 58028 flow. Second operand 24 states and 5075 transitions. [2022-12-13 17:31:58,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 2057 transitions, 76154 flow [2022-12-13 17:32:15,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 2057 transitions, 73148 flow, removed 1460 selfloop flow, removed 8 redundant places. [2022-12-13 17:32:15,439 INFO L231 Difference]: Finished difference. Result has 664 places, 1880 transitions, 68363 flow [2022-12-13 17:32:15,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=55437, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=863, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=68363, PETRI_PLACES=664, PETRI_TRANSITIONS=1880} [2022-12-13 17:32:15,440 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 635 predicate places. [2022-12-13 17:32:15,440 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1880 transitions, 68363 flow [2022-12-13 17:32:15,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 206.94117647058823) internal successors, (3518), 17 states have internal predecessors, (3518), 0 states have call successors, (0), 0 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 17:32:15,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:32:15,440 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:32:15,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-13 17:32:15,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:32:15,641 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:32:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:32:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2145503044, now seen corresponding path program 61 times [2022-12-13 17:32:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:32:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462361290] [2022-12-13 17:32:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:32:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:32:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:32:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:32:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:32:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462361290] [2022-12-13 17:32:15,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462361290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:32:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822381426] [2022-12-13 17:32:15,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:32:15,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:32:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:32:15,738 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:32:15,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-13 17:32:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:32:15,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:32:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:32:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:32:15,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:32:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:32:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822381426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:32:15,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:32:15,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 17:32:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160027523] [2022-12-13 17:32:15,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:32:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:32:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:32:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:32:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:32:15,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:32:15,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1880 transitions, 68363 flow. Second operand has 20 states, 20 states have (on average 206.55) internal successors, (4131), 20 states have internal predecessors, (4131), 0 states have call successors, (0), 0 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 17:32:15,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:32:15,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:32:15,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:32:26,395 INFO L130 PetriNetUnfolder]: 5534/11125 cut-off events. [2022-12-13 17:32:26,395 INFO L131 PetriNetUnfolder]: For 986314/986314 co-relation queries the response was YES. [2022-12-13 17:32:26,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163080 conditions, 11125 events. 5534/11125 cut-off events. For 986314/986314 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 100745 event pairs, 260 based on Foata normal form. 12/11137 useless extension candidates. Maximal degree in co-relation 162846. Up to 3204 conditions per place. [2022-12-13 17:32:26,585 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 933 selfloop transitions, 1112 changer transitions 10/2055 dead transitions. [2022-12-13 17:32:26,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 2055 transitions, 77106 flow [2022-12-13 17:32:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:32:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 17:32:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6497 transitions. [2022-12-13 17:32:26,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43212504156967074 [2022-12-13 17:32:26,589 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6497 transitions. [2022-12-13 17:32:26,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6497 transitions. [2022-12-13 17:32:26,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:32:26,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6497 transitions. [2022-12-13 17:32:26,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 209.58064516129033) internal successors, (6497), 31 states have internal predecessors, (6497), 0 states have call successors, (0), 0 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 17:32:26,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 485.0) internal successors, (15520), 32 states have internal predecessors, (15520), 0 states have call successors, (0), 0 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 17:32:26,601 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 485.0) internal successors, (15520), 32 states have internal predecessors, (15520), 0 states have call successors, (0), 0 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 17:32:26,601 INFO L175 Difference]: Start difference. First operand has 664 places, 1880 transitions, 68363 flow. Second operand 31 states and 6497 transitions. [2022-12-13 17:32:26,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 2055 transitions, 77106 flow [2022-12-13 17:32:45,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 2055 transitions, 75491 flow, removed 647 selfloop flow, removed 14 redundant places. [2022-12-13 17:32:45,791 INFO L231 Difference]: Finished difference. Result has 688 places, 1958 transitions, 73537 flow [2022-12-13 17:32:45,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=66827, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=73537, PETRI_PLACES=688, PETRI_TRANSITIONS=1958} [2022-12-13 17:32:45,792 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 659 predicate places. [2022-12-13 17:32:45,793 INFO L495 AbstractCegarLoop]: Abstraction has has 688 places, 1958 transitions, 73537 flow [2022-12-13 17:32:45,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 206.55) internal successors, (4131), 20 states have internal predecessors, (4131), 0 states have call successors, (0), 0 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 17:32:45,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:32:45,793 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:32:45,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-12-13 17:32:45,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:32:45,994 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:32:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:32:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash -591313182, now seen corresponding path program 62 times [2022-12-13 17:32:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:32:45,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297167791] [2022-12-13 17:32:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:32:45,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:32:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:32:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:32:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:32:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297167791] [2022-12-13 17:32:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297167791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:32:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857338257] [2022-12-13 17:32:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:32:46,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:32:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:32:46,094 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:32:46,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-13 17:32:46,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:32:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:32:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:32:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:32:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:32:46,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:32:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:32:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857338257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:32:46,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:32:46,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 17:32:46,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492812714] [2022-12-13 17:32:46,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:32:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:32:46,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:32:46,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:32:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:32:46,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:32:46,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 1958 transitions, 73537 flow. Second operand has 20 states, 20 states have (on average 206.7) internal successors, (4134), 20 states have internal predecessors, (4134), 0 states have call successors, (0), 0 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 17:32:46,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:32:46,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:32:46,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:32:57,526 INFO L130 PetriNetUnfolder]: 5755/11550 cut-off events. [2022-12-13 17:32:57,527 INFO L131 PetriNetUnfolder]: For 1035359/1035359 co-relation queries the response was YES. [2022-12-13 17:32:57,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171981 conditions, 11550 events. 5755/11550 cut-off events. For 1035359/1035359 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 105077 event pairs, 2195 based on Foata normal form. 106/11656 useless extension candidates. Maximal degree in co-relation 171740. Up to 10659 conditions per place. [2022-12-13 17:32:57,723 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1943 selfloop transitions, 186 changer transitions 0/2129 dead transitions. [2022-12-13 17:32:57,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 2129 transitions, 83450 flow [2022-12-13 17:32:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 17:32:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 17:32:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4445 transitions. [2022-12-13 17:32:57,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436426116838488 [2022-12-13 17:32:57,726 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4445 transitions. [2022-12-13 17:32:57,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4445 transitions. [2022-12-13 17:32:57,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:32:57,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4445 transitions. [2022-12-13 17:32:57,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 211.66666666666666) internal successors, (4445), 21 states have internal predecessors, (4445), 0 states have call successors, (0), 0 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 17:32:57,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 485.0) internal successors, (10670), 22 states have internal predecessors, (10670), 0 states have call successors, (0), 0 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 17:32:57,733 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 485.0) internal successors, (10670), 22 states have internal predecessors, (10670), 0 states have call successors, (0), 0 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 17:32:57,733 INFO L175 Difference]: Start difference. First operand has 688 places, 1958 transitions, 73537 flow. Second operand 21 states and 4445 transitions. [2022-12-13 17:32:57,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 2129 transitions, 83450 flow [2022-12-13 17:33:19,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 2129 transitions, 82708 flow, removed 221 selfloop flow, removed 13 redundant places. [2022-12-13 17:33:19,098 INFO L231 Difference]: Finished difference. Result has 701 places, 2042 transitions, 77545 flow [2022-12-13 17:33:19,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=72766, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=77545, PETRI_PLACES=701, PETRI_TRANSITIONS=2042} [2022-12-13 17:33:19,099 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 672 predicate places. [2022-12-13 17:33:19,099 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 2042 transitions, 77545 flow [2022-12-13 17:33:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 206.7) internal successors, (4134), 20 states have internal predecessors, (4134), 0 states have call successors, (0), 0 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 17:33:19,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:19,100 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:33:19,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-12-13 17:33:19,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:19,301 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:33:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:19,302 INFO L85 PathProgramCache]: Analyzing trace with hash 31248904, now seen corresponding path program 63 times [2022-12-13 17:33:19,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:19,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571068214] [2022-12-13 17:33:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:19,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571068214] [2022-12-13 17:33:19,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571068214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727248077] [2022-12-13 17:33:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:33:19,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:19,398 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:19,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-13 17:33:19,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:33:19,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:33:19,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:33:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:19,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:19,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727248077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:19,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:33:19,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 17:33:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078099184] [2022-12-13 17:33:19,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:19,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:33:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:33:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:33:19,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:33:19,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 2042 transitions, 77545 flow. Second operand has 20 states, 20 states have (on average 206.55) internal successors, (4131), 20 states have internal predecessors, (4131), 0 states have call successors, (0), 0 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 17:33:19,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:19,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:33:19,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:33:32,419 INFO L130 PetriNetUnfolder]: 6152/12399 cut-off events. [2022-12-13 17:33:32,419 INFO L131 PetriNetUnfolder]: For 1179355/1179355 co-relation queries the response was YES. [2022-12-13 17:33:32,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187428 conditions, 12399 events. 6152/12399 cut-off events. For 1179355/1179355 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 114743 event pairs, 920 based on Foata normal form. 34/12433 useless extension candidates. Maximal degree in co-relation 187178. Up to 3686 conditions per place. [2022-12-13 17:33:32,632 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1426 selfloop transitions, 882 changer transitions 20/2328 dead transitions. [2022-12-13 17:33:32,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 2328 transitions, 90997 flow [2022-12-13 17:33:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 17:33:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 17:33:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7763 transitions. [2022-12-13 17:33:32,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43259960991919755 [2022-12-13 17:33:32,636 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7763 transitions. [2022-12-13 17:33:32,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7763 transitions. [2022-12-13 17:33:32,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:33:32,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7763 transitions. [2022-12-13 17:33:32,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 209.8108108108108) internal successors, (7763), 37 states have internal predecessors, (7763), 0 states have call successors, (0), 0 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 17:33:32,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 485.0) internal successors, (18430), 38 states have internal predecessors, (18430), 0 states have call successors, (0), 0 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 17:33:32,649 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 485.0) internal successors, (18430), 38 states have internal predecessors, (18430), 0 states have call successors, (0), 0 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 17:33:32,649 INFO L175 Difference]: Start difference. First operand has 701 places, 2042 transitions, 77545 flow. Second operand 37 states and 7763 transitions. [2022-12-13 17:33:32,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 2328 transitions, 90997 flow [2022-12-13 17:33:58,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 2328 transitions, 88824 flow, removed 1064 selfloop flow, removed 4 redundant places. [2022-12-13 17:33:59,028 INFO L231 Difference]: Finished difference. Result has 746 places, 2187 transitions, 85227 flow [2022-12-13 17:33:59,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=75593, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=85227, PETRI_PLACES=746, PETRI_TRANSITIONS=2187} [2022-12-13 17:33:59,030 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 717 predicate places. [2022-12-13 17:33:59,030 INFO L495 AbstractCegarLoop]: Abstraction has has 746 places, 2187 transitions, 85227 flow [2022-12-13 17:33:59,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 206.55) internal successors, (4131), 20 states have internal predecessors, (4131), 0 states have call successors, (0), 0 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 17:33:59,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:33:59,030 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:33:59,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-13 17:33:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:59,231 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:33:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash -246637289, now seen corresponding path program 64 times [2022-12-13 17:33:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443393613] [2022-12-13 17:33:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443393613] [2022-12-13 17:33:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443393613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496904686] [2022-12-13 17:33:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:33:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:59,339 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:59,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-13 17:33:59,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:33:59,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:33:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:33:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:59,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:33:59,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496904686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:59,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:33:59,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 17:33:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589211484] [2022-12-13 17:33:59,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:59,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:33:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:33:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:33:59,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:33:59,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 2187 transitions, 85227 flow. Second operand has 20 states, 20 states have (on average 206.65) internal successors, (4133), 20 states have internal predecessors, (4133), 0 states have call successors, (0), 0 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 17:33:59,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:33:59,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:33:59,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:34:13,812 INFO L130 PetriNetUnfolder]: 6534/13107 cut-off events. [2022-12-13 17:34:13,812 INFO L131 PetriNetUnfolder]: For 1432382/1432382 co-relation queries the response was YES. [2022-12-13 17:34:13,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204482 conditions, 13107 events. 6534/13107 cut-off events. For 1432382/1432382 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 121801 event pairs, 605 based on Foata normal form. 116/13223 useless extension candidates. Maximal degree in co-relation 204218. Up to 11499 conditions per place. [2022-12-13 17:34:14,059 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 2102 selfloop transitions, 357 changer transitions 0/2459 dead transitions. [2022-12-13 17:34:14,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 2459 transitions, 99851 flow [2022-12-13 17:34:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:34:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 17:34:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5467 transitions. [2022-12-13 17:34:14,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4335448057097542 [2022-12-13 17:34:14,063 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5467 transitions. [2022-12-13 17:34:14,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5467 transitions. [2022-12-13 17:34:14,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:34:14,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5467 transitions. [2022-12-13 17:34:14,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 210.26923076923077) internal successors, (5467), 26 states have internal predecessors, (5467), 0 states have call successors, (0), 0 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 17:34:14,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 485.0) internal successors, (13095), 27 states have internal predecessors, (13095), 0 states have call successors, (0), 0 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 17:34:14,073 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 485.0) internal successors, (13095), 27 states have internal predecessors, (13095), 0 states have call successors, (0), 0 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 17:34:14,073 INFO L175 Difference]: Start difference. First operand has 746 places, 2187 transitions, 85227 flow. Second operand 26 states and 5467 transitions. [2022-12-13 17:34:14,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 2459 transitions, 99851 flow [2022-12-13 17:34:47,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 2459 transitions, 95925 flow, removed 1649 selfloop flow, removed 15 redundant places. [2022-12-13 17:34:47,266 INFO L231 Difference]: Finished difference. Result has 765 places, 2351 transitions, 89585 flow [2022-12-13 17:34:47,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=81959, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1939, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=89585, PETRI_PLACES=765, PETRI_TRANSITIONS=2351} [2022-12-13 17:34:47,267 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 736 predicate places. [2022-12-13 17:34:47,267 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 2351 transitions, 89585 flow [2022-12-13 17:34:47,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 206.65) internal successors, (4133), 20 states have internal predecessors, (4133), 0 states have call successors, (0), 0 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 17:34:47,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:34:47,267 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:34:47,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-13 17:34:47,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-13 17:34:47,469 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:34:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:34:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2073820408, now seen corresponding path program 65 times [2022-12-13 17:34:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:34:47,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007380254] [2022-12-13 17:34:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:34:47,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:34:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:34:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:47,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:34:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007380254] [2022-12-13 17:34:47,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007380254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:34:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894033027] [2022-12-13 17:34:47,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:34:47,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:34:47,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:34:47,542 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:34:47,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-13 17:34:47,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:34:47,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:34:47,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:34:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:34:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:34:47,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:34:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:34:47,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894033027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:34:47,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:34:47,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-12-13 17:34:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900501715] [2022-12-13 17:34:47,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:34:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:34:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:34:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:34:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:34:47,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:34:47,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 2351 transitions, 89585 flow. Second operand has 16 states, 16 states have (on average 206.8125) internal successors, (3309), 16 states have internal predecessors, (3309), 0 states have call successors, (0), 0 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 17:34:47,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:34:47,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:34:47,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:03,259 INFO L130 PetriNetUnfolder]: 6622/13243 cut-off events. [2022-12-13 17:35:03,259 INFO L131 PetriNetUnfolder]: For 1347138/1347138 co-relation queries the response was YES. [2022-12-13 17:35:03,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204167 conditions, 13243 events. 6622/13243 cut-off events. For 1347138/1347138 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 122958 event pairs, 1114 based on Foata normal form. 32/13275 useless extension candidates. Maximal degree in co-relation 203898. Up to 4444 conditions per place. [2022-12-13 17:35:03,507 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1642 selfloop transitions, 827 changer transitions 6/2475 dead transitions. [2022-12-13 17:35:03,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 2475 transitions, 98356 flow [2022-12-13 17:35:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:35:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 17:35:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5465 transitions. [2022-12-13 17:35:03,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43338620142743856 [2022-12-13 17:35:03,511 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5465 transitions. [2022-12-13 17:35:03,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5465 transitions. [2022-12-13 17:35:03,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:03,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5465 transitions. [2022-12-13 17:35:03,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 210.19230769230768) internal successors, (5465), 26 states have internal predecessors, (5465), 0 states have call successors, (0), 0 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 17:35:03,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 485.0) internal successors, (13095), 27 states have internal predecessors, (13095), 0 states have call successors, (0), 0 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 17:35:03,520 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 485.0) internal successors, (13095), 27 states have internal predecessors, (13095), 0 states have call successors, (0), 0 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 17:35:03,520 INFO L175 Difference]: Start difference. First operand has 765 places, 2351 transitions, 89585 flow. Second operand 26 states and 5465 transitions. [2022-12-13 17:35:03,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 2475 transitions, 98356 flow [2022-12-13 17:35:37,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 2475 transitions, 96272 flow, removed 980 selfloop flow, removed 9 redundant places. [2022-12-13 17:35:37,240 INFO L231 Difference]: Finished difference. Result has 786 places, 2375 transitions, 92298 flow [2022-12-13 17:35:37,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=86787, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=92298, PETRI_PLACES=786, PETRI_TRANSITIONS=2375} [2022-12-13 17:35:37,242 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 757 predicate places. [2022-12-13 17:35:37,242 INFO L495 AbstractCegarLoop]: Abstraction has has 786 places, 2375 transitions, 92298 flow [2022-12-13 17:35:37,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 206.8125) internal successors, (3309), 16 states have internal predecessors, (3309), 0 states have call successors, (0), 0 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 17:35:37,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:35:37,242 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:35:37,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-13 17:35:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:37,443 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:35:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:35:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash -724701628, now seen corresponding path program 66 times [2022-12-13 17:35:37,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:35:37,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654490815] [2022-12-13 17:35:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:35:37,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:35:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:35:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:37,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:35:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654490815] [2022-12-13 17:35:37,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654490815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:35:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797249401] [2022-12-13 17:35:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:35:37,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:35:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:35:37,503 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:35:37,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-13 17:35:37,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:35:37,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:35:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:35:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:35:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:37,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:35:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:35:37,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797249401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:35:37,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:35:37,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 17:35:37,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193967065] [2022-12-13 17:35:37,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:35:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:35:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:35:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:35:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:35:37,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:35:37,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 786 places, 2375 transitions, 92298 flow. Second operand has 18 states, 18 states have (on average 206.66666666666666) internal successors, (3720), 18 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 17:35:37,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:35:37,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:35:37,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:35:55,649 INFO L130 PetriNetUnfolder]: 6873/13796 cut-off events. [2022-12-13 17:35:55,649 INFO L131 PetriNetUnfolder]: For 1547862/1547862 co-relation queries the response was YES. [2022-12-13 17:35:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216987 conditions, 13796 events. 6873/13796 cut-off events. For 1547862/1547862 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 129801 event pairs, 1082 based on Foata normal form. 16/13812 useless extension candidates. Maximal degree in co-relation 216712. Up to 4296 conditions per place. [2022-12-13 17:35:55,930 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1596 selfloop transitions, 1002 changer transitions 6/2604 dead transitions. [2022-12-13 17:35:55,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 2604 transitions, 105101 flow [2022-12-13 17:35:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 17:35:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 17:35:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6712 transitions. [2022-12-13 17:35:55,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43247422680412373 [2022-12-13 17:35:55,935 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6712 transitions. [2022-12-13 17:35:55,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6712 transitions. [2022-12-13 17:35:55,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:35:55,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6712 transitions. [2022-12-13 17:35:55,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 209.75) internal successors, (6712), 32 states have internal predecessors, (6712), 0 states have call successors, (0), 0 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 17:35:55,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 485.0) internal successors, (16005), 33 states have internal predecessors, (16005), 0 states have call successors, (0), 0 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 17:35:55,948 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 485.0) internal successors, (16005), 33 states have internal predecessors, (16005), 0 states have call successors, (0), 0 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 17:35:55,948 INFO L175 Difference]: Start difference. First operand has 786 places, 2375 transitions, 92298 flow. Second operand 32 states and 6712 transitions. [2022-12-13 17:35:55,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 2604 transitions, 105101 flow [2022-12-13 17:36:36,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 2604 transitions, 103682 flow, removed 582 selfloop flow, removed 14 redundant places. [2022-12-13 17:36:36,084 INFO L231 Difference]: Finished difference. Result has 814 places, 2490 transitions, 100034 flow [2022-12-13 17:36:36,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=90859, PETRI_DIFFERENCE_MINUEND_PLACES=770, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=100034, PETRI_PLACES=814, PETRI_TRANSITIONS=2490} [2022-12-13 17:36:36,086 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 785 predicate places. [2022-12-13 17:36:36,086 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 2490 transitions, 100034 flow [2022-12-13 17:36:36,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.66666666666666) internal successors, (3720), 18 states have internal predecessors, (3720), 0 states have call successors, (0), 0 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 17:36:36,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:36:36,086 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:36:36,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-13 17:36:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:36:36,287 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:36:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:36:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -171435494, now seen corresponding path program 67 times [2022-12-13 17:36:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:36:36,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020202103] [2022-12-13 17:36:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:36:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:36:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:36:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:36:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020202103] [2022-12-13 17:36:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020202103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:36:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812700274] [2022-12-13 17:36:36,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:36:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:36:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:36:36,393 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:36:36,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-13 17:36:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:36:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:36:36,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:36:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:36:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:36:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812700274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:36:36,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:36:36,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-13 17:36:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572841460] [2022-12-13 17:36:36,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:36:36,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:36:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:36:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:36:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:36:36,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:36:36,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 2490 transitions, 100034 flow. Second operand has 17 states, 17 states have (on average 206.76470588235293) internal successors, (3515), 17 states have internal predecessors, (3515), 0 states have call successors, (0), 0 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 17:36:36,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:36:36,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:36:36,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:36:58,857 INFO L130 PetriNetUnfolder]: 7382/14923 cut-off events. [2022-12-13 17:36:58,857 INFO L131 PetriNetUnfolder]: For 1886495/1886495 co-relation queries the response was YES. [2022-12-13 17:36:59,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240947 conditions, 14923 events. 7382/14923 cut-off events. For 1886495/1886495 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 142867 event pairs, 2357 based on Foata normal form. 58/14981 useless extension candidates. Maximal degree in co-relation 240659. Up to 11263 conditions per place. [2022-12-13 17:36:59,162 INFO L137 encePairwiseOnDemand]: 480/485 looper letters, 2201 selfloop transitions, 532 changer transitions 0/2733 dead transitions. [2022-12-13 17:36:59,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 2733 transitions, 114105 flow [2022-12-13 17:36:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:36:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:36:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4222 transitions. [2022-12-13 17:36:59,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4352577319587629 [2022-12-13 17:36:59,165 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4222 transitions. [2022-12-13 17:36:59,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4222 transitions. [2022-12-13 17:36:59,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:36:59,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4222 transitions. [2022-12-13 17:36:59,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 211.1) internal successors, (4222), 20 states have internal predecessors, (4222), 0 states have call successors, (0), 0 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 17:36:59,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:36:59,172 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 485.0) internal successors, (10185), 21 states have internal predecessors, (10185), 0 states have call successors, (0), 0 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 17:36:59,172 INFO L175 Difference]: Start difference. First operand has 814 places, 2490 transitions, 100034 flow. Second operand 20 states and 4222 transitions. [2022-12-13 17:36:59,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 2733 transitions, 114105 flow [2022-12-13 17:37:47,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2733 transitions, 111718 flow, removed 945 selfloop flow, removed 11 redundant places. [2022-12-13 17:37:47,899 INFO L231 Difference]: Finished difference. Result has 820 places, 2608 transitions, 104347 flow [2022-12-13 17:37:47,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=97263, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2026, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=104347, PETRI_PLACES=820, PETRI_TRANSITIONS=2608} [2022-12-13 17:37:47,900 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 791 predicate places. [2022-12-13 17:37:47,900 INFO L495 AbstractCegarLoop]: Abstraction has has 820 places, 2608 transitions, 104347 flow [2022-12-13 17:37:47,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 206.76470588235293) internal successors, (3515), 17 states have internal predecessors, (3515), 0 states have call successors, (0), 0 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 17:37:47,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:47,901 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:47,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-13 17:37:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-12-13 17:37:48,101 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:37:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1853752474, now seen corresponding path program 68 times [2022-12-13 17:37:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308284798] [2022-12-13 17:37:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:48,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:48,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308284798] [2022-12-13 17:37:48,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308284798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:37:48,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955512655] [2022-12-13 17:37:48,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:37:48,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:37:48,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:37:48,159 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:37:48,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-13 17:37:48,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:37:48,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:37:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:37:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:37:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:48,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:37:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:37:48,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955512655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:37:48,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:37:48,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-13 17:37:48,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776196802] [2022-12-13 17:37:48,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:37:48,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:37:48,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:37:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:37:48,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:37:48,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 2608 transitions, 104347 flow. Second operand has 17 states, 17 states have (on average 206.7058823529412) internal successors, (3514), 17 states have internal predecessors, (3514), 0 states have call successors, (0), 0 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 17:37:48,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:48,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:37:48,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:08,508 INFO L130 PetriNetUnfolder]: 7362/14855 cut-off events. [2022-12-13 17:38:08,508 INFO L131 PetriNetUnfolder]: For 1801939/1801939 co-relation queries the response was YES. [2022-12-13 17:38:08,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240269 conditions, 14855 events. 7362/14855 cut-off events. For 1801939/1801939 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 141867 event pairs, 1270 based on Foata normal form. 20/14875 useless extension candidates. Maximal degree in co-relation 239979. Up to 4902 conditions per place. [2022-12-13 17:38:08,832 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1758 selfloop transitions, 912 changer transitions 8/2678 dead transitions. [2022-12-13 17:38:08,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 2678 transitions, 110841 flow [2022-12-13 17:38:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:38:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 17:38:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5663 transitions. [2022-12-13 17:38:08,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43245513554791903 [2022-12-13 17:38:08,836 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5663 transitions. [2022-12-13 17:38:08,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5663 transitions. [2022-12-13 17:38:08,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:08,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5663 transitions. [2022-12-13 17:38:08,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 209.74074074074073) internal successors, (5663), 27 states have internal predecessors, (5663), 0 states have call successors, (0), 0 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 17:38:08,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 485.0) internal successors, (13580), 28 states have internal predecessors, (13580), 0 states have call successors, (0), 0 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 17:38:08,844 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 485.0) internal successors, (13580), 28 states have internal predecessors, (13580), 0 states have call successors, (0), 0 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 17:38:08,845 INFO L175 Difference]: Start difference. First operand has 820 places, 2608 transitions, 104347 flow. Second operand 27 states and 5663 transitions. [2022-12-13 17:38:08,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 2678 transitions, 110841 flow [2022-12-13 17:38:55,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 836 places, 2678 transitions, 109712 flow, removed 535 selfloop flow, removed 9 redundant places. [2022-12-13 17:38:55,990 INFO L231 Difference]: Finished difference. Result has 837 places, 2594 transitions, 104800 flow [2022-12-13 17:38:55,992 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=102881, PETRI_DIFFERENCE_MINUEND_PLACES=810, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=907, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=104800, PETRI_PLACES=837, PETRI_TRANSITIONS=2594} [2022-12-13 17:38:55,992 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 808 predicate places. [2022-12-13 17:38:55,992 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 2594 transitions, 104800 flow [2022-12-13 17:38:55,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 206.7058823529412) internal successors, (3514), 17 states have internal predecessors, (3514), 0 states have call successors, (0), 0 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 17:38:55,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:55,992 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:55,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-13 17:38:56,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-12-13 17:38:56,193 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:38:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:56,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1193828860, now seen corresponding path program 69 times [2022-12-13 17:38:56,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:56,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23870501] [2022-12-13 17:38:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:56,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:56,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23870501] [2022-12-13 17:38:56,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23870501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:38:56,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011055548] [2022-12-13 17:38:56,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:38:56,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:38:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:38:56,296 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:38:56,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-13 17:38:56,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:38:56,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:38:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:38:56,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:38:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:56,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:38:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:38:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011055548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:38:56,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:38:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 17:38:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682461969] [2022-12-13 17:38:56,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:38:56,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:38:56,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:38:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:38:56,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:38:56,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 2594 transitions, 104800 flow. Second operand has 14 states, 14 states have (on average 206.85714285714286) internal successors, (2896), 14 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 17:38:56,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:56,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:38:56,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:39:15,863 INFO L130 PetriNetUnfolder]: 7375/14884 cut-off events. [2022-12-13 17:39:15,863 INFO L131 PetriNetUnfolder]: For 1859918/1859918 co-relation queries the response was YES. [2022-12-13 17:39:16,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243106 conditions, 14884 events. 7375/14884 cut-off events. For 1859918/1859918 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 142519 event pairs, 1457 based on Foata normal form. 2/14886 useless extension candidates. Maximal degree in co-relation 242815. Up to 7686 conditions per place. [2022-12-13 17:39:16,175 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 1840 selfloop transitions, 801 changer transitions 7/2648 dead transitions. [2022-12-13 17:39:16,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 2648 transitions, 111738 flow [2022-12-13 17:39:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:39:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:39:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2935 transitions. [2022-12-13 17:39:16,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4322533136966127 [2022-12-13 17:39:16,177 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2935 transitions. [2022-12-13 17:39:16,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2935 transitions. [2022-12-13 17:39:16,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:39:16,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2935 transitions. [2022-12-13 17:39:16,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 209.64285714285714) internal successors, (2935), 14 states have internal predecessors, (2935), 0 states have call successors, (0), 0 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 17:39:16,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:39:16,182 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 485.0) internal successors, (7275), 15 states have internal predecessors, (7275), 0 states have call successors, (0), 0 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 17:39:16,182 INFO L175 Difference]: Start difference. First operand has 837 places, 2594 transitions, 104800 flow. Second operand 14 states and 2935 transitions. [2022-12-13 17:39:16,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 845 places, 2648 transitions, 111738 flow [2022-12-13 17:40:02,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 2648 transitions, 110761 flow, removed 51 selfloop flow, removed 10 redundant places. [2022-12-13 17:40:02,462 INFO L231 Difference]: Finished difference. Result has 841 places, 2602 transitions, 106720 flow [2022-12-13 17:40:02,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=103833, PETRI_DIFFERENCE_MINUEND_PLACES=822, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=106720, PETRI_PLACES=841, PETRI_TRANSITIONS=2602} [2022-12-13 17:40:02,463 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 812 predicate places. [2022-12-13 17:40:02,463 INFO L495 AbstractCegarLoop]: Abstraction has has 841 places, 2602 transitions, 106720 flow [2022-12-13 17:40:02,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 206.85714285714286) internal successors, (2896), 14 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 17:40:02,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:40:02,464 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:40:02,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-12-13 17:40:02,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:02,665 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 17:40:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:40:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash -651887783, now seen corresponding path program 70 times [2022-12-13 17:40:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:40:02,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434518655] [2022-12-13 17:40:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:40:02,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:40:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:40:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:40:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:40:02,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434518655] [2022-12-13 17:40:02,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434518655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:40:02,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879392488] [2022-12-13 17:40:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:40:02,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:40:02,760 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:40:02,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7738bb85-1856-40a9-9675-91ae3526287d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-13 17:40:02,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:40:02,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:40:02,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:40:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:40:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:40:02,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:40:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:40:02,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879392488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:40:02,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:40:02,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-13 17:40:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436024115] [2022-12-13 17:40:02,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:40:02,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:40:02,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:40:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:40:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:40:02,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 485 [2022-12-13 17:40:02,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 2602 transitions, 106720 flow. Second operand has 15 states, 15 states have (on average 207.0) internal successors, (3105), 15 states have internal predecessors, (3105), 0 states have call successors, (0), 0 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 17:40:02,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:40:02,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 485 [2022-12-13 17:40:02,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:40:23,298 INFO L130 PetriNetUnfolder]: 7672/15495 cut-off events. [2022-12-13 17:40:23,298 INFO L131 PetriNetUnfolder]: For 2062789/2062789 co-relation queries the response was YES. [2022-12-13 17:40:23,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261141 conditions, 15495 events. 7672/15495 cut-off events. For 2062789/2062789 co-relation queries the response was YES. Maximal size of possible extension queue 1371. Compared 148996 event pairs, 625 based on Foata normal form. 122/15617 useless extension candidates. Maximal degree in co-relation 260845. Up to 11056 conditions per place. [2022-12-13 17:40:23,657 INFO L137 encePairwiseOnDemand]: 479/485 looper letters, 2168 selfloop transitions, 727 changer transitions 0/2895 dead transitions. [2022-12-13 17:40:23,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 2895 transitions, 124158 flow [2022-12-13 17:40:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:40:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 17:40:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4846 transitions. [2022-12-13 17:40:23,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43442402510085165 [2022-12-13 17:40:23,661 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4846 transitions. [2022-12-13 17:40:23,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4846 transitions. [2022-12-13 17:40:23,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:40:23,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4846 transitions. [2022-12-13 17:40:23,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 210.69565217391303) internal successors, (4846), 23 states have internal predecessors, (4846), 0 states have call successors, (0), 0 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 17:40:23,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 485.0) internal successors, (11640), 24 states have internal predecessors, (11640), 0 states have call successors, (0), 0 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 17:40:23,669 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 485.0) internal successors, (11640), 24 states have internal predecessors, (11640), 0 states have call successors, (0), 0 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 17:40:23,669 INFO L175 Difference]: Start difference. First operand has 841 places, 2602 transitions, 106720 flow. Second operand 23 states and 4846 transitions. [2022-12-13 17:40:23,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 2895 transitions, 124158 flow