./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/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_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/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_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- 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 13:34:12,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:34:12,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:34:12,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:34:12,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:34:12,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:34:12,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:34:12,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:34:12,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:34:12,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:34:12,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:34:12,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:34:12,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:34:12,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:34:12,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:34:12,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:34:12,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:34:12,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:34:12,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:34:12,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:34:12,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:34:12,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:34:12,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:34:12,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:34:12,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:34:12,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:34:12,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:34:12,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:34:12,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:34:12,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:34:12,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:34:12,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:34:12,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:34:12,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:34:12,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:34:12,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:34:12,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:34:12,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:34:12,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:34:12,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:34:12,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:34:12,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:34:12,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:34:12,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:34:12,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:34:12,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:34:12,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:34:12,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:34:12,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:34:12,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:34:12,884 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:34:12,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:34:12,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:34:12,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:34:12,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:34:12,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:34:12,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:34:12,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:34:12,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:34:12,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:34:12,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:34:12,887 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:34:12,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:34:12,888 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:34:12,888 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_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-12-13 13:34:13,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:34:13,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:34:13,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:34:13,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:34:13,100 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:34:13,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack-1.i [2022-12-13 13:34:15,621 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:34:15,812 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:34:15,812 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/sv-benchmarks/c/pthread/stack-1.i [2022-12-13 13:34:15,821 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/data/c53f918e2/1824d4b8ead04cbc862a91c0cd63784b/FLAG68045c7a0 [2022-12-13 13:34:16,218 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/data/c53f918e2/1824d4b8ead04cbc862a91c0cd63784b [2022-12-13 13:34:16,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:34:16,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:34:16,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:34:16,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:34:16,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:34:16,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24fe1a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16, skipping insertion in model container [2022-12-13 13:34:16,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:34:16,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:34:16,540 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_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-12-13 13:34:16,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:34:16,568 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:34:16,595 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_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-12-13 13:34:16,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:34:16,636 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:34:16,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16 WrapperNode [2022-12-13 13:34:16,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:34:16,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:34:16,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:34:16,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:34:16,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,672 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 152 [2022-12-13 13:34:16,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:34:16,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:34:16,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:34:16,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:34:16,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,691 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:34:16,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:34:16,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:34:16,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:34:16,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (1/1) ... [2022-12-13 13:34:16,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:34:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:16,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:34:16,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:34:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 13:34:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 13:34:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 13:34:16,759 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 13:34:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:34:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:34:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:34:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:34:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:34:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:34:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:34:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:34:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:34:16,761 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 13:34:16,867 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:34:16,868 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:34:17,107 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:34:17,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:34:17,116 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 13:34:17,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:34:17 BoogieIcfgContainer [2022-12-13 13:34:17,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:34:17,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:34:17,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:34:17,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:34:17,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:34:16" (1/3) ... [2022-12-13 13:34:17,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c45afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:34:17, skipping insertion in model container [2022-12-13 13:34:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:34:16" (2/3) ... [2022-12-13 13:34:17,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c45afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:34:17, skipping insertion in model container [2022-12-13 13:34:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:34:17" (3/3) ... [2022-12-13 13:34:17,127 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-12-13 13:34:17,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:34:17,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 13:34:17,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:34:17,233 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:34:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 190 transitions, 396 flow [2022-12-13 13:34:17,338 INFO L130 PetriNetUnfolder]: 10/188 cut-off events. [2022-12-13 13:34:17,338 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:34:17,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 10/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 492 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-12-13 13:34:17,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 190 transitions, 396 flow [2022-12-13 13:34:17,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 183 transitions, 378 flow [2022-12-13 13:34:17,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:34:17,358 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 183 transitions, 378 flow [2022-12-13 13:34:17,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 183 transitions, 378 flow [2022-12-13 13:34:17,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 183 transitions, 378 flow [2022-12-13 13:34:17,393 INFO L130 PetriNetUnfolder]: 10/183 cut-off events. [2022-12-13 13:34:17,394 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:34:17,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 10/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 479 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-12-13 13:34:17,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2022-12-13 13:34:21,152 INFO L134 LiptonReduction]: Checked pairs total: 14315 [2022-12-13 13:34:21,152 INFO L136 LiptonReduction]: Total number of compositions: 194 [2022-12-13 13:34:21,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:34:21,167 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;@5836acc3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:34:21,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-13 13:34:21,168 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 13:34:21,168 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:34:21,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:21,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 13:34:21,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash 776, now seen corresponding path program 1 times [2022-12-13 13:34:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211518388] [2022-12-13 13:34:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:21,264 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 13:34:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211518388] [2022-12-13 13:34:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211518388] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:21,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 13:34:21,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145640170] [2022-12-13 13:34:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:34:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:34:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:34:21,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 384 [2022-12-13 13:34:21,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:21,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 384 [2022-12-13 13:34:21,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:21,539 INFO L130 PetriNetUnfolder]: 1445/2224 cut-off events. [2022-12-13 13:34:21,539 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 13:34:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 2224 events. 1445/2224 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10070 event pairs, 1169 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 4224. Up to 2225 conditions per place. [2022-12-13 13:34:21,555 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 44 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-12-13 13:34:21,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 188 flow [2022-12-13 13:34:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:34:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:34:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 404 transitions. [2022-12-13 13:34:21,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2022-12-13 13:34:21,570 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 404 transitions. [2022-12-13 13:34:21,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 404 transitions. [2022-12-13 13:34:21,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:21,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 404 transitions. [2022-12-13 13:34:21,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.0) internal successors, (404), 2 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,583 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,584 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 404 transitions. [2022-12-13 13:34:21,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 188 flow [2022-12-13 13:34:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:34:21,588 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-12-13 13:34:21,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-12-13 13:34:21,592 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-12-13 13:34:21,593 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-12-13 13:34:21,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:21,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:34:21,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:34:21,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:21,594 INFO L85 PathProgramCache]: Analyzing trace with hash 761499, now seen corresponding path program 1 times [2022-12-13 13:34:21,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:21,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159897408] [2022-12-13 13:34:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:21,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:21,753 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 13:34:21,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159897408] [2022-12-13 13:34:21,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159897408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:21,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:21,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:34:21,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361285828] [2022-12-13 13:34:21,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:21,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:21,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:21,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:21,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:21,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 384 [2022-12-13 13:34:21,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:21,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 384 [2022-12-13 13:34:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:21,958 INFO L130 PetriNetUnfolder]: 1416/2169 cut-off events. [2022-12-13 13:34:21,958 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 13:34:21,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 2169 events. 1416/2169 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9729 event pairs, 1145 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 4351. Up to 2168 conditions per place. [2022-12-13 13:34:21,974 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-12-13 13:34:21,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 172 flow [2022-12-13 13:34:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-12-13 13:34:21,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4913194444444444 [2022-12-13 13:34:21,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-12-13 13:34:21,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-12-13 13:34:21,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:21,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-12-13 13:34:21,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,981 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 566 transitions. [2022-12-13 13:34:21,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 172 flow [2022-12-13 13:34:21,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:34:21,982 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-12-13 13:34:21,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-12-13 13:34:21,983 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-12-13 13:34:21,983 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-12-13 13:34:21,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:21,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:21,983 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:34:21,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:34:21,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:21,984 INFO L85 PathProgramCache]: Analyzing trace with hash 761500, now seen corresponding path program 1 times [2022-12-13 13:34:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:21,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153458686] [2022-12-13 13:34:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:21,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:22,033 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 13:34:22,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153458686] [2022-12-13 13:34:22,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153458686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:22,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:22,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:34:22,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679164730] [2022-12-13 13:34:22,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:22,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:22,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:22,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:22,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 384 [2022-12-13 13:34:22,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:22,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 384 [2022-12-13 13:34:22,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:22,234 INFO L130 PetriNetUnfolder]: 1387/2114 cut-off events. [2022-12-13 13:34:22,235 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 13:34:22,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4247 conditions, 2114 events. 1387/2114 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9367 event pairs, 1121 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 4243. Up to 2113 conditions per place. [2022-12-13 13:34:22,242 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-12-13 13:34:22,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-12-13 13:34:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2022-12-13 13:34:22,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2022-12-13 13:34:22,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2022-12-13 13:34:22,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2022-12-13 13:34:22,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:22,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2022-12-13 13:34:22,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,250 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 552 transitions. [2022-12-13 13:34:22,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-12-13 13:34:22,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:22,251 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-12-13 13:34:22,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-12-13 13:34:22,252 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-12-13 13:34:22,252 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-12-13 13:34:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:22,252 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:34:22,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:34:22,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 731817315, now seen corresponding path program 1 times [2022-12-13 13:34:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715117478] [2022-12-13 13:34:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:22,293 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 13:34:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715117478] [2022-12-13 13:34:22,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715117478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:22,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:22,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:34:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213094137] [2022-12-13 13:34:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:22,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:22,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:22,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 384 [2022-12-13 13:34:22,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:22,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 384 [2022-12-13 13:34:22,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:22,465 INFO L130 PetriNetUnfolder]: 1013/1572 cut-off events. [2022-12-13 13:34:22,465 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 13:34:22,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163 conditions, 1572 events. 1013/1572 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6687 event pairs, 811 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 3159. Up to 1571 conditions per place. [2022-12-13 13:34:22,470 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-12-13 13:34:22,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-12-13 13:34:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2022-12-13 13:34:22,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4800347222222222 [2022-12-13 13:34:22,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2022-12-13 13:34:22,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2022-12-13 13:34:22,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:22,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2022-12-13 13:34:22,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,476 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 553 transitions. [2022-12-13 13:34:22,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-12-13 13:34:22,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:22,477 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-12-13 13:34:22,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-12-13 13:34:22,478 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-12-13 13:34:22,478 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-12-13 13:34:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:22,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:34:22,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:34:22,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash 731817314, now seen corresponding path program 1 times [2022-12-13 13:34:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:22,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374022086] [2022-12-13 13:34:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:22,550 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 13:34:22,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:22,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374022086] [2022-12-13 13:34:22,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374022086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:22,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:22,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:22,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517807941] [2022-12-13 13:34:22,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:22,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:34:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:34:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:34:22,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2022-12-13 13:34:22,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:22,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2022-12-13 13:34:22,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:22,716 INFO L130 PetriNetUnfolder]: 639/1030 cut-off events. [2022-12-13 13:34:22,716 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 13:34:22,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 1030 events. 639/1030 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4193 event pairs, 501 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 2075. Up to 1029 conditions per place. [2022-12-13 13:34:22,719 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 36 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-12-13 13:34:22,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 160 flow [2022-12-13 13:34:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2022-12-13 13:34:22,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4661458333333333 [2022-12-13 13:34:22,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2022-12-13 13:34:22,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2022-12-13 13:34:22,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:22,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2022-12-13 13:34:22,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,728 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 537 transitions. [2022-12-13 13:34:22,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 160 flow [2022-12-13 13:34:22,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:22,728 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-12-13 13:34:22,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-13 13:34:22,729 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-12-13 13:34:22,729 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-12-13 13:34:22,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:22,729 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:22,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:34:22,730 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1211273578, now seen corresponding path program 1 times [2022-12-13 13:34:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:22,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817326187] [2022-12-13 13:34:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:22,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:22,767 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 13:34:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:22,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817326187] [2022-12-13 13:34:22,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817326187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:22,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:22,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300004380] [2022-12-13 13:34:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:22,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:22,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:22,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 384 [2022-12-13 13:34:22,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:22,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 384 [2022-12-13 13:34:22,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:22,938 INFO L130 PetriNetUnfolder]: 865/1422 cut-off events. [2022-12-13 13:34:22,938 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 13:34:22,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2873 conditions, 1422 events. 865/1422 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5767 event pairs, 393 based on Foata normal form. 0/1018 useless extension candidates. Maximal degree in co-relation 2869. Up to 943 conditions per place. [2022-12-13 13:34:22,943 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 60 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2022-12-13 13:34:22,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 265 flow [2022-12-13 13:34:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-12-13 13:34:22,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5043402777777778 [2022-12-13 13:34:22,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-12-13 13:34:22,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-12-13 13:34:22,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:22,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-12-13 13:34:22,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,947 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 3 states and 581 transitions. [2022-12-13 13:34:22,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 265 flow [2022-12-13 13:34:22,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 63 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:22,949 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 97 flow [2022-12-13 13:34:22,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-12-13 13:34:22,949 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-12-13 13:34:22,949 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 97 flow [2022-12-13 13:34:22,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:22,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:22,950 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:22,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:34:22,950 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1211272056, now seen corresponding path program 1 times [2022-12-13 13:34:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199098706] [2022-12-13 13:34:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:23,048 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 13:34:23,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199098706] [2022-12-13 13:34:23,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199098706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:23,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:23,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491061599] [2022-12-13 13:34:23,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:23,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:34:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:34:23,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:34:23,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 384 [2022-12-13 13:34:23,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:23,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 384 [2022-12-13 13:34:23,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:23,294 INFO L130 PetriNetUnfolder]: 827/1363 cut-off events. [2022-12-13 13:34:23,294 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-12-13 13:34:23,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 1363 events. 827/1363 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5600 event pairs, 294 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 2883. Up to 1262 conditions per place. [2022-12-13 13:34:23,298 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 48 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2022-12-13 13:34:23,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 230 flow [2022-12-13 13:34:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:34:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:34:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2022-12-13 13:34:23,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4817708333333333 [2022-12-13 13:34:23,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2022-12-13 13:34:23,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2022-12-13 13:34:23,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:23,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2022-12-13 13:34:23,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,304 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 97 flow. Second operand 4 states and 740 transitions. [2022-12-13 13:34:23,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 230 flow [2022-12-13 13:34:23,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:23,306 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 109 flow [2022-12-13 13:34:23,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2022-12-13 13:34:23,307 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2022-12-13 13:34:23,307 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 109 flow [2022-12-13 13:34:23,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:23,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:34:23,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:34:23,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1211272055, now seen corresponding path program 1 times [2022-12-13 13:34:23,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:23,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954060656] [2022-12-13 13:34:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:23,476 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 13:34:23,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:23,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954060656] [2022-12-13 13:34:23,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954060656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:23,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:23,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:23,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813523820] [2022-12-13 13:34:23,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:23,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:34:23,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:34:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:34:23,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 384 [2022-12-13 13:34:23,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:23,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 384 [2022-12-13 13:34:23,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:23,780 INFO L130 PetriNetUnfolder]: 881/1454 cut-off events. [2022-12-13 13:34:23,781 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2022-12-13 13:34:23,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3133 conditions, 1454 events. 881/1454 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6106 event pairs, 342 based on Foata normal form. 0/1220 useless extension candidates. Maximal degree in co-relation 3127. Up to 1211 conditions per place. [2022-12-13 13:34:23,786 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 62 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2022-12-13 13:34:23,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 65 transitions, 295 flow [2022-12-13 13:34:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:34:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:34:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 749 transitions. [2022-12-13 13:34:23,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4876302083333333 [2022-12-13 13:34:23,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 749 transitions. [2022-12-13 13:34:23,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 749 transitions. [2022-12-13 13:34:23,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:23,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 749 transitions. [2022-12-13 13:34:23,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,792 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,792 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 109 flow. Second operand 4 states and 749 transitions. [2022-12-13 13:34:23,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 65 transitions, 295 flow [2022-12-13 13:34:23,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 65 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:23,793 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2022-12-13 13:34:23,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 13:34:23,794 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-12-13 13:34:23,794 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2022-12-13 13:34:23,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:23,794 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:23,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:34:23,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2040376258, now seen corresponding path program 1 times [2022-12-13 13:34:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:23,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063638826] [2022-12-13 13:34:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:23,827 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 13:34:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063638826] [2022-12-13 13:34:23,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063638826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:23,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:23,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478240937] [2022-12-13 13:34:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:23,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 384 [2022-12-13 13:34:23,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:23,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 384 [2022-12-13 13:34:23,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:24,007 INFO L130 PetriNetUnfolder]: 947/1562 cut-off events. [2022-12-13 13:34:24,007 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-12-13 13:34:24,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 1562 events. 947/1562 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7245 event pairs, 485 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 3436. Up to 1443 conditions per place. [2022-12-13 13:34:24,014 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 57 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2022-12-13 13:34:24,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 289 flow [2022-12-13 13:34:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-12-13 13:34:24,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5060763888888888 [2022-12-13 13:34:24,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-12-13 13:34:24,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-12-13 13:34:24,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:24,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-12-13 13:34:24,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,021 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 583 transitions. [2022-12-13 13:34:24,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 289 flow [2022-12-13 13:34:24,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:24,024 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 136 flow [2022-12-13 13:34:24,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 13:34:24,024 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-12-13 13:34:24,024 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 136 flow [2022-12-13 13:34:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:24,025 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:24,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:34:24,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:24,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1607805819, now seen corresponding path program 1 times [2022-12-13 13:34:24,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:24,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875882891] [2022-12-13 13:34:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:24,050 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 13:34:24,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:24,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875882891] [2022-12-13 13:34:24,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875882891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:24,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:24,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:34:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680589888] [2022-12-13 13:34:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:24,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:24,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:24,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 384 [2022-12-13 13:34:24,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:24,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 384 [2022-12-13 13:34:24,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:24,236 INFO L130 PetriNetUnfolder]: 986/1619 cut-off events. [2022-12-13 13:34:24,236 INFO L131 PetriNetUnfolder]: For 354/354 co-relation queries the response was YES. [2022-12-13 13:34:24,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3854 conditions, 1619 events. 986/1619 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7521 event pairs, 402 based on Foata normal form. 12/1419 useless extension candidates. Maximal degree in co-relation 3846. Up to 1368 conditions per place. [2022-12-13 13:34:24,242 INFO L137 encePairwiseOnDemand]: 381/384 looper letters, 63 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2022-12-13 13:34:24,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 318 flow [2022-12-13 13:34:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2022-12-13 13:34:24,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5112847222222222 [2022-12-13 13:34:24,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2022-12-13 13:34:24,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2022-12-13 13:34:24,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:24,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2022-12-13 13:34:24,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,250 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 136 flow. Second operand 3 states and 589 transitions. [2022-12-13 13:34:24,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 318 flow [2022-12-13 13:34:24,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:24,253 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 140 flow [2022-12-13 13:34:24,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-12-13 13:34:24,254 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2022-12-13 13:34:24,254 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 140 flow [2022-12-13 13:34:24,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:24,255 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:24,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:34:24,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1825445197, now seen corresponding path program 1 times [2022-12-13 13:34:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565453007] [2022-12-13 13:34:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:24,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565453007] [2022-12-13 13:34:24,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565453007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:24,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93419163] [2022-12-13 13:34:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:24,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:24,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:24,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:34:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 13:34:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:24,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,702 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:34:24,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 13:34:24,730 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 13:34:24,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 13:34:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:24,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:25,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93419163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:25,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:25,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-12-13 13:34:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009245204] [2022-12-13 13:34:25,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:25,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:34:25,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:34:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:34:25,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 384 [2022-12-13 13:34:25,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 140 flow. Second operand has 16 states, 16 states have (on average 164.4375) internal successors, (2631), 16 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:25,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:25,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 384 [2022-12-13 13:34:25,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:26,783 INFO L130 PetriNetUnfolder]: 2207/3644 cut-off events. [2022-12-13 13:34:26,784 INFO L131 PetriNetUnfolder]: For 1121/1121 co-relation queries the response was YES. [2022-12-13 13:34:26,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8796 conditions, 3644 events. 2207/3644 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18495 event pairs, 355 based on Foata normal form. 114/3300 useless extension candidates. Maximal degree in co-relation 8787. Up to 1494 conditions per place. [2022-12-13 13:34:26,802 INFO L137 encePairwiseOnDemand]: 375/384 looper letters, 165 selfloop transitions, 15 changer transitions 0/180 dead transitions. [2022-12-13 13:34:26,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 180 transitions, 859 flow [2022-12-13 13:34:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:34:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 13:34:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1801 transitions. [2022-12-13 13:34:26,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46901041666666665 [2022-12-13 13:34:26,808 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1801 transitions. [2022-12-13 13:34:26,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1801 transitions. [2022-12-13 13:34:26,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:26,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1801 transitions. [2022-12-13 13:34:26,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 180.1) internal successors, (1801), 10 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:26,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 384.0) internal successors, (4224), 11 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:26,820 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 384.0) internal successors, (4224), 11 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:26,820 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 140 flow. Second operand 10 states and 1801 transitions. [2022-12-13 13:34:26,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 180 transitions, 859 flow [2022-12-13 13:34:26,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 180 transitions, 856 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:26,826 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 265 flow [2022-12-13 13:34:26,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=265, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2022-12-13 13:34:26,827 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2022-12-13 13:34:26,827 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 265 flow [2022-12-13 13:34:26,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 164.4375) internal successors, (2631), 16 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:26,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:26,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:26,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:34:27,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:27,030 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2072672130, now seen corresponding path program 1 times [2022-12-13 13:34:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:27,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637305569] [2022-12-13 13:34:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:27,088 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 13:34:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:27,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637305569] [2022-12-13 13:34:27,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637305569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:27,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:27,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:34:27,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476670775] [2022-12-13 13:34:27,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:27,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 384 [2022-12-13 13:34:27,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:27,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 384 [2022-12-13 13:34:27,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:27,240 INFO L130 PetriNetUnfolder]: 651/1212 cut-off events. [2022-12-13 13:34:27,241 INFO L131 PetriNetUnfolder]: For 750/750 co-relation queries the response was YES. [2022-12-13 13:34:27,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 1212 events. 651/1212 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5448 event pairs, 97 based on Foata normal form. 60/1192 useless extension candidates. Maximal degree in co-relation 3176. Up to 944 conditions per place. [2022-12-13 13:34:27,244 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 50 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2022-12-13 13:34:27,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 363 flow [2022-12-13 13:34:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:27,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-12-13 13:34:27,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2022-12-13 13:34:27,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-12-13 13:34:27,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-12-13 13:34:27,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:27,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-12-13 13:34:27,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,249 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 265 flow. Second operand 3 states and 567 transitions. [2022-12-13 13:34:27,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 363 flow [2022-12-13 13:34:27,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 347 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 13:34:27,252 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 223 flow [2022-12-13 13:34:27,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-12-13 13:34:27,253 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2022-12-13 13:34:27,253 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 223 flow [2022-12-13 13:34:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:27,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:34:27,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash -297008148, now seen corresponding path program 1 times [2022-12-13 13:34:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242808718] [2022-12-13 13:34:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:27,311 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 13:34:27,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242808718] [2022-12-13 13:34:27,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242808718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:27,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:27,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:34:27,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510288569] [2022-12-13 13:34:27,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:34:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:34:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:34:27,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 384 [2022-12-13 13:34:27,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:27,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 384 [2022-12-13 13:34:27,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:27,676 INFO L130 PetriNetUnfolder]: 732/1354 cut-off events. [2022-12-13 13:34:27,676 INFO L131 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-12-13 13:34:27,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3648 conditions, 1354 events. 732/1354 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6038 event pairs, 79 based on Foata normal form. 0/1348 useless extension candidates. Maximal degree in co-relation 3635. Up to 707 conditions per place. [2022-12-13 13:34:27,680 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 77 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2022-12-13 13:34:27,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 523 flow [2022-12-13 13:34:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:34:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:34:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1249 transitions. [2022-12-13 13:34:27,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646577380952381 [2022-12-13 13:34:27,683 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1249 transitions. [2022-12-13 13:34:27,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1249 transitions. [2022-12-13 13:34:27,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:27,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1249 transitions. [2022-12-13 13:34:27,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.42857142857142) internal successors, (1249), 7 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,687 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 384.0) internal successors, (3072), 8 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,688 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 223 flow. Second operand 7 states and 1249 transitions. [2022-12-13 13:34:27,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 523 flow [2022-12-13 13:34:27,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 508 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:27,691 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 253 flow [2022-12-13 13:34:27,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2022-12-13 13:34:27,692 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2022-12-13 13:34:27,692 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 253 flow [2022-12-13 13:34:27,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:27,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:27,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:27,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:34:27,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1898104219, now seen corresponding path program 1 times [2022-12-13 13:34:27,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:27,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538885405] [2022-12-13 13:34:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:27,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:27,946 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 13:34:27,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:27,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538885405] [2022-12-13 13:34:27,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538885405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:27,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:27,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 13:34:27,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522123180] [2022-12-13 13:34:27,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:27,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:34:27,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:27,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:34:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:34:28,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 384 [2022-12-13 13:34:28,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 253 flow. Second operand has 12 states, 12 states have (on average 156.58333333333334) internal successors, (1879), 12 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:28,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:28,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 384 [2022-12-13 13:34:28,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:29,608 INFO L130 PetriNetUnfolder]: 1000/1852 cut-off events. [2022-12-13 13:34:29,609 INFO L131 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-12-13 13:34:29,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 1852 events. 1000/1852 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8456 event pairs, 135 based on Foata normal form. 0/1788 useless extension candidates. Maximal degree in co-relation 5016. Up to 772 conditions per place. [2022-12-13 13:34:29,613 INFO L137 encePairwiseOnDemand]: 371/384 looper letters, 165 selfloop transitions, 33 changer transitions 0/198 dead transitions. [2022-12-13 13:34:29,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 198 transitions, 1135 flow [2022-12-13 13:34:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:34:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 13:34:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3126 transitions. [2022-12-13 13:34:29,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4284539473684211 [2022-12-13 13:34:29,617 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3126 transitions. [2022-12-13 13:34:29,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3126 transitions. [2022-12-13 13:34:29,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:29,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3126 transitions. [2022-12-13 13:34:29,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 164.52631578947367) internal successors, (3126), 19 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,629 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 384.0) internal successors, (7680), 20 states have internal predecessors, (7680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,629 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 253 flow. Second operand 19 states and 3126 transitions. [2022-12-13 13:34:29,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 198 transitions, 1135 flow [2022-12-13 13:34:29,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 198 transitions, 1132 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:29,635 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 527 flow [2022-12-13 13:34:29,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=527, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2022-12-13 13:34:29,635 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 44 predicate places. [2022-12-13 13:34:29,635 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 527 flow [2022-12-13 13:34:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.58333333333334) internal successors, (1879), 12 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:29,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:29,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:34:29,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1078298407, now seen corresponding path program 1 times [2022-12-13 13:34:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:29,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417968038] [2022-12-13 13:34:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:29,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:34:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417968038] [2022-12-13 13:34:29,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417968038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:29,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:29,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:34:29,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059541762] [2022-12-13 13:34:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:29,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:29,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 384 [2022-12-13 13:34:29,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 527 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:29,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 384 [2022-12-13 13:34:29,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:29,952 INFO L130 PetriNetUnfolder]: 1256/2356 cut-off events. [2022-12-13 13:34:29,952 INFO L131 PetriNetUnfolder]: For 2813/2813 co-relation queries the response was YES. [2022-12-13 13:34:29,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7422 conditions, 2356 events. 1256/2356 cut-off events. For 2813/2813 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12213 event pairs, 791 based on Foata normal form. 78/2348 useless extension candidates. Maximal degree in co-relation 7392. Up to 1815 conditions per place. [2022-12-13 13:34:29,960 INFO L137 encePairwiseOnDemand]: 380/384 looper letters, 114 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-12-13 13:34:29,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 1029 flow [2022-12-13 13:34:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-12-13 13:34:29,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5121527777777778 [2022-12-13 13:34:29,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-12-13 13:34:29,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-12-13 13:34:29,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:29,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-12-13 13:34:29,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,964 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 527 flow. Second operand 3 states and 590 transitions. [2022-12-13 13:34:29,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 1029 flow [2022-12-13 13:34:29,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 117 transitions, 985 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:29,974 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 507 flow [2022-12-13 13:34:29,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=507, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2022-12-13 13:34:29,974 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 45 predicate places. [2022-12-13 13:34:29,974 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 507 flow [2022-12-13 13:34:29,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:29,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:29,975 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 13:34:29,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 13:34:29,975 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1259467946, now seen corresponding path program 1 times [2022-12-13 13:34:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:29,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127965191] [2022-12-13 13:34:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:30,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127965191] [2022-12-13 13:34:30,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127965191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741384743] [2022-12-13 13:34:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:30,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:30,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:30,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:30,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:34:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:30,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:34:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:30,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:30,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741384743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:30,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:30,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 13:34:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978433601] [2022-12-13 13:34:30,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:30,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:34:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:34:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:34:30,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 384 [2022-12-13 13:34:30,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 171.6153846153846) internal successors, (2231), 13 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 13:34:30,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:30,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 384 [2022-12-13 13:34:30,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:30,905 INFO L130 PetriNetUnfolder]: 2233/4160 cut-off events. [2022-12-13 13:34:30,905 INFO L131 PetriNetUnfolder]: For 6177/6177 co-relation queries the response was YES. [2022-12-13 13:34:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13981 conditions, 4160 events. 2233/4160 cut-off events. For 6177/6177 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 22197 event pairs, 549 based on Foata normal form. 108/4246 useless extension candidates. Maximal degree in co-relation 13949. Up to 901 conditions per place. [2022-12-13 13:34:30,921 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 206 selfloop transitions, 48 changer transitions 0/254 dead transitions. [2022-12-13 13:34:30,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 254 transitions, 1956 flow [2022-12-13 13:34:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:34:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 13:34:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2386 transitions. [2022-12-13 13:34:30,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4779647435897436 [2022-12-13 13:34:30,924 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2386 transitions. [2022-12-13 13:34:30,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2386 transitions. [2022-12-13 13:34:30,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:30,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2386 transitions. [2022-12-13 13:34:30,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.53846153846155) internal successors, (2386), 13 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 384.0) internal successors, (5376), 14 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,933 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 384.0) internal successors, (5376), 14 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,933 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 507 flow. Second operand 13 states and 2386 transitions. [2022-12-13 13:34:30,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 254 transitions, 1956 flow [2022-12-13 13:34:30,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 254 transitions, 1934 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:30,952 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 933 flow [2022-12-13 13:34:30,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=933, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2022-12-13 13:34:30,952 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 62 predicate places. [2022-12-13 13:34:30,953 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 933 flow [2022-12-13 13:34:30,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.6153846153846) internal successors, (2231), 13 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 13:34:30,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:30,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:30,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:34:31,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 13:34:31,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:31,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1544304688, now seen corresponding path program 1 times [2022-12-13 13:34:31,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:31,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046522477] [2022-12-13 13:34:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:31,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:31,636 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 13:34:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:31,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046522477] [2022-12-13 13:34:31,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046522477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:31,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:31,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 13:34:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016883201] [2022-12-13 13:34:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:31,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:34:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:34:31,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:34:32,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 384 [2022-12-13 13:34:32,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 933 flow. Second operand has 15 states, 15 states have (on average 147.4) internal successors, (2211), 15 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:32,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:32,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 384 [2022-12-13 13:34:32,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:33,675 INFO L130 PetriNetUnfolder]: 2453/4576 cut-off events. [2022-12-13 13:34:33,675 INFO L131 PetriNetUnfolder]: For 8849/8849 co-relation queries the response was YES. [2022-12-13 13:34:33,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16441 conditions, 4576 events. 2453/4576 cut-off events. For 8849/8849 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 24991 event pairs, 758 based on Foata normal form. 12/4562 useless extension candidates. Maximal degree in co-relation 16403. Up to 3898 conditions per place. [2022-12-13 13:34:33,692 INFO L137 encePairwiseOnDemand]: 367/384 looper letters, 186 selfloop transitions, 30 changer transitions 0/216 dead transitions. [2022-12-13 13:34:33,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 216 transitions, 1839 flow [2022-12-13 13:34:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 13:34:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 13:34:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2774 transitions. [2022-12-13 13:34:33,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40133101851851855 [2022-12-13 13:34:33,696 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2774 transitions. [2022-12-13 13:34:33,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2774 transitions. [2022-12-13 13:34:33,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:33,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2774 transitions. [2022-12-13 13:34:33,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.11111111111111) internal successors, (2774), 18 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:33,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 384.0) internal successors, (7296), 19 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:33,704 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 384.0) internal successors, (7296), 19 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:33,704 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 933 flow. Second operand 18 states and 2774 transitions. [2022-12-13 13:34:33,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 216 transitions, 1839 flow [2022-12-13 13:34:33,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 216 transitions, 1744 flow, removed 39 selfloop flow, removed 3 redundant places. [2022-12-13 13:34:33,735 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 1110 flow [2022-12-13 13:34:33,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1110, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2022-12-13 13:34:33,735 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2022-12-13 13:34:33,736 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 1110 flow [2022-12-13 13:34:33,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 147.4) internal successors, (2211), 15 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:33,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:33,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:33,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:34:33,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash 913037432, now seen corresponding path program 2 times [2022-12-13 13:34:33,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:33,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322570827] [2022-12-13 13:34:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:33,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:34,343 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 13:34:34,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:34,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322570827] [2022-12-13 13:34:34,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322570827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:34,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:34,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 13:34:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523532835] [2022-12-13 13:34:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:34,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:34:34,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:34:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:34:35,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 384 [2022-12-13 13:34:35,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 1110 flow. Second operand has 16 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:35,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:35,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 384 [2022-12-13 13:34:35,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:36,877 INFO L130 PetriNetUnfolder]: 2645/4936 cut-off events. [2022-12-13 13:34:36,877 INFO L131 PetriNetUnfolder]: For 9011/9011 co-relation queries the response was YES. [2022-12-13 13:34:36,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18117 conditions, 4936 events. 2645/4936 cut-off events. For 9011/9011 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 27458 event pairs, 826 based on Foata normal form. 6/4912 useless extension candidates. Maximal degree in co-relation 18071. Up to 3918 conditions per place. [2022-12-13 13:34:36,911 INFO L137 encePairwiseOnDemand]: 367/384 looper letters, 187 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2022-12-13 13:34:36,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 222 transitions, 1963 flow [2022-12-13 13:34:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:34:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:34:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2123 transitions. [2022-12-13 13:34:36,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39490327380952384 [2022-12-13 13:34:36,914 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2123 transitions. [2022-12-13 13:34:36,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2123 transitions. [2022-12-13 13:34:36,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:36,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2123 transitions. [2022-12-13 13:34:36,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 151.64285714285714) internal successors, (2123), 14 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:36,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 384.0) internal successors, (5760), 15 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:36,920 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 384.0) internal successors, (5760), 15 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:36,920 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 1110 flow. Second operand 14 states and 2123 transitions. [2022-12-13 13:34:36,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 222 transitions, 1963 flow [2022-12-13 13:34:36,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 222 transitions, 1940 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:36,953 INFO L231 Difference]: Finished difference. Result has 151 places, 145 transitions, 1316 flow [2022-12-13 13:34:36,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1316, PETRI_PLACES=151, PETRI_TRANSITIONS=145} [2022-12-13 13:34:36,954 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 103 predicate places. [2022-12-13 13:34:36,954 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 145 transitions, 1316 flow [2022-12-13 13:34:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:36,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:36,954 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:36,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:34:36,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1121267016, now seen corresponding path program 3 times [2022-12-13 13:34:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041023384] [2022-12-13 13:34:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:37,542 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 13:34:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041023384] [2022-12-13 13:34:37,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041023384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:37,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:37,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 13:34:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981849749] [2022-12-13 13:34:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:34:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:34:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:34:38,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 384 [2022-12-13 13:34:38,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 145 transitions, 1316 flow. Second operand has 16 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:38,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:38,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 384 [2022-12-13 13:34:38,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:39,887 INFO L130 PetriNetUnfolder]: 2751/5128 cut-off events. [2022-12-13 13:34:39,888 INFO L131 PetriNetUnfolder]: For 11223/11223 co-relation queries the response was YES. [2022-12-13 13:34:39,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19478 conditions, 5128 events. 2751/5128 cut-off events. For 11223/11223 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 28657 event pairs, 826 based on Foata normal form. 6/5100 useless extension candidates. Maximal degree in co-relation 19424. Up to 3769 conditions per place. [2022-12-13 13:34:39,910 INFO L137 encePairwiseOnDemand]: 368/384 looper letters, 184 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2022-12-13 13:34:39,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 230 transitions, 2161 flow [2022-12-13 13:34:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:34:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 13:34:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2265 transitions. [2022-12-13 13:34:39,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3932291666666667 [2022-12-13 13:34:39,914 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2265 transitions. [2022-12-13 13:34:39,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2265 transitions. [2022-12-13 13:34:39,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:39,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2265 transitions. [2022-12-13 13:34:39,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 151.0) internal successors, (2265), 15 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:39,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 384.0) internal successors, (6144), 16 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:39,923 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 384.0) internal successors, (6144), 16 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:39,923 INFO L175 Difference]: Start difference. First operand has 151 places, 145 transitions, 1316 flow. Second operand 15 states and 2265 transitions. [2022-12-13 13:34:39,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 230 transitions, 2161 flow [2022-12-13 13:34:39,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 230 transitions, 2108 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-12-13 13:34:39,980 INFO L231 Difference]: Finished difference. Result has 165 places, 154 transitions, 1500 flow [2022-12-13 13:34:39,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1500, PETRI_PLACES=165, PETRI_TRANSITIONS=154} [2022-12-13 13:34:39,980 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 117 predicate places. [2022-12-13 13:34:39,980 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 154 transitions, 1500 flow [2022-12-13 13:34:39,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:39,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:39,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:39,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:34:39,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1754377034, now seen corresponding path program 1 times [2022-12-13 13:34:39,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760876618] [2022-12-13 13:34:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:34:40,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760876618] [2022-12-13 13:34:40,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760876618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202990660] [2022-12-13 13:34:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:40,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:40,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:34:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:40,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:34:40,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:34:40,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:34:40,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202990660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:40,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:40,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 13:34:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295766846] [2022-12-13 13:34:40,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:40,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:34:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:40,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:34:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:34:40,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 384 [2022-12-13 13:34:40,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 154 transitions, 1500 flow. Second operand has 7 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:40,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:40,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 384 [2022-12-13 13:34:40,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:41,722 INFO L130 PetriNetUnfolder]: 5012/9647 cut-off events. [2022-12-13 13:34:41,722 INFO L131 PetriNetUnfolder]: For 24881/24881 co-relation queries the response was YES. [2022-12-13 13:34:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37549 conditions, 9647 events. 5012/9647 cut-off events. For 24881/24881 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 64802 event pairs, 1676 based on Foata normal form. 1370/10961 useless extension candidates. Maximal degree in co-relation 37489. Up to 2577 conditions per place. [2022-12-13 13:34:41,782 INFO L137 encePairwiseOnDemand]: 379/384 looper letters, 467 selfloop transitions, 16 changer transitions 0/483 dead transitions. [2022-12-13 13:34:41,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 483 transitions, 5539 flow [2022-12-13 13:34:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:34:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:34:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1183 transitions. [2022-12-13 13:34:41,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5134548611111112 [2022-12-13 13:34:41,785 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1183 transitions. [2022-12-13 13:34:41,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1183 transitions. [2022-12-13 13:34:41,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:41,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1183 transitions. [2022-12-13 13:34:41,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.16666666666666) internal successors, (1183), 6 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:41,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:41,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:41,789 INFO L175 Difference]: Start difference. First operand has 165 places, 154 transitions, 1500 flow. Second operand 6 states and 1183 transitions. [2022-12-13 13:34:41,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 483 transitions, 5539 flow [2022-12-13 13:34:41,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 483 transitions, 5432 flow, removed 37 selfloop flow, removed 3 redundant places. [2022-12-13 13:34:41,892 INFO L231 Difference]: Finished difference. Result has 171 places, 161 transitions, 1592 flow [2022-12-13 13:34:41,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1592, PETRI_PLACES=171, PETRI_TRANSITIONS=161} [2022-12-13 13:34:41,893 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 123 predicate places. [2022-12-13 13:34:41,893 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 161 transitions, 1592 flow [2022-12-13 13:34:41,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:41,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:41,893 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:41,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 13:34:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:42,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 154986420, now seen corresponding path program 1 times [2022-12-13 13:34:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:42,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950278801] [2022-12-13 13:34:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:42,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 13:34:42,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950278801] [2022-12-13 13:34:42,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950278801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:42,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:42,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:34:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224504283] [2022-12-13 13:34:42,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:42,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:42,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 384 [2022-12-13 13:34:42,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 161 transitions, 1592 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:42,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:42,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 384 [2022-12-13 13:34:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:43,422 INFO L130 PetriNetUnfolder]: 4100/8080 cut-off events. [2022-12-13 13:34:43,422 INFO L131 PetriNetUnfolder]: For 26264/26264 co-relation queries the response was YES. [2022-12-13 13:34:43,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33565 conditions, 8080 events. 4100/8080 cut-off events. For 26264/26264 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 52315 event pairs, 2348 based on Foata normal form. 300/8340 useless extension candidates. Maximal degree in co-relation 33501. Up to 5777 conditions per place. [2022-12-13 13:34:43,463 INFO L137 encePairwiseOnDemand]: 378/384 looper letters, 136 selfloop transitions, 17 changer transitions 0/153 dead transitions. [2022-12-13 13:34:43,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 153 transitions, 1716 flow [2022-12-13 13:34:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-12-13 13:34:43,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4982638888888889 [2022-12-13 13:34:43,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-12-13 13:34:43,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-12-13 13:34:43,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:43,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-12-13 13:34:43,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:43,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:43,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:43,466 INFO L175 Difference]: Start difference. First operand has 171 places, 161 transitions, 1592 flow. Second operand 3 states and 574 transitions. [2022-12-13 13:34:43,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 153 transitions, 1716 flow [2022-12-13 13:34:43,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 153 transitions, 1609 flow, removed 26 selfloop flow, removed 16 redundant places. [2022-12-13 13:34:43,525 INFO L231 Difference]: Finished difference. Result has 151 places, 131 transitions, 1258 flow [2022-12-13 13:34:43,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1258, PETRI_PLACES=151, PETRI_TRANSITIONS=131} [2022-12-13 13:34:43,525 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 103 predicate places. [2022-12-13 13:34:43,525 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 131 transitions, 1258 flow [2022-12-13 13:34:43,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:43,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:43,526 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:34:43,526 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:43,526 INFO L85 PathProgramCache]: Analyzing trace with hash 120741363, now seen corresponding path program 1 times [2022-12-13 13:34:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:43,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459049647] [2022-12-13 13:34:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:43,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459049647] [2022-12-13 13:34:43,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459049647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118035207] [2022-12-13 13:34:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:43,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:43,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:43,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:43,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:34:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 13:34:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:44,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:44,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:34:44,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-12-13 13:34:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:44,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118035207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:44,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:44,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2022-12-13 13:34:44,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878135580] [2022-12-13 13:34:44,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:44,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 13:34:44,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 13:34:44,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:34:46,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2022-12-13 13:34:46,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 131 transitions, 1258 flow. Second operand has 26 states, 26 states have (on average 153.6153846153846) internal successors, (3994), 26 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:46,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:46,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2022-12-13 13:34:46,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:49,647 INFO L130 PetriNetUnfolder]: 4403/8664 cut-off events. [2022-12-13 13:34:49,647 INFO L131 PetriNetUnfolder]: For 26092/26092 co-relation queries the response was YES. [2022-12-13 13:34:49,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34620 conditions, 8664 events. 4403/8664 cut-off events. For 26092/26092 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 57161 event pairs, 525 based on Foata normal form. 104/8718 useless extension candidates. Maximal degree in co-relation 34563. Up to 2052 conditions per place. [2022-12-13 13:34:49,688 INFO L137 encePairwiseOnDemand]: 369/384 looper letters, 233 selfloop transitions, 102 changer transitions 0/335 dead transitions. [2022-12-13 13:34:49,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 335 transitions, 3133 flow [2022-12-13 13:34:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 13:34:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 13:34:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4756 transitions. [2022-12-13 13:34:49,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4128472222222222 [2022-12-13 13:34:49,692 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4756 transitions. [2022-12-13 13:34:49,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4756 transitions. [2022-12-13 13:34:49,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:49,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4756 transitions. [2022-12-13 13:34:49,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 158.53333333333333) internal successors, (4756), 30 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:49,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 384.0) internal successors, (11904), 31 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:49,702 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 384.0) internal successors, (11904), 31 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:49,702 INFO L175 Difference]: Start difference. First operand has 151 places, 131 transitions, 1258 flow. Second operand 30 states and 4756 transitions. [2022-12-13 13:34:49,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 335 transitions, 3133 flow [2022-12-13 13:34:49,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 335 transitions, 3042 flow, removed 19 selfloop flow, removed 3 redundant places. [2022-12-13 13:34:49,768 INFO L231 Difference]: Finished difference. Result has 176 places, 167 transitions, 1692 flow [2022-12-13 13:34:49,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1692, PETRI_PLACES=176, PETRI_TRANSITIONS=167} [2022-12-13 13:34:49,768 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 128 predicate places. [2022-12-13 13:34:49,768 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 167 transitions, 1692 flow [2022-12-13 13:34:49,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 153.6153846153846) internal successors, (3994), 26 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:49,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:49,768 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:49,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:34:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:49,970 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash 34603804, now seen corresponding path program 1 times [2022-12-13 13:34:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:49,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644783681] [2022-12-13 13:34:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644783681] [2022-12-13 13:34:50,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644783681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189716210] [2022-12-13 13:34:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:50,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:50,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:50,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:34:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:50,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:34:50,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:34:50,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:50,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189716210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:50,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:34:50,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-13 13:34:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191588103] [2022-12-13 13:34:50,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:34:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:34:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:34:50,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 384 [2022-12-13 13:34:50,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 167 transitions, 1692 flow. Second operand has 6 states, 6 states have (on average 169.83333333333334) internal successors, (1019), 6 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:50,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:50,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 384 [2022-12-13 13:34:50,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:51,527 INFO L130 PetriNetUnfolder]: 4495/8886 cut-off events. [2022-12-13 13:34:51,527 INFO L131 PetriNetUnfolder]: For 26310/26310 co-relation queries the response was YES. [2022-12-13 13:34:51,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36381 conditions, 8886 events. 4495/8886 cut-off events. For 26310/26310 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 59285 event pairs, 1460 based on Foata normal form. 74/8924 useless extension candidates. Maximal degree in co-relation 36325. Up to 4628 conditions per place. [2022-12-13 13:34:51,573 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 198 selfloop transitions, 35 changer transitions 0/233 dead transitions. [2022-12-13 13:34:51,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 233 transitions, 2567 flow [2022-12-13 13:34:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:34:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:34:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1089 transitions. [2022-12-13 13:34:51,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47265625 [2022-12-13 13:34:51,575 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1089 transitions. [2022-12-13 13:34:51,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1089 transitions. [2022-12-13 13:34:51,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:51,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1089 transitions. [2022-12-13 13:34:51,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.5) internal successors, (1089), 6 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:51,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:51,578 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:51,578 INFO L175 Difference]: Start difference. First operand has 176 places, 167 transitions, 1692 flow. Second operand 6 states and 1089 transitions. [2022-12-13 13:34:51,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 233 transitions, 2567 flow [2022-12-13 13:34:51,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 2266 flow, removed 95 selfloop flow, removed 12 redundant places. [2022-12-13 13:34:51,659 INFO L231 Difference]: Finished difference. Result has 173 places, 170 transitions, 1609 flow [2022-12-13 13:34:51,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1609, PETRI_PLACES=173, PETRI_TRANSITIONS=170} [2022-12-13 13:34:51,659 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 125 predicate places. [2022-12-13 13:34:51,660 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 170 transitions, 1609 flow [2022-12-13 13:34:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.83333333333334) internal successors, (1019), 6 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:51,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:51,660 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-13 13:34:51,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:34:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:51,861 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1303677453, now seen corresponding path program 2 times [2022-12-13 13:34:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:51,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020993701] [2022-12-13 13:34:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:34:52,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020993701] [2022-12-13 13:34:52,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020993701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:34:52,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334504917] [2022-12-13 13:34:52,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:34:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:34:52,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:34:52,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:34:52,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:34:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:34:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 13:34:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:52,566 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:34:52,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 13:34:52,583 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 13:34:52,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 13:34:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:52,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:53,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334504917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:53,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:34:53,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 31 [2022-12-13 13:34:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203263887] [2022-12-13 13:34:53,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:53,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 13:34:53,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:34:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 13:34:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:34:56,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 384 [2022-12-13 13:34:56,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 170 transitions, 1609 flow. Second operand has 33 states, 33 states have (on average 161.45454545454547) internal successors, (5328), 33 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:56,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:56,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 384 [2022-12-13 13:34:56,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:59,130 INFO L130 PetriNetUnfolder]: 4779/9486 cut-off events. [2022-12-13 13:34:59,130 INFO L131 PetriNetUnfolder]: For 24882/24882 co-relation queries the response was YES. [2022-12-13 13:34:59,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37324 conditions, 9486 events. 4779/9486 cut-off events. For 24882/24882 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 60570 event pairs, 1433 based on Foata normal form. 90/9540 useless extension candidates. Maximal degree in co-relation 37267. Up to 6911 conditions per place. [2022-12-13 13:34:59,196 INFO L137 encePairwiseOnDemand]: 377/384 looper letters, 278 selfloop transitions, 23 changer transitions 0/301 dead transitions. [2022-12-13 13:34:59,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 301 transitions, 2961 flow [2022-12-13 13:34:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:34:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:34:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2403 transitions. [2022-12-13 13:34:59,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44698660714285715 [2022-12-13 13:34:59,199 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2403 transitions. [2022-12-13 13:34:59,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2403 transitions. [2022-12-13 13:34:59,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:59,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2403 transitions. [2022-12-13 13:34:59,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 171.64285714285714) internal successors, (2403), 14 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:59,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 384.0) internal successors, (5760), 15 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:59,205 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 384.0) internal successors, (5760), 15 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:59,206 INFO L175 Difference]: Start difference. First operand has 173 places, 170 transitions, 1609 flow. Second operand 14 states and 2403 transitions. [2022-12-13 13:34:59,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 301 transitions, 2961 flow [2022-12-13 13:34:59,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 301 transitions, 2947 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-12-13 13:34:59,291 INFO L231 Difference]: Finished difference. Result has 192 places, 178 transitions, 1750 flow [2022-12-13 13:34:59,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1750, PETRI_PLACES=192, PETRI_TRANSITIONS=178} [2022-12-13 13:34:59,291 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 144 predicate places. [2022-12-13 13:34:59,291 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 178 transitions, 1750 flow [2022-12-13 13:34:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 161.45454545454547) internal successors, (5328), 33 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:59,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:59,292 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:34:59,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:34:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:34:59,494 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:34:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1573074958, now seen corresponding path program 4 times [2022-12-13 13:34:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:34:59,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488038311] [2022-12-13 13:34:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:34:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:00,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:35:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488038311] [2022-12-13 13:35:00,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488038311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150301400] [2022-12-13 13:35:00,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:35:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:35:00,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:35:00,051 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:35:00,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:35:00,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:35:00,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:35:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 13:35:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:00,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:35:00,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 13:35:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:05,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:05,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-13 13:35:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:35:06,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150301400] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:06,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:35:06,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16, 15] total 44 [2022-12-13 13:35:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740852616] [2022-12-13 13:35:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:35:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:35:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:35:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1836, Unknown=2, NotChecked=0, Total=1980 [2022-12-13 13:35:07,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 384 [2022-12-13 13:35:07,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 178 transitions, 1750 flow. Second operand has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:07,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:07,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 384 [2022-12-13 13:35:07,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:11,267 INFO L130 PetriNetUnfolder]: 5899/11699 cut-off events. [2022-12-13 13:35:11,268 INFO L131 PetriNetUnfolder]: For 32800/32800 co-relation queries the response was YES. [2022-12-13 13:35:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47147 conditions, 11699 events. 5899/11699 cut-off events. For 32800/32800 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 79770 event pairs, 1033 based on Foata normal form. 42/11690 useless extension candidates. Maximal degree in co-relation 47083. Up to 3313 conditions per place. [2022-12-13 13:35:11,328 INFO L137 encePairwiseOnDemand]: 366/384 looper letters, 187 selfloop transitions, 185 changer transitions 0/372 dead transitions. [2022-12-13 13:35:11,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 372 transitions, 3822 flow [2022-12-13 13:35:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 13:35:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 13:35:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3919 transitions. [2022-12-13 13:35:11,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40822916666666664 [2022-12-13 13:35:11,334 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3919 transitions. [2022-12-13 13:35:11,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3919 transitions. [2022-12-13 13:35:11,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:11,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3919 transitions. [2022-12-13 13:35:11,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 156.76) internal successors, (3919), 25 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:11,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:11,349 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 384.0) internal successors, (9984), 26 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:11,349 INFO L175 Difference]: Start difference. First operand has 192 places, 178 transitions, 1750 flow. Second operand 25 states and 3919 transitions. [2022-12-13 13:35:11,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 372 transitions, 3822 flow [2022-12-13 13:35:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 372 transitions, 3744 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-12-13 13:35:11,453 INFO L231 Difference]: Finished difference. Result has 216 places, 259 transitions, 2961 flow [2022-12-13 13:35:11,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2961, PETRI_PLACES=216, PETRI_TRANSITIONS=259} [2022-12-13 13:35:11,453 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 168 predicate places. [2022-12-13 13:35:11,453 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 259 transitions, 2961 flow [2022-12-13 13:35:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:11,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:11,454 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:35:11,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:35:11,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 13:35:11,655 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:35:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1803158350, now seen corresponding path program 5 times [2022-12-13 13:35:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:35:11,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783527134] [2022-12-13 13:35:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:35:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:35:12,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783527134] [2022-12-13 13:35:12,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783527134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:35:12,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42777518] [2022-12-13 13:35:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:35:12,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:35:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:35:12,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:35:12,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:35:12,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:35:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:35:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 13:35:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:12,531 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 13:35:12,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 13:35:12,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:35:12,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 58 [2022-12-13 13:35:13,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-12-13 13:35:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:35:18,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:18,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42777518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:18,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:35:18,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 31 [2022-12-13 13:35:18,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564915256] [2022-12-13 13:35:18,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:18,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:35:18,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:35:18,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:35:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=978, Unknown=2, NotChecked=0, Total=1056 [2022-12-13 13:35:20,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:26,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:29,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:36,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:39,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:43,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:46,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:50,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:53,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:56,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:59,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:01,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:05,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:09,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:11,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:15,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:17,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:21,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:21,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 384 [2022-12-13 13:36:21,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 259 transitions, 2961 flow. Second operand has 16 states, 16 states have (on average 137.75) internal successors, (2204), 16 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:21,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:36:21,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 384 [2022-12-13 13:36:21,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:36:23,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:25,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:27,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:31,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:33,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:35,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:39,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:41,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:43,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:46,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:48,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:51,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:53,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:55,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:36:57,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:00,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:02,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:04,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:06,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:09,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:11,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:13,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:15,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:17,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:19,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:21,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:23,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:25,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:27,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:29,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:31,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:34,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:36,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:38,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:40,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:42,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:46,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:48,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:51,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:53,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:55,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:57,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:37:59,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:01,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:03,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:05,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:07,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:10,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:12,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:15,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:17,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:19,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:21,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:23,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:25,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:27,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:29,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:31,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:33,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:35,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:37,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:39,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:42,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:44,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:38:46,065 INFO L130 PetriNetUnfolder]: 5960/11822 cut-off events. [2022-12-13 13:38:46,065 INFO L131 PetriNetUnfolder]: For 41133/41133 co-relation queries the response was YES. [2022-12-13 13:38:46,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53466 conditions, 11822 events. 5960/11822 cut-off events. For 41133/41133 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 80847 event pairs, 883 based on Foata normal form. 6/11777 useless extension candidates. Maximal degree in co-relation 53395. Up to 4086 conditions per place. [2022-12-13 13:38:46,156 INFO L137 encePairwiseOnDemand]: 366/384 looper letters, 160 selfloop transitions, 226 changer transitions 0/386 dead transitions. [2022-12-13 13:38:46,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 386 transitions, 4479 flow [2022-12-13 13:38:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 13:38:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 13:38:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3838 transitions. [2022-12-13 13:38:46,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37017746913580246 [2022-12-13 13:38:46,162 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3838 transitions. [2022-12-13 13:38:46,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3838 transitions. [2022-12-13 13:38:46,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:38:46,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3838 transitions. [2022-12-13 13:38:46,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 142.14814814814815) internal successors, (3838), 27 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:46,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 384.0) internal successors, (10752), 28 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:46,178 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 384.0) internal successors, (10752), 28 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:46,179 INFO L175 Difference]: Start difference. First operand has 216 places, 259 transitions, 2961 flow. Second operand 27 states and 3838 transitions. [2022-12-13 13:38:46,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 386 transitions, 4479 flow [2022-12-13 13:38:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 386 transitions, 4386 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-12-13 13:38:46,376 INFO L231 Difference]: Finished difference. Result has 238 places, 281 transitions, 3612 flow [2022-12-13 13:38:46,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3612, PETRI_PLACES=238, PETRI_TRANSITIONS=281} [2022-12-13 13:38:46,376 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 190 predicate places. [2022-12-13 13:38:46,376 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 281 transitions, 3612 flow [2022-12-13 13:38:46,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 137.75) internal successors, (2204), 16 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:46,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:38:46,377 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:46,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:38:46,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 13:38:46,578 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:38:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1085379448, now seen corresponding path program 2 times [2022-12-13 13:38:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:46,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370696769] [2022-12-13 13:38:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:38:46,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370696769] [2022-12-13 13:38:46,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370696769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388070080] [2022-12-13 13:38:46,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:38:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:46,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:46,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:38:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:38:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:38:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:38:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:38:46,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:38:46,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388070080] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:46,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:46,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 13:38:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874674620] [2022-12-13 13:38:46,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:38:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:38:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:38:47,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 384 [2022-12-13 13:38:47,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 281 transitions, 3612 flow. Second operand has 16 states, 16 states have (on average 168.4375) internal successors, (2695), 16 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:47,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:38:47,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 384 [2022-12-13 13:38:47,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:38:49,533 INFO L130 PetriNetUnfolder]: 6485/12839 cut-off events. [2022-12-13 13:38:49,534 INFO L131 PetriNetUnfolder]: For 52533/52533 co-relation queries the response was YES. [2022-12-13 13:38:49,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61265 conditions, 12839 events. 6485/12839 cut-off events. For 52533/52533 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 89086 event pairs, 1889 based on Foata normal form. 60/12868 useless extension candidates. Maximal degree in co-relation 61193. Up to 2777 conditions per place. [2022-12-13 13:38:49,634 INFO L137 encePairwiseOnDemand]: 376/384 looper letters, 347 selfloop transitions, 141 changer transitions 0/488 dead transitions. [2022-12-13 13:38:49,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 488 transitions, 6264 flow [2022-12-13 13:38:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 13:38:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 13:38:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2964 transitions. [2022-12-13 13:38:49,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4540441176470588 [2022-12-13 13:38:49,639 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2964 transitions. [2022-12-13 13:38:49,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2964 transitions. [2022-12-13 13:38:49,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:38:49,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2964 transitions. [2022-12-13 13:38:49,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 174.35294117647058) internal successors, (2964), 17 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:49,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 384.0) internal successors, (6912), 18 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:49,651 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 384.0) internal successors, (6912), 18 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:49,651 INFO L175 Difference]: Start difference. First operand has 238 places, 281 transitions, 3612 flow. Second operand 17 states and 2964 transitions. [2022-12-13 13:38:49,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 488 transitions, 6264 flow [2022-12-13 13:38:49,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 488 transitions, 5935 flow, removed 46 selfloop flow, removed 10 redundant places. [2022-12-13 13:38:49,924 INFO L231 Difference]: Finished difference. Result has 247 places, 284 transitions, 3817 flow [2022-12-13 13:38:49,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3817, PETRI_PLACES=247, PETRI_TRANSITIONS=284} [2022-12-13 13:38:49,925 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 199 predicate places. [2022-12-13 13:38:49,925 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 284 transitions, 3817 flow [2022-12-13 13:38:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.4375) internal successors, (2695), 16 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:49,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:38:49,925 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:49,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:38:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 13:38:50,126 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:38:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1077946579, now seen corresponding path program 2 times [2022-12-13 13:38:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675343316] [2022-12-13 13:38:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:50,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675343316] [2022-12-13 13:38:50,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675343316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:50,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837438054] [2022-12-13 13:38:50,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:38:50,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:50,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:50,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:38:50,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:38:50,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:38:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 13:38:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:50,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:38:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:38:50,729 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 13:38:50,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-12-13 13:38:50,759 INFO L321 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2022-12-13 13:38:50,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 45 [2022-12-13 13:38:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:51,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:51,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837438054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:51,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:51,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 31 [2022-12-13 13:38:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072595596] [2022-12-13 13:38:51,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 13:38:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 13:38:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:38:55,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 384 [2022-12-13 13:38:55,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 284 transitions, 3817 flow. Second operand has 33 states, 33 states have (on average 153.8181818181818) internal successors, (5076), 33 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:55,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:38:55,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 384 [2022-12-13 13:38:55,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:39:00,087 INFO L130 PetriNetUnfolder]: 8567/16963 cut-off events. [2022-12-13 13:39:00,088 INFO L131 PetriNetUnfolder]: For 73010/73010 co-relation queries the response was YES. [2022-12-13 13:39:00,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81225 conditions, 16963 events. 8567/16963 cut-off events. For 73010/73010 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 125322 event pairs, 2153 based on Foata normal form. 106/17030 useless extension candidates. Maximal degree in co-relation 81151. Up to 7891 conditions per place. [2022-12-13 13:39:00,212 INFO L137 encePairwiseOnDemand]: 372/384 looper letters, 492 selfloop transitions, 114 changer transitions 0/606 dead transitions. [2022-12-13 13:39:00,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 606 transitions, 7816 flow [2022-12-13 13:39:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:39:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 13:39:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3721 transitions. [2022-12-13 13:39:00,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4213088768115942 [2022-12-13 13:39:00,216 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3721 transitions. [2022-12-13 13:39:00,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3721 transitions. [2022-12-13 13:39:00,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:39:00,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3721 transitions. [2022-12-13 13:39:00,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 161.7826086956522) internal successors, (3721), 23 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:00,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 384.0) internal successors, (9216), 24 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:00,225 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 384.0) internal successors, (9216), 24 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:00,225 INFO L175 Difference]: Start difference. First operand has 247 places, 284 transitions, 3817 flow. Second operand 23 states and 3721 transitions. [2022-12-13 13:39:00,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 606 transitions, 7816 flow [2022-12-13 13:39:00,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 606 transitions, 7671 flow, removed 28 selfloop flow, removed 6 redundant places. [2022-12-13 13:39:00,533 INFO L231 Difference]: Finished difference. Result has 273 places, 343 transitions, 5074 flow [2022-12-13 13:39:00,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5074, PETRI_PLACES=273, PETRI_TRANSITIONS=343} [2022-12-13 13:39:00,534 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 225 predicate places. [2022-12-13 13:39:00,534 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 343 transitions, 5074 flow [2022-12-13 13:39:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 153.8181818181818) internal successors, (5076), 33 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:00,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:39:00,535 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:39:00,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 13:39:00,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 13:39:00,736 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:39:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:39:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 789406617, now seen corresponding path program 2 times [2022-12-13 13:39:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:39:00,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665951819] [2022-12-13 13:39:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:39:00,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:39:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:39:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 13:39:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:39:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665951819] [2022-12-13 13:39:00,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665951819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:39:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188345484] [2022-12-13 13:39:00,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:39:00,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:39:00,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:39:00,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:39:00,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:39:00,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:39:00,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:39:00,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:39:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:39:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-13 13:39:01,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:39:01,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188345484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:39:01,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:39:01,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-12-13 13:39:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208071662] [2022-12-13 13:39:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:39:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:39:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:39:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:39:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:39:01,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 384 [2022-12-13 13:39:01,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 343 transitions, 5074 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:01,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:39:01,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 384 [2022-12-13 13:39:01,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:39:04,349 INFO L130 PetriNetUnfolder]: 8567/16909 cut-off events. [2022-12-13 13:39:04,349 INFO L131 PetriNetUnfolder]: For 83665/83665 co-relation queries the response was YES. [2022-12-13 13:39:04,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83649 conditions, 16909 events. 8567/16909 cut-off events. For 83665/83665 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 125249 event pairs, 7020 based on Foata normal form. 54/16924 useless extension candidates. Maximal degree in co-relation 83567. Up to 16909 conditions per place. [2022-12-13 13:39:04,505 INFO L137 encePairwiseOnDemand]: 382/384 looper letters, 336 selfloop transitions, 1 changer transitions 1/338 dead transitions. [2022-12-13 13:39:04,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 338 transitions, 5713 flow [2022-12-13 13:39:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:39:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:39:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2022-12-13 13:39:04,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4800347222222222 [2022-12-13 13:39:04,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2022-12-13 13:39:04,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2022-12-13 13:39:04,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:39:04,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2022-12-13 13:39:04,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:04,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:04,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:04,509 INFO L175 Difference]: Start difference. First operand has 273 places, 343 transitions, 5074 flow. Second operand 3 states and 553 transitions. [2022-12-13 13:39:04,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 338 transitions, 5713 flow [2022-12-13 13:39:05,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 338 transitions, 5609 flow, removed 28 selfloop flow, removed 8 redundant places. [2022-12-13 13:39:05,060 INFO L231 Difference]: Finished difference. Result has 262 places, 337 transitions, 4932 flow [2022-12-13 13:39:05,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=4933, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4932, PETRI_PLACES=262, PETRI_TRANSITIONS=337} [2022-12-13 13:39:05,061 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 214 predicate places. [2022-12-13 13:39:05,061 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 337 transitions, 4932 flow [2022-12-13 13:39:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:05,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:39:05,062 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:39:05,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 13:39:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 13:39:05,263 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:39:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:39:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -617164237, now seen corresponding path program 1 times [2022-12-13 13:39:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:39:05,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592959514] [2022-12-13 13:39:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:39:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:39:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:39:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:39:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:39:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592959514] [2022-12-13 13:39:06,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592959514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:39:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504086620] [2022-12-13 13:39:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:39:06,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:39:06,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:39:06,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:39:06,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 13:39:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:39:06,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 13:39:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:39:06,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:39:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:39:06,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-12-13 13:39:07,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-12-13 13:39:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:39:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:39:12,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-13 13:39:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:39:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504086620] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:39:12,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:39:12,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 56 [2022-12-13 13:39:12,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709207303] [2022-12-13 13:39:12,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:39:12,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 13:39:12,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:39:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 13:39:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3016, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 13:39:28,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 384 [2022-12-13 13:39:28,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 337 transitions, 4932 flow. Second operand has 57 states, 57 states have (on average 143.89473684210526) internal successors, (8202), 57 states have internal predecessors, (8202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:28,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:39:28,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 384 [2022-12-13 13:39:28,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:40:17,660 INFO L130 PetriNetUnfolder]: 15714/30889 cut-off events. [2022-12-13 13:40:17,660 INFO L131 PetriNetUnfolder]: For 139172/139172 co-relation queries the response was YES. [2022-12-13 13:40:17,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150608 conditions, 30889 events. 15714/30889 cut-off events. For 139172/139172 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 252368 event pairs, 2321 based on Foata normal form. 146/30981 useless extension candidates. Maximal degree in co-relation 150526. Up to 5963 conditions per place. [2022-12-13 13:40:17,922 INFO L137 encePairwiseOnDemand]: 365/384 looper letters, 467 selfloop transitions, 570 changer transitions 59/1096 dead transitions. [2022-12-13 13:40:17,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1096 transitions, 14286 flow [2022-12-13 13:40:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-13 13:40:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-12-13 13:40:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 14475 transitions. [2022-12-13 13:40:17,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3846460459183674 [2022-12-13 13:40:17,934 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 14475 transitions. [2022-12-13 13:40:17,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 14475 transitions. [2022-12-13 13:40:17,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:40:17,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 14475 transitions. [2022-12-13 13:40:17,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 147.70408163265307) internal successors, (14475), 98 states have internal predecessors, (14475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:17,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 384.0) internal successors, (38016), 99 states have internal predecessors, (38016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:17,968 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 384.0) internal successors, (38016), 99 states have internal predecessors, (38016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:17,968 INFO L175 Difference]: Start difference. First operand has 262 places, 337 transitions, 4932 flow. Second operand 98 states and 14475 transitions. [2022-12-13 13:40:17,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1096 transitions, 14286 flow [2022-12-13 13:40:18,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1096 transitions, 14285 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:40:18,685 INFO L231 Difference]: Finished difference. Result has 366 places, 664 transitions, 11092 flow [2022-12-13 13:40:18,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=11092, PETRI_PLACES=366, PETRI_TRANSITIONS=664} [2022-12-13 13:40:18,686 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 318 predicate places. [2022-12-13 13:40:18,686 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 664 transitions, 11092 flow [2022-12-13 13:40:18,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 143.89473684210526) internal successors, (8202), 57 states have internal predecessors, (8202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:18,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:40:18,687 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:40:18,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 13:40:18,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:40:18,888 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:40:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:40:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1297508117, now seen corresponding path program 2 times [2022-12-13 13:40:18,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:40:18,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703407058] [2022-12-13 13:40:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:40:18,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:40:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:40:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:40:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:40:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703407058] [2022-12-13 13:40:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703407058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:40:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841184220] [2022-12-13 13:40:20,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:40:20,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:40:20,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:40:20,098 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:40:20,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 13:40:20,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:40:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:40:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 13:40:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:40:20,290 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:40:20,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 13:40:20,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:40:20,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-12-13 13:40:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:40:21,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 45 [2022-12-13 13:40:22,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:40:22,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 49 [2022-12-13 13:40:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:40:23,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:40:24,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:40:24,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 13:40:24,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:40:24,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-13 13:40:24,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-13 13:40:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:40:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841184220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:40:25,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:40:25,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 59 [2022-12-13 13:40:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11719238] [2022-12-13 13:40:25,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:40:25,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 13:40:25,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:40:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 13:40:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3457, Unknown=9, NotChecked=0, Total=3660 [2022-12-13 13:40:43,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 384 [2022-12-13 13:40:43,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 664 transitions, 11092 flow. Second operand has 61 states, 61 states have (on average 106.77049180327869) internal successors, (6513), 61 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:43,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:40:43,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 384 [2022-12-13 13:40:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:41:01,217 INFO L130 PetriNetUnfolder]: 16424/32309 cut-off events. [2022-12-13 13:41:01,217 INFO L131 PetriNetUnfolder]: For 169243/169243 co-relation queries the response was YES. [2022-12-13 13:41:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171877 conditions, 32309 events. 16424/32309 cut-off events. For 169243/169243 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 264832 event pairs, 7785 based on Foata normal form. 102/32357 useless extension candidates. Maximal degree in co-relation 171786. Up to 28146 conditions per place. [2022-12-13 13:41:01,593 INFO L137 encePairwiseOnDemand]: 367/384 looper letters, 732 selfloop transitions, 88 changer transitions 41/861 dead transitions. [2022-12-13 13:41:01,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 861 transitions, 14476 flow [2022-12-13 13:41:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:41:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 13:41:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2602 transitions. [2022-12-13 13:41:01,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29461050724637683 [2022-12-13 13:41:01,599 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2602 transitions. [2022-12-13 13:41:01,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2602 transitions. [2022-12-13 13:41:01,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:41:01,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2602 transitions. [2022-12-13 13:41:01,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 113.1304347826087) internal successors, (2602), 23 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:01,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 384.0) internal successors, (9216), 24 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:01,612 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 384.0) internal successors, (9216), 24 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:01,612 INFO L175 Difference]: Start difference. First operand has 366 places, 664 transitions, 11092 flow. Second operand 23 states and 2602 transitions. [2022-12-13 13:41:01,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 861 transitions, 14476 flow [2022-12-13 13:41:02,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 861 transitions, 13452 flow, removed 205 selfloop flow, removed 20 redundant places. [2022-12-13 13:41:02,999 INFO L231 Difference]: Finished difference. Result has 381 places, 708 transitions, 11174 flow [2022-12-13 13:41:02,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=10165, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11174, PETRI_PLACES=381, PETRI_TRANSITIONS=708} [2022-12-13 13:41:02,999 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 333 predicate places. [2022-12-13 13:41:03,000 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 708 transitions, 11174 flow [2022-12-13 13:41:03,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 106.77049180327869) internal successors, (6513), 61 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:03,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:41:03,000 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:41:03,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 13:41:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:41:03,201 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:41:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:41:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1908128151, now seen corresponding path program 3 times [2022-12-13 13:41:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:41:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197998664] [2022-12-13 13:41:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:41:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:41:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:41:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:41:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:41:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197998664] [2022-12-13 13:41:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197998664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:41:04,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816813845] [2022-12-13 13:41:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:41:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:41:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:41:04,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:41:04,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 13:41:04,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 13:41:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:41:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 13:41:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:41:04,438 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 13:41:04,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-12-13 13:41:04,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:41:05,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-12-13 13:41:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:41:05,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-12-13 13:41:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:41:06,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 46 [2022-12-13 13:41:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:41:10,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:41:20,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:41:20,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-12-13 13:41:20,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:41:20,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2022-12-13 13:41:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:41:20,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-12-13 13:41:20,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-12-13 13:41:20,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:41:20,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:41:20,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-12-13 13:41:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:41:20,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816813845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:41:20,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:41:20,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 61 [2022-12-13 13:41:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518477556] [2022-12-13 13:41:20,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:41:20,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 13:41:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:41:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 13:41:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3560, Unknown=22, NotChecked=0, Total=3906 [2022-12-13 13:41:23,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:26,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:28,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:30,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:32,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:34,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:36,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:38,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:40,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:43,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:46,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:48,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:50,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:52,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:57,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:41:59,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:00,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 384 [2022-12-13 13:42:00,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 708 transitions, 11174 flow. Second operand has 63 states, 63 states have (on average 106.71428571428571) internal successors, (6723), 63 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:42:00,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:42:00,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 384 [2022-12-13 13:42:00,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:42:20,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:25,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:32,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:34,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:44,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:49,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:51,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:42:56,342 INFO L130 PetriNetUnfolder]: 21334/41799 cut-off events. [2022-12-13 13:42:56,342 INFO L131 PetriNetUnfolder]: For 195458/195458 co-relation queries the response was YES. [2022-12-13 13:42:56,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212595 conditions, 41799 events. 21334/41799 cut-off events. For 195458/195458 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 352194 event pairs, 6553 based on Foata normal form. 42/41781 useless extension candidates. Maximal degree in co-relation 212492. Up to 20517 conditions per place. [2022-12-13 13:42:56,863 INFO L137 encePairwiseOnDemand]: 367/384 looper letters, 844 selfloop transitions, 459 changer transitions 80/1383 dead transitions. [2022-12-13 13:42:56,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1383 transitions, 21259 flow [2022-12-13 13:42:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 13:42:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 13:42:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 6031 transitions. [2022-12-13 13:42:56,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29084683641975306 [2022-12-13 13:42:56,870 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 6031 transitions. [2022-12-13 13:42:56,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 6031 transitions. [2022-12-13 13:42:56,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:42:56,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 6031 transitions. [2022-12-13 13:42:56,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 111.68518518518519) internal successors, (6031), 54 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:42:56,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 384.0) internal successors, (21120), 55 states have internal predecessors, (21120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:42:56,888 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 384.0) internal successors, (21120), 55 states have internal predecessors, (21120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:42:56,888 INFO L175 Difference]: Start difference. First operand has 381 places, 708 transitions, 11174 flow. Second operand 54 states and 6031 transitions. [2022-12-13 13:42:56,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1383 transitions, 21259 flow [2022-12-13 13:42:58,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1383 transitions, 21136 flow, removed 33 selfloop flow, removed 10 redundant places. [2022-12-13 13:42:58,766 INFO L231 Difference]: Finished difference. Result has 447 places, 991 transitions, 17121 flow [2022-12-13 13:42:58,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=11081, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=17121, PETRI_PLACES=447, PETRI_TRANSITIONS=991} [2022-12-13 13:42:58,766 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 399 predicate places. [2022-12-13 13:42:58,766 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 991 transitions, 17121 flow [2022-12-13 13:42:58,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 106.71428571428571) internal successors, (6723), 63 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:42:58,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:42:58,767 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:42:58,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 13:42:58,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:42:58,968 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:42:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:42:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1618563973, now seen corresponding path program 4 times [2022-12-13 13:42:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:42:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314372109] [2022-12-13 13:42:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:42:58,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:42:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314372109] [2022-12-13 13:43:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314372109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:43:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231192745] [2022-12-13 13:43:00,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:43:00,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:00,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:00,407 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:00,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 13:43:00,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:43:00,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-13 13:43:00,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:00,521 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-13 13:43:00,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 13:43:00,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:43:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:43:01,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-12-13 13:43:01,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-12-13 13:43:02,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 13:43:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:03,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:43:04,480 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1093 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1093) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset| (- 4))) 4294967296)))) is different from false [2022-12-13 13:43:04,488 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1093 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1093) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))) is different from false [2022-12-13 13:43:07,478 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2022-12-13 13:43:07,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 62 [2022-12-13 13:43:07,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:43:07,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2022-12-13 13:43:07,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-13 13:43:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 13:43:07,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231192745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:43:07,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:43:07,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 67 [2022-12-13 13:43:07,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978130879] [2022-12-13 13:43:07,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:43:07,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 13:43:07,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:43:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 13:43:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4123, Unknown=43, NotChecked=262, Total=4692 [2022-12-13 13:43:08,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 384 [2022-12-13 13:43:08,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 991 transitions, 17121 flow. Second operand has 69 states, 69 states have (on average 106.56521739130434) internal successors, (7353), 69 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:08,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:43:08,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 384 [2022-12-13 13:43:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:43:12,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:15,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:18,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:22,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:24,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:27,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:29,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:32,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:43:34,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:43:36,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:38,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:41,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:43:43,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:43:47,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:43:50,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:52,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:55,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:43:57,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:43:59,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:44:03,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:05,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:07,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:10,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:15,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:20,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:22,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:24,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:25,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:29,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:31,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:35,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:39,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:41,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:44:45,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:44:47,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:44:52,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:44:54,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:44:57,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:44:59,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:01,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:04,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:06,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:08,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:10,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:13,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:16,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:18,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:20,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:22,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:24,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:27,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:30,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:32,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:34,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:36,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:39,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:41,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:45,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:47,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:49,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:45:54,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:56,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:45:59,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:02,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:46:06,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:08,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:11,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:15,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:20,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:46:23,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:26,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:28,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:30,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:46:33,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:46:37,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:46:40,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:46:49,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:46:57,199 INFO L130 PetriNetUnfolder]: 24309/48739 cut-off events. [2022-12-13 13:46:57,199 INFO L131 PetriNetUnfolder]: For 285672/285672 co-relation queries the response was YES. [2022-12-13 13:46:57,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259052 conditions, 48739 events. 24309/48739 cut-off events. For 285672/285672 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 428790 event pairs, 3030 based on Foata normal form. 522/49176 useless extension candidates. Maximal degree in co-relation 258927. Up to 9024 conditions per place. [2022-12-13 13:46:57,952 INFO L137 encePairwiseOnDemand]: 361/384 looper letters, 466 selfloop transitions, 1261 changer transitions 69/1796 dead transitions. [2022-12-13 13:46:57,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 1796 transitions, 28166 flow [2022-12-13 13:46:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-13 13:46:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-12-13 13:46:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 11825 transitions. [2022-12-13 13:46:57,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28779692367601245 [2022-12-13 13:46:57,963 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 11825 transitions. [2022-12-13 13:46:57,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 11825 transitions. [2022-12-13 13:46:57,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:46:57,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 11825 transitions. [2022-12-13 13:46:57,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 110.51401869158879) internal successors, (11825), 107 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:46:57,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 384.0) internal successors, (41472), 108 states have internal predecessors, (41472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:46:57,997 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 384.0) internal successors, (41472), 108 states have internal predecessors, (41472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:46:57,997 INFO L175 Difference]: Start difference. First operand has 447 places, 991 transitions, 17121 flow. Second operand 107 states and 11825 transitions. [2022-12-13 13:46:57,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 1796 transitions, 28166 flow [2022-12-13 13:47:01,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1796 transitions, 27490 flow, removed 203 selfloop flow, removed 19 redundant places. [2022-12-13 13:47:01,749 INFO L231 Difference]: Finished difference. Result has 541 places, 1376 transitions, 25136 flow [2022-12-13 13:47:01,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=13558, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=25136, PETRI_PLACES=541, PETRI_TRANSITIONS=1376} [2022-12-13 13:47:01,750 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 493 predicate places. [2022-12-13 13:47:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1376 transitions, 25136 flow [2022-12-13 13:47:01,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 106.56521739130434) internal successors, (7353), 69 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:47:01,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:47:01,751 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2022-12-13 13:47:01,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 13:47:01,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 13:47:01,953 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:47:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1959767757, now seen corresponding path program 3 times [2022-12-13 13:47:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:01,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022850057] [2022-12-13 13:47:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:01,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:47:02,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022850057] [2022-12-13 13:47:02,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022850057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142337289] [2022-12-13 13:47:02,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:47:02,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:02,081 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:02,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 13:47:02,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:47:02,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:02,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 13:47:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:47:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:47:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:47:02,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 13:47:02,245 INFO L321 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2022-12-13 13:47:02,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 33 [2022-12-13 13:47:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 13:47:03,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 13:47:04,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142337289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:04,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:04,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 13:47:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419659254] [2022-12-13 13:47:04,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:04,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 13:47:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 13:47:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:47:08,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 384 [2022-12-13 13:47:08,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1376 transitions, 25136 flow. Second operand has 24 states, 24 states have (on average 156.375) internal successors, (3753), 24 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:47:08,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:47:08,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 384 [2022-12-13 13:47:08,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:47:30,946 INFO L130 PetriNetUnfolder]: 23580/45946 cut-off events. [2022-12-13 13:47:30,946 INFO L131 PetriNetUnfolder]: For 617440/617440 co-relation queries the response was YES. [2022-12-13 13:47:31,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333487 conditions, 45946 events. 23580/45946 cut-off events. For 617440/617440 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 387721 event pairs, 2259 based on Foata normal form. 1389/47306 useless extension candidates. Maximal degree in co-relation 333344. Up to 14703 conditions per place. [2022-12-13 13:47:31,799 INFO L137 encePairwiseOnDemand]: 371/384 looper letters, 799 selfloop transitions, 527 changer transitions 981/2307 dead transitions. [2022-12-13 13:47:31,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 2307 transitions, 46437 flow [2022-12-13 13:47:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 13:47:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 13:47:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6739 transitions. [2022-12-13 13:47:31,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41784474206349204 [2022-12-13 13:47:31,808 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6739 transitions. [2022-12-13 13:47:31,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6739 transitions. [2022-12-13 13:47:31,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:47:31,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6739 transitions. [2022-12-13 13:47:31,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 160.45238095238096) internal successors, (6739), 42 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:47:31,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 384.0) internal successors, (16512), 43 states have internal predecessors, (16512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:47:31,828 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 384.0) internal successors, (16512), 43 states have internal predecessors, (16512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:47:31,828 INFO L175 Difference]: Start difference. First operand has 541 places, 1376 transitions, 25136 flow. Second operand 42 states and 6739 transitions. [2022-12-13 13:47:31,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 2307 transitions, 46437 flow [2022-12-13 13:47:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2307 transitions, 41967 flow, removed 894 selfloop flow, removed 52 redundant places. [2022-12-13 13:47:37,393 INFO L231 Difference]: Finished difference. Result has 525 places, 928 transitions, 15530 flow [2022-12-13 13:47:37,394 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=17959, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15530, PETRI_PLACES=525, PETRI_TRANSITIONS=928} [2022-12-13 13:47:37,394 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 477 predicate places. [2022-12-13 13:47:37,394 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 928 transitions, 15530 flow [2022-12-13 13:47:37,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 156.375) internal successors, (3753), 24 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:47:37,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:47:37,394 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:37,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 13:47:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 13:47:37,595 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-13 13:47:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash 71660775, now seen corresponding path program 5 times [2022-12-13 13:47:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:37,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624254443] [2022-12-13 13:47:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:47:39,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624254443] [2022-12-13 13:47:39,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624254443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626099636] [2022-12-13 13:47:39,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:47:39,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:39,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:39,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:39,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3694130a-1e3d-48d4-85c5-7a8c0f07b98b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 13:47:39,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 13:47:39,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 13:47:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:39,438 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:47:39,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 13:47:39,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-13 13:47:40,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2022-12-13 13:47:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:47:40,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 40 [2022-12-13 13:47:42,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-12-13 13:47:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:47:46,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:48,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:47:48,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 13:47:48,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:47:48,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-13 13:47:48,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-13 13:47:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:47:48,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626099636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:48,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:48,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 19] total 65 [2022-12-13 13:47:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643513283] [2022-12-13 13:47:48,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:48,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 13:47:48,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 13:47:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4177, Unknown=21, NotChecked=0, Total=4422 [2022-12-13 13:48:09,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 384 [2022-12-13 13:48:09,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 928 transitions, 15530 flow. Second operand has 67 states, 67 states have (on average 106.92537313432835) internal successors, (7164), 67 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:48:09,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:48:09,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 384 [2022-12-13 13:48:09,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:48:20,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]