./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/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_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/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_0ec7410e-a8d8-4c96-9044-a97409aca8ae/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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- 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 13:13:50,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:13:50,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:13:50,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:13:50,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:13:50,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:13:50,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:13:50,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:13:50,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:13:50,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:13:50,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:13:50,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:13:50,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:13:50,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:13:50,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:13:50,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:13:50,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:13:50,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:13:50,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:13:50,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:13:50,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:13:50,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:13:50,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:13:50,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:13:50,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:13:50,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:13:50,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:13:50,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:13:50,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:13:50,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:13:50,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:13:50,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:13:50,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:13:50,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:13:50,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:13:50,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:13:50,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:13:50,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:13:50,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:13:50,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:13:50,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:13:50,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:13:50,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:13:50,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:13:50,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:13:50,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:13:50,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:13:50,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:13:50,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:13:50,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:13:50,135 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:13:50,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:13:50,136 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:13:50,136 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:13:50,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:13:50,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:13:50,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:13:50,137 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:13:50,137 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:13:50,137 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:13:50,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:13:50,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:13:50,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:13:50,138 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:13:50,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:13:50,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:13:50,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:13:50,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:13:50,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:13:50,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:13:50,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:13:50,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:13:50,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:13:50,140 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:13:50,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:13:50,140 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:13:50,140 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_0ec7410e-a8d8-4c96-9044-a97409aca8ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2022-12-13 13:13:50,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:13:50,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:13:50,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:13:50,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:13:50,336 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:13:50,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-12-13 13:13:52,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:13:52,971 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:13:52,971 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-12-13 13:13:52,981 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/data/3847005e9/d5d0e5ad64aa43a5a2b403a4a8506c80/FLAG1b5d37bfb [2022-12-13 13:13:53,327 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/data/3847005e9/d5d0e5ad64aa43a5a2b403a4a8506c80 [2022-12-13 13:13:53,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:13:53,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:13:53,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:13:53,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:13:53,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:13:53,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26ea3fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53, skipping insertion in model container [2022-12-13 13:13:53,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:13:53,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:13:53,662 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_0ec7410e-a8d8-4c96-9044-a97409aca8ae/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-12-13 13:13:53,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:13:53,692 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:13:53,716 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_0ec7410e-a8d8-4c96-9044-a97409aca8ae/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-12-13 13:13:53,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:13:53,755 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:13:53,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53 WrapperNode [2022-12-13 13:13:53,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:13:53,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:13:53,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:13:53,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:13:53,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,790 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-12-13 13:13:53,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:13:53,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:13:53,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:13:53,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:13:53,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:13:53,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:13:53,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:13:53,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:13:53,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (1/1) ... [2022-12-13 13:13:53,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:13:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:53,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:13:53,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:13:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 13:13:53,874 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 13:13:53,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:13:53,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:13:53,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:13:53,875 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 13:13:53,975 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:13:53,977 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:13:54,250 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:13:54,259 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:13:54,259 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 13:13:54,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:13:54 BoogieIcfgContainer [2022-12-13 13:13:54,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:13:54,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:13:54,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:13:54,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:13:54,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:13:53" (1/3) ... [2022-12-13 13:13:54,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db1cc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:13:54, skipping insertion in model container [2022-12-13 13:13:54,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:13:53" (2/3) ... [2022-12-13 13:13:54,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db1cc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:13:54, skipping insertion in model container [2022-12-13 13:13:54,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:13:54" (3/3) ... [2022-12-13 13:13:54,268 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2022-12-13 13:13:54,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:13:54,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-12-13 13:13:54,282 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:13:54,357 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 13:13:54,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-12-13 13:13:54,454 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-12-13 13:13:54,454 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 13:13:54,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1213 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-12-13 13:13:54,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 225 transitions, 458 flow [2022-12-13 13:13:54,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 225 transitions, 458 flow [2022-12-13 13:13:54,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:13:54,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 225 transitions, 458 flow [2022-12-13 13:13:54,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 225 transitions, 458 flow [2022-12-13 13:13:54,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-12-13 13:13:54,517 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-12-13 13:13:54,518 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 13:13:54,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1213 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-12-13 13:13:54,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 15200 [2022-12-13 13:13:57,628 INFO L134 LiptonReduction]: Checked pairs total: 29883 [2022-12-13 13:13:57,629 INFO L136 LiptonReduction]: Total number of compositions: 209 [2022-12-13 13:13:57,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:13:57,643 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;@119e718a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:13:57,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 13:13:57,645 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 13:13:57,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:13:57,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:57,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:13:57,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:13:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash 885417, now seen corresponding path program 1 times [2022-12-13 13:13:57,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544162532] [2022-12-13 13:13:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:57,827 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 13:13:57,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:57,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544162532] [2022-12-13 13:13:57,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544162532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:57,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:57,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:13:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600263415] [2022-12-13 13:13:57,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:57,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:57,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 434 [2022-12-13 13:13:57,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:57,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 434 [2022-12-13 13:13:57,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:58,110 INFO L130 PetriNetUnfolder]: 601/1386 cut-off events. [2022-12-13 13:13:58,111 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:13:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 1386 events. 601/1386 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8901 event pairs, 551 based on Foata normal form. 102/1059 useless extension candidates. Maximal degree in co-relation 2495. Up to 1185 conditions per place. [2022-12-13 13:13:58,119 INFO L137 encePairwiseOnDemand]: 404/434 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-12-13 13:13:58,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 252 flow [2022-12-13 13:13:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-12-13 13:13:58,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5015360983102919 [2022-12-13 13:13:58,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-12-13 13:13:58,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-12-13 13:13:58,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:58,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-12-13 13:13:58,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,147 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 653 transitions. [2022-12-13 13:13:58,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 252 flow [2022-12-13 13:13:58,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:13:58,152 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2022-12-13 13:13:58,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-12-13 13:13:58,157 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-12-13 13:13:58,158 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2022-12-13 13:13:58,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:58,158 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:13:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:13:58,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:13:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 27437849, now seen corresponding path program 1 times [2022-12-13 13:13:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036434440] [2022-12-13 13:13:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:13:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:58,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036434440] [2022-12-13 13:13:58,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036434440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:13:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091144935] [2022-12-13 13:13:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:58,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:58,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:58,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:13:58,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:13:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:13:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:13:58,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:13:58,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091144935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:58,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:13:58,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:13:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266158205] [2022-12-13 13:13:58,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:58,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:13:58,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:13:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:13:58,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 434 [2022-12-13 13:13:58,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:58,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 434 [2022-12-13 13:13:58,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:58,577 INFO L130 PetriNetUnfolder]: 601/1389 cut-off events. [2022-12-13 13:13:58,577 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:13:58,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 1389 events. 601/1389 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8903 event pairs, 551 based on Foata normal form. 0/960 useless extension candidates. Maximal degree in co-relation 2583. Up to 1185 conditions per place. [2022-12-13 13:13:58,583 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 13:13:58,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 280 flow [2022-12-13 13:13:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:13:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:13:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2022-12-13 13:13:58,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4589093701996928 [2022-12-13 13:13:58,586 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2022-12-13 13:13:58,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2022-12-13 13:13:58,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:58,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2022-12-13 13:13:58,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,592 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,592 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1195 transitions. [2022-12-13 13:13:58,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 280 flow [2022-12-13 13:13:58,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 276 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:58,594 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2022-12-13 13:13:58,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2022-12-13 13:13:58,595 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-13 13:13:58,595 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2022-12-13 13:13:58,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:58,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:58,596 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 13:13:58,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:13:58,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:58,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:13:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:58,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1347104299, now seen corresponding path program 2 times [2022-12-13 13:13:58,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964135914] [2022-12-13 13:13:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:58,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:13:58,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:58,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964135914] [2022-12-13 13:13:58,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964135914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:13:58,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800731488] [2022-12-13 13:13:58,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:13:58,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:58,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:58,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:13:58,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:13:58,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:13:58,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:13:58,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:13:58,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:59,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:13:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:13:59,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:59,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800731488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:59,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:13:59,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 13:13:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805857553] [2022-12-13 13:13:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:59,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:13:59,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 434 [2022-12-13 13:13:59,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:59,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 434 [2022-12-13 13:13:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:59,269 INFO L130 PetriNetUnfolder]: 573/1274 cut-off events. [2022-12-13 13:13:59,269 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:13:59,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 1274 events. 573/1274 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8112 event pairs, 0 based on Foata normal form. 0/859 useless extension candidates. Maximal degree in co-relation 2456. Up to 1145 conditions per place. [2022-12-13 13:13:59,275 INFO L137 encePairwiseOnDemand]: 430/434 looper letters, 77 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2022-12-13 13:13:59,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 384 flow [2022-12-13 13:13:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2022-12-13 13:13:59,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2022-12-13 13:13:59,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2022-12-13 13:13:59,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2022-12-13 13:13:59,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:59,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2022-12-13 13:13:59,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,284 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 644 transitions. [2022-12-13 13:13:59,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 384 flow [2022-12-13 13:13:59,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 370 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:13:59,287 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 180 flow [2022-12-13 13:13:59,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-12-13 13:13:59,288 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-12-13 13:13:59,288 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 180 flow [2022-12-13 13:13:59,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:59,289 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 13:13:59,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:13:59,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 13:13:59,490 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:13:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1347104297, now seen corresponding path program 1 times [2022-12-13 13:13:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485095694] [2022-12-13 13:13:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:13:59,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:59,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485095694] [2022-12-13 13:13:59,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485095694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:59,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:59,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:13:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621819014] [2022-12-13 13:13:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:59,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:13:59,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:13:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:13:59,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 434 [2022-12-13 13:13:59,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:59,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 434 [2022-12-13 13:13:59,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:59,795 INFO L130 PetriNetUnfolder]: 558/1230 cut-off events. [2022-12-13 13:13:59,795 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 13:13:59,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 1230 events. 558/1230 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7437 event pairs, 475 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 2395. Up to 1001 conditions per place. [2022-12-13 13:13:59,803 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 72 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2022-12-13 13:13:59,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 364 flow [2022-12-13 13:13:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:13:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:13:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-12-13 13:13:59,805 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4846390168970814 [2022-12-13 13:13:59,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-12-13 13:13:59,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-12-13 13:13:59,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:59,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-12-13 13:13:59,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,809 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 180 flow. Second operand 3 states and 631 transitions. [2022-12-13 13:13:59,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 364 flow [2022-12-13 13:13:59,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:13:59,811 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2022-12-13 13:13:59,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-12-13 13:13:59,811 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-13 13:13:59,812 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2022-12-13 13:13:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:59,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:59,812 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:59,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:13:59,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:13:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash -589616986, now seen corresponding path program 1 times [2022-12-13 13:13:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:59,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68460000] [2022-12-13 13:13:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:59,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:13:59,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:59,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68460000] [2022-12-13 13:13:59,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68460000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:13:59,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118360392] [2022-12-13 13:13:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:59,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:59,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:59,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:13:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:13:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:13:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:13:59,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:13:59,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118360392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:59,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:13:59,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 13:13:59,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034040632] [2022-12-13 13:13:59,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:13:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:13:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:14:00,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 434 [2022-12-13 13:14:00,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 190.3846153846154) internal successors, (2475), 13 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:00,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:00,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 434 [2022-12-13 13:14:00,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:00,215 INFO L130 PetriNetUnfolder]: 560/1240 cut-off events. [2022-12-13 13:14:00,215 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-12-13 13:14:00,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 1240 events. 560/1240 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7454 event pairs, 513 based on Foata normal form. 6/915 useless extension candidates. Maximal degree in co-relation 2421. Up to 1084 conditions per place. [2022-12-13 13:14:00,222 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2022-12-13 13:14:00,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 338 flow [2022-12-13 13:14:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:14:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:14:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2336 transitions. [2022-12-13 13:14:00,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4485407066052227 [2022-12-13 13:14:00,228 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2336 transitions. [2022-12-13 13:14:00,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2336 transitions. [2022-12-13 13:14:00,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:00,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2336 transitions. [2022-12-13 13:14:00,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 194.66666666666666) internal successors, (2336), 12 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:00,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 434.0) internal successors, (5642), 13 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:00,244 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 434.0) internal successors, (5642), 13 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:00,244 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 12 states and 2336 transitions. [2022-12-13 13:14:00,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 338 flow [2022-12-13 13:14:00,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:14:00,247 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 256 flow [2022-12-13 13:14:00,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2022-12-13 13:14:00,248 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2022-12-13 13:14:00,248 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 256 flow [2022-12-13 13:14:00,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 190.3846153846154) internal successors, (2475), 13 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:00,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:00,249 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:00,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 13:14:00,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:00,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:14:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2039847066, now seen corresponding path program 2 times [2022-12-13 13:14:00,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:00,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315828762] [2022-12-13 13:14:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:00,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:00,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315828762] [2022-12-13 13:14:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315828762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748274744] [2022-12-13 13:14:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:14:00,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:00,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:00,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:14:00,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:14:00,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:14:00,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:14:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:14:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:00,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:14:00,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748274744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:00,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:14:00,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 13:14:00,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460548504] [2022-12-13 13:14:00,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:00,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:14:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:14:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:14:00,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 434 [2022-12-13 13:14:00,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:00,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:00,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 434 [2022-12-13 13:14:00,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:00,991 INFO L130 PetriNetUnfolder]: 539/1212 cut-off events. [2022-12-13 13:14:00,991 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 13:14:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1212 events. 539/1212 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7405 event pairs, 230 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 2305. Up to 940 conditions per place. [2022-12-13 13:14:00,999 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 96 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2022-12-13 13:14:00,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 530 flow [2022-12-13 13:14:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:14:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:14:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 843 transitions. [2022-12-13 13:14:01,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48559907834101385 [2022-12-13 13:14:01,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 843 transitions. [2022-12-13 13:14:01,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 843 transitions. [2022-12-13 13:14:01,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:01,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 843 transitions. [2022-12-13 13:14:01,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.75) internal successors, (843), 4 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,014 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,014 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 256 flow. Second operand 4 states and 843 transitions. [2022-12-13 13:14:01,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 530 flow [2022-12-13 13:14:01,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 482 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 13:14:01,018 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 212 flow [2022-12-13 13:14:01,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2022-12-13 13:14:01,019 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-12-13 13:14:01,019 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 212 flow [2022-12-13 13:14:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:01,019 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:01,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:14:01,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:01,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:14:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1189280382, now seen corresponding path program 1 times [2022-12-13 13:14:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374019199] [2022-12-13 13:14:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:01,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374019199] [2022-12-13 13:14:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374019199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:01,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:01,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:14:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965231299] [2022-12-13 13:14:01,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:01,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:14:01,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:14:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:14:01,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 434 [2022-12-13 13:14:01,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 172.33333333333334) internal successors, (1034), 6 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:01,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 434 [2022-12-13 13:14:01,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:01,906 INFO L130 PetriNetUnfolder]: 392/955 cut-off events. [2022-12-13 13:14:01,906 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2022-12-13 13:14:01,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 955 events. 392/955 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6047 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 1829. Up to 692 conditions per place. [2022-12-13 13:14:01,909 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 86 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2022-12-13 13:14:01,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 106 transitions, 475 flow [2022-12-13 13:14:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:14:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:14:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1122 transitions. [2022-12-13 13:14:01,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308755760368664 [2022-12-13 13:14:01,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1122 transitions. [2022-12-13 13:14:01,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1122 transitions. [2022-12-13 13:14:01,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:01,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1122 transitions. [2022-12-13 13:14:01,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,916 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 212 flow. Second operand 6 states and 1122 transitions. [2022-12-13 13:14:01,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 106 transitions, 475 flow [2022-12-13 13:14:01,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 461 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 13:14:01,918 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 214 flow [2022-12-13 13:14:01,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2022-12-13 13:14:01,918 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2022-12-13 13:14:01,918 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 214 flow [2022-12-13 13:14:01,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.33333333333334) internal successors, (1034), 6 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:01,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:01,919 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 13:14:01,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:14:01,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 13:14:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1189251016, now seen corresponding path program 1 times [2022-12-13 13:14:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:01,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890793107] [2022-12-13 13:14:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:14:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:14:01,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:14:01,963 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:14:01,964 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-12-13 13:14:01,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-12-13 13:14:01,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-12-13 13:14:01,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-12-13 13:14:01,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-12-13 13:14:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-12-13 13:14:01,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-12-13 13:14:01,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:14:01,970 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-12-13 13:14:01,972 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:14:01,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 13:14:01,997 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:14:01,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-12-13 13:14:02,042 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-12-13 13:14:02,042 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 13:14:02,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2350 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-12-13 13:14:02,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 307 transitions, 632 flow [2022-12-13 13:14:02,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 307 transitions, 632 flow [2022-12-13 13:14:02,049 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:14:02,049 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 307 transitions, 632 flow [2022-12-13 13:14:02,050 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 307 transitions, 632 flow [2022-12-13 13:14:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-12-13 13:14:02,093 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-12-13 13:14:02,094 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 13:14:02,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2350 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-12-13 13:14:02,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 44960 [2022-12-13 13:14:05,935 INFO L134 LiptonReduction]: Checked pairs total: 94232 [2022-12-13 13:14:05,935 INFO L136 LiptonReduction]: Total number of compositions: 283 [2022-12-13 13:14:05,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:14:05,937 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;@119e718a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:14:05,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-12-13 13:14:05,938 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-12-13 13:14:05,938 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:14:05,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:05,938 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:14:05,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1552858, now seen corresponding path program 1 times [2022-12-13 13:14:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:05,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399838667] [2022-12-13 13:14:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:05,958 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 13:14:05,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:05,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399838667] [2022-12-13 13:14:05,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399838667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:05,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:05,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:14:05,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207147068] [2022-12-13 13:14:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:05,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:14:05,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:05,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:14:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:14:05,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 590 [2022-12-13 13:14:05,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 138 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:05,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:05,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 590 [2022-12-13 13:14:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:08,691 INFO L130 PetriNetUnfolder]: 25637/43483 cut-off events. [2022-12-13 13:14:08,691 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-12-13 13:14:08,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81458 conditions, 43483 events. 25637/43483 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 1975. Compared 385816 event pairs, 24304 based on Foata normal form. 4057/34593 useless extension candidates. Maximal degree in co-relation 33054. Up to 37841 conditions per place. [2022-12-13 13:14:08,882 INFO L137 encePairwiseOnDemand]: 547/590 looper letters, 75 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-12-13 13:14:08,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 368 flow [2022-12-13 13:14:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:14:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:14:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2022-12-13 13:14:08,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5022598870056497 [2022-12-13 13:14:08,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2022-12-13 13:14:08,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2022-12-13 13:14:08,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:08,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2022-12-13 13:14:08,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:08,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:08,889 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:08,889 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 294 flow. Second operand 3 states and 889 transitions. [2022-12-13 13:14:08,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 368 flow [2022-12-13 13:14:08,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:14:08,891 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 224 flow [2022-12-13 13:14:08,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2022-12-13 13:14:08,892 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -6 predicate places. [2022-12-13 13:14:08,892 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 224 flow [2022-12-13 13:14:08,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:08,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:08,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:14:08,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:14:08,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:08,893 INFO L85 PathProgramCache]: Analyzing trace with hash 48098894, now seen corresponding path program 1 times [2022-12-13 13:14:08,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:08,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601400100] [2022-12-13 13:14:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:08,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:08,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601400100] [2022-12-13 13:14:08,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601400100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:08,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014299943] [2022-12-13 13:14:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:08,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:08,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:08,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:14:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:14:08,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:08,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:08,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014299943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:08,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:14:08,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:14:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091999583] [2022-12-13 13:14:08,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:14:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:14:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:14:09,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 590 [2022-12-13 13:14:09,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 257.2857142857143) internal successors, (1801), 7 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:09,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:09,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 590 [2022-12-13 13:14:09,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:11,925 INFO L130 PetriNetUnfolder]: 25637/43486 cut-off events. [2022-12-13 13:14:11,925 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-12-13 13:14:11,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81474 conditions, 43486 events. 25637/43486 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 1975. Compared 385769 event pairs, 24304 based on Foata normal form. 0/30539 useless extension candidates. Maximal degree in co-relation 81461. Up to 37841 conditions per place. [2022-12-13 13:14:12,117 INFO L137 encePairwiseOnDemand]: 587/590 looper letters, 75 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2022-12-13 13:14:12,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 396 flow [2022-12-13 13:14:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:14:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:14:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1619 transitions. [2022-12-13 13:14:12,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45734463276836157 [2022-12-13 13:14:12,120 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1619 transitions. [2022-12-13 13:14:12,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1619 transitions. [2022-12-13 13:14:12,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:12,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1619 transitions. [2022-12-13 13:14:12,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.8333333333333) internal successors, (1619), 6 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:12,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:12,128 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:12,128 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 224 flow. Second operand 6 states and 1619 transitions. [2022-12-13 13:14:12,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 396 flow [2022-12-13 13:14:12,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:14:12,130 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 256 flow [2022-12-13 13:14:12,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-12-13 13:14:12,131 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 1 predicate places. [2022-12-13 13:14:12,131 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 256 flow [2022-12-13 13:14:12,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 257.2857142857143) internal successors, (1801), 7 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:12,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:12,132 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 13:14:12,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:14:12,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 13:14:12,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1644382565, now seen corresponding path program 2 times [2022-12-13 13:14:12,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885349063] [2022-12-13 13:14:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:12,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885349063] [2022-12-13 13:14:12,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885349063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639599147] [2022-12-13 13:14:12,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:14:12,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:12,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:12,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:12,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:14:12,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:14:12,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:14:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 13:14:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:12,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:14:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:14:12,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:14:12,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639599147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:12,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:14:12,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 13:14:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113933804] [2022-12-13 13:14:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:14:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:14:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:14:12,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 590 [2022-12-13 13:14:12,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:12,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:12,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 590 [2022-12-13 13:14:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:15,212 INFO L130 PetriNetUnfolder]: 25336/42591 cut-off events. [2022-12-13 13:14:15,212 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-12-13 13:14:15,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80585 conditions, 42591 events. 25336/42591 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 1865. Compared 372863 event pairs, 11704 based on Foata normal form. 0/29675 useless extension candidates. Maximal degree in co-relation 80550. Up to 37794 conditions per place. [2022-12-13 13:14:15,368 INFO L137 encePairwiseOnDemand]: 586/590 looper letters, 101 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2022-12-13 13:14:15,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 508 flow [2022-12-13 13:14:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:14:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:14:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2022-12-13 13:14:15,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4909604519774011 [2022-12-13 13:14:15,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2022-12-13 13:14:15,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2022-12-13 13:14:15,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:15,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2022-12-13 13:14:15,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:15,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:15,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:15,377 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 256 flow. Second operand 3 states and 869 transitions. [2022-12-13 13:14:15,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 508 flow [2022-12-13 13:14:15,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:14:15,379 INFO L231 Difference]: Finished difference. Result has 108 places, 102 transitions, 256 flow [2022-12-13 13:14:15,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=108, PETRI_TRANSITIONS=102} [2022-12-13 13:14:15,380 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 3 predicate places. [2022-12-13 13:14:15,380 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 102 transitions, 256 flow [2022-12-13 13:14:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:15,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:15,381 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 13:14:15,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:14:15,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 13:14:15,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1644382566, now seen corresponding path program 1 times [2022-12-13 13:14:15,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983026896] [2022-12-13 13:14:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:14:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983026896] [2022-12-13 13:14:15,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983026896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:15,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:15,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:14:15,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199241411] [2022-12-13 13:14:15,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:15,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:14:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:14:15,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:14:15,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 590 [2022-12-13 13:14:15,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 102 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:15,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:15,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 590 [2022-12-13 13:14:15,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:18,977 INFO L130 PetriNetUnfolder]: 24011/39761 cut-off events. [2022-12-13 13:14:18,977 INFO L131 PetriNetUnfolder]: For 1019/1019 co-relation queries the response was YES. [2022-12-13 13:14:19,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76664 conditions, 39761 events. 24011/39761 cut-off events. For 1019/1019 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 338445 event pairs, 20971 based on Foata normal form. 0/28534 useless extension candidates. Maximal degree in co-relation 76634. Up to 32792 conditions per place. [2022-12-13 13:14:19,128 INFO L137 encePairwiseOnDemand]: 585/590 looper letters, 115 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-12-13 13:14:19,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 566 flow [2022-12-13 13:14:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:14:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:14:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2022-12-13 13:14:19,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4937853107344633 [2022-12-13 13:14:19,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2022-12-13 13:14:19,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2022-12-13 13:14:19,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:19,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2022-12-13 13:14:19,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,136 INFO L175 Difference]: Start difference. First operand has 108 places, 102 transitions, 256 flow. Second operand 3 states and 874 transitions. [2022-12-13 13:14:19,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 566 flow [2022-12-13 13:14:19,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 139 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:14:19,141 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 256 flow [2022-12-13 13:14:19,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2022-12-13 13:14:19,142 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2022-12-13 13:14:19,142 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 256 flow [2022-12-13 13:14:19,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:19,143 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:19,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:14:19,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1335322892, now seen corresponding path program 1 times [2022-12-13 13:14:19,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:19,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563540035] [2022-12-13 13:14:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:19,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:19,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563540035] [2022-12-13 13:14:19,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563540035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261637627] [2022-12-13 13:14:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:19,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:19,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:19,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:14:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:14:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:19,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261637627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:19,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:14:19,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 13:14:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454562052] [2022-12-13 13:14:19,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:19,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:14:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:14:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:14:19,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 590 [2022-12-13 13:14:19,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 257.46153846153845) internal successors, (3347), 13 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:19,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:19,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 590 [2022-12-13 13:14:19,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:22,036 INFO L130 PetriNetUnfolder]: 24079/39961 cut-off events. [2022-12-13 13:14:22,036 INFO L131 PetriNetUnfolder]: For 1322/1322 co-relation queries the response was YES. [2022-12-13 13:14:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77822 conditions, 39961 events. 24079/39961 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 340151 event pairs, 22647 based on Foata normal form. 6/29187 useless extension candidates. Maximal degree in co-relation 77768. Up to 35439 conditions per place. [2022-12-13 13:14:22,201 INFO L137 encePairwiseOnDemand]: 587/590 looper letters, 74 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2022-12-13 13:14:22,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 106 transitions, 462 flow [2022-12-13 13:14:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:14:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:14:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3162 transitions. [2022-12-13 13:14:22,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44661016949152543 [2022-12-13 13:14:22,206 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3162 transitions. [2022-12-13 13:14:22,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3162 transitions. [2022-12-13 13:14:22,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:22,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3162 transitions. [2022-12-13 13:14:22,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 263.5) internal successors, (3162), 12 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:22,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 590.0) internal successors, (7670), 13 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:22,216 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 590.0) internal successors, (7670), 13 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:22,216 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 256 flow. Second operand 12 states and 3162 transitions. [2022-12-13 13:14:22,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 106 transitions, 462 flow [2022-12-13 13:14:22,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:14:22,251 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 334 flow [2022-12-13 13:14:22,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=334, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2022-12-13 13:14:22,251 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 17 predicate places. [2022-12-13 13:14:22,251 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 334 flow [2022-12-13 13:14:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 257.46153846153845) internal successors, (3347), 13 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:22,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:22,252 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:22,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:14:22,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 13:14:22,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash 43035692, now seen corresponding path program 2 times [2022-12-13 13:14:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686280431] [2022-12-13 13:14:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686280431] [2022-12-13 13:14:22,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686280431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:22,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:22,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:14:22,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045441918] [2022-12-13 13:14:22,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:14:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:14:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:14:22,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 590 [2022-12-13 13:14:22,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 239.33333333333334) internal successors, (1436), 6 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:22,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:22,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 590 [2022-12-13 13:14:22,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:25,928 INFO L130 PetriNetUnfolder]: 18100/30868 cut-off events. [2022-12-13 13:14:25,929 INFO L131 PetriNetUnfolder]: For 821/821 co-relation queries the response was YES. [2022-12-13 13:14:25,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59477 conditions, 30868 events. 18100/30868 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 263124 event pairs, 5193 based on Foata normal form. 1052/24245 useless extension candidates. Maximal degree in co-relation 59399. Up to 24118 conditions per place. [2022-12-13 13:14:26,055 INFO L137 encePairwiseOnDemand]: 579/590 looper letters, 173 selfloop transitions, 8 changer transitions 0/202 dead transitions. [2022-12-13 13:14:26,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 202 transitions, 904 flow [2022-12-13 13:14:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:14:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:14:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1609 transitions. [2022-12-13 13:14:26,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45451977401129945 [2022-12-13 13:14:26,059 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1609 transitions. [2022-12-13 13:14:26,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1609 transitions. [2022-12-13 13:14:26,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:26,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1609 transitions. [2022-12-13 13:14:26,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 268.1666666666667) internal successors, (1609), 6 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 590.0) internal successors, (4130), 7 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,064 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 334 flow. Second operand 6 states and 1609 transitions. [2022-12-13 13:14:26,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 202 transitions, 904 flow [2022-12-13 13:14:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 202 transitions, 856 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 13:14:26,067 INFO L231 Difference]: Finished difference. Result has 116 places, 103 transitions, 296 flow [2022-12-13 13:14:26,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=116, PETRI_TRANSITIONS=103} [2022-12-13 13:14:26,068 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 11 predicate places. [2022-12-13 13:14:26,068 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 103 transitions, 296 flow [2022-12-13 13:14:26,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.33333333333334) internal successors, (1436), 6 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:26,069 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:14:26,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash 42487603, now seen corresponding path program 1 times [2022-12-13 13:14:26,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:26,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873443615] [2022-12-13 13:14:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:26,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873443615] [2022-12-13 13:14:26,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873443615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494906940] [2022-12-13 13:14:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:26,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:26,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:26,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:26,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:14:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:26,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:14:26,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:26,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:14:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:26,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:26,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494906940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:26,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:14:26,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 13:14:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330529408] [2022-12-13 13:14:26,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:14:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:14:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:14:26,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 590 [2022-12-13 13:14:26,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 103 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 254.125) internal successors, (2033), 8 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:26,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 590 [2022-12-13 13:14:26,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:26,848 INFO L130 PetriNetUnfolder]: 1785/3440 cut-off events. [2022-12-13 13:14:26,848 INFO L131 PetriNetUnfolder]: For 908/908 co-relation queries the response was YES. [2022-12-13 13:14:26,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7598 conditions, 3440 events. 1785/3440 cut-off events. For 908/908 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24490 event pairs, 189 based on Foata normal form. 378/3231 useless extension candidates. Maximal degree in co-relation 7543. Up to 2092 conditions per place. [2022-12-13 13:14:26,860 INFO L137 encePairwiseOnDemand]: 586/590 looper letters, 106 selfloop transitions, 3 changer transitions 0/125 dead transitions. [2022-12-13 13:14:26,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 542 flow [2022-12-13 13:14:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:14:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:14:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1363 transitions. [2022-12-13 13:14:26,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46203389830508473 [2022-12-13 13:14:26,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1363 transitions. [2022-12-13 13:14:26,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1363 transitions. [2022-12-13 13:14:26,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:26,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1363 transitions. [2022-12-13 13:14:26,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.6) internal successors, (1363), 5 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 590.0) internal successors, (3540), 6 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,866 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 590.0) internal successors, (3540), 6 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,866 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 296 flow. Second operand 5 states and 1363 transitions. [2022-12-13 13:14:26,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 542 flow [2022-12-13 13:14:26,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 533 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 13:14:26,871 INFO L231 Difference]: Finished difference. Result has 89 places, 70 transitions, 209 flow [2022-12-13 13:14:26,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=89, PETRI_TRANSITIONS=70} [2022-12-13 13:14:26,872 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -16 predicate places. [2022-12-13 13:14:26,872 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 70 transitions, 209 flow [2022-12-13 13:14:26,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 254.125) internal successors, (2033), 8 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:26,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:26,873 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:26,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:14:27,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:27,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1334098826, now seen corresponding path program 1 times [2022-12-13 13:14:27,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:27,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559541818] [2022-12-13 13:14:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:27,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:27,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559541818] [2022-12-13 13:14:27,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559541818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:27,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:27,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:14:27,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400367075] [2022-12-13 13:14:27,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:27,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:14:27,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:14:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:14:27,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 590 [2022-12-13 13:14:27,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 70 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 241.33333333333334) internal successors, (1448), 6 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:27,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:27,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 590 [2022-12-13 13:14:27,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:27,883 INFO L130 PetriNetUnfolder]: 2565/4790 cut-off events. [2022-12-13 13:14:27,883 INFO L131 PetriNetUnfolder]: For 1728/1728 co-relation queries the response was YES. [2022-12-13 13:14:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10244 conditions, 4790 events. 2565/4790 cut-off events. For 1728/1728 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35963 event pairs, 583 based on Foata normal form. 0/3900 useless extension candidates. Maximal degree in co-relation 10190. Up to 1940 conditions per place. [2022-12-13 13:14:27,904 INFO L137 encePairwiseOnDemand]: 583/590 looper letters, 102 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2022-12-13 13:14:27,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 568 flow [2022-12-13 13:14:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:14:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:14:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1298 transitions. [2022-12-13 13:14:27,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44 [2022-12-13 13:14:27,908 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1298 transitions. [2022-12-13 13:14:27,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1298 transitions. [2022-12-13 13:14:27,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:27,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1298 transitions. [2022-12-13 13:14:27,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.6) internal successors, (1298), 5 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:27,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 590.0) internal successors, (3540), 6 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:27,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 590.0) internal successors, (3540), 6 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:27,914 INFO L175 Difference]: Start difference. First operand has 89 places, 70 transitions, 209 flow. Second operand 5 states and 1298 transitions. [2022-12-13 13:14:27,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 568 flow [2022-12-13 13:14:27,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 553 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 13:14:27,919 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 250 flow [2022-12-13 13:14:27,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2022-12-13 13:14:27,920 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -13 predicate places. [2022-12-13 13:14:27,920 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 250 flow [2022-12-13 13:14:27,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 241.33333333333334) internal successors, (1448), 6 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:27,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:27,920 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:27,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:14:27,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1334098604, now seen corresponding path program 1 times [2022-12-13 13:14:27,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:27,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132794748] [2022-12-13 13:14:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:28,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:28,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132794748] [2022-12-13 13:14:28,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132794748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:28,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:28,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:14:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740197102] [2022-12-13 13:14:28,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:14:28,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:14:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:14:28,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 590 [2022-12-13 13:14:28,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:28,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:28,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 590 [2022-12-13 13:14:28,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:28,544 INFO L130 PetriNetUnfolder]: 2052/3822 cut-off events. [2022-12-13 13:14:28,544 INFO L131 PetriNetUnfolder]: For 1375/1375 co-relation queries the response was YES. [2022-12-13 13:14:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 3822 events. 2052/3822 cut-off events. For 1375/1375 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26947 event pairs, 672 based on Foata normal form. 106/3484 useless extension candidates. Maximal degree in co-relation 8794. Up to 3231 conditions per place. [2022-12-13 13:14:28,557 INFO L137 encePairwiseOnDemand]: 583/590 looper letters, 77 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2022-12-13 13:14:28,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 460 flow [2022-12-13 13:14:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:14:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:14:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 995 transitions. [2022-12-13 13:14:28,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4216101694915254 [2022-12-13 13:14:28,559 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 995 transitions. [2022-12-13 13:14:28,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 995 transitions. [2022-12-13 13:14:28,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:28,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 995 transitions. [2022-12-13 13:14:28,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.75) internal successors, (995), 4 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:28,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:28,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:28,563 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 250 flow. Second operand 4 states and 995 transitions. [2022-12-13 13:14:28,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 460 flow [2022-12-13 13:14:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:14:28,566 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 244 flow [2022-12-13 13:14:28,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2022-12-13 13:14:28,566 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -16 predicate places. [2022-12-13 13:14:28,566 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 244 flow [2022-12-13 13:14:28,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:28,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:28,566 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:14:28,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash -587891437, now seen corresponding path program 1 times [2022-12-13 13:14:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:28,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819182191] [2022-12-13 13:14:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:28,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 13:14:28,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819182191] [2022-12-13 13:14:28,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819182191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994693187] [2022-12-13 13:14:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:28,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:28,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:28,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:14:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 13:14:28,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:14:28,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:14:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:14:29,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 13:14:33,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994693187] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:33,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:14:33,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 12] total 19 [2022-12-13 13:14:33,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995058477] [2022-12-13 13:14:33,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:33,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:14:33,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:14:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-12-13 13:14:33,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 590 [2022-12-13 13:14:33,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:33,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:33,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 590 [2022-12-13 13:14:33,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:34,234 INFO L130 PetriNetUnfolder]: 1753/3368 cut-off events. [2022-12-13 13:14:34,234 INFO L131 PetriNetUnfolder]: For 1378/1378 co-relation queries the response was YES. [2022-12-13 13:14:34,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7699 conditions, 3368 events. 1753/3368 cut-off events. For 1378/1378 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23700 event pairs, 108 based on Foata normal form. 0/3137 useless extension candidates. Maximal degree in co-relation 7642. Up to 2621 conditions per place. [2022-12-13 13:14:34,245 INFO L137 encePairwiseOnDemand]: 585/590 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 13:14:34,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 441 flow [2022-12-13 13:14:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:14:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:14:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1020 transitions. [2022-12-13 13:14:34,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4322033898305085 [2022-12-13 13:14:34,247 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1020 transitions. [2022-12-13 13:14:34,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1020 transitions. [2022-12-13 13:14:34,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:34,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1020 transitions. [2022-12-13 13:14:34,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:34,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:34,250 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 590.0) internal successors, (2950), 5 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:34,250 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 244 flow. Second operand 4 states and 1020 transitions. [2022-12-13 13:14:34,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 441 flow [2022-12-13 13:14:34,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:14:34,252 INFO L231 Difference]: Finished difference. Result has 87 places, 68 transitions, 238 flow [2022-12-13 13:14:34,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2022-12-13 13:14:34,253 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -18 predicate places. [2022-12-13 13:14:34,253 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 238 flow [2022-12-13 13:14:34,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:34,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:34,253 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:34,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:14:34,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 13:14:34,454 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:14:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash -492430314, now seen corresponding path program 1 times [2022-12-13 13:14:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:34,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899648438] [2022-12-13 13:14:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:34,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:34,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:34,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899648438] [2022-12-13 13:14:34,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899648438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:34,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956982472] [2022-12-13 13:14:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:34,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:34,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:34,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:14:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:14:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:34,702 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 7 treesize of output 6 [2022-12-13 13:14:34,746 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:14:34,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:14:34,760 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 13 treesize of output 15 [2022-12-13 13:14:34,800 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 13 treesize of output 15 [2022-12-13 13:14:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:14:34,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:40,843 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_527 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_527) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:14:42,853 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_527 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_527) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:14:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2022-12-13 13:14:42,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956982472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:42,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:14:42,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 13:14:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215232017] [2022-12-13 13:14:42,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:14:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:14:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=5, NotChecked=38, Total=156 [2022-12-13 13:14:43,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 590 [2022-12-13 13:14:43,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 238 flow. Second operand has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:43,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:43,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 590 [2022-12-13 13:14:43,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:59,067 WARN L233 SmtUtils]: Spent 14.03s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:15:01,071 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 13:15:15,113 WARN L233 SmtUtils]: Spent 14.03s on a formula simplification. DAG size of input: 23 DAG size of output: 16 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:15:17,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:19,184 WARN L539 Checker$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 13:15:21,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:23,213 WARN L539 Checker$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 13:15:25,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:27,261 WARN L539 Checker$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 13:15:29,378 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 [1] [2022-12-13 13:15:29,734 INFO L130 PetriNetUnfolder]: 3124/5614 cut-off events. [2022-12-13 13:15:29,734 INFO L131 PetriNetUnfolder]: For 2207/2207 co-relation queries the response was YES. [2022-12-13 13:15:29,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 5614 events. 3124/5614 cut-off events. For 2207/2207 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41293 event pairs, 504 based on Foata normal form. 86/4972 useless extension candidates. Maximal degree in co-relation 13249. Up to 3526 conditions per place. [2022-12-13 13:15:29,754 INFO L137 encePairwiseOnDemand]: 567/590 looper letters, 125 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2022-12-13 13:15:29,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 173 transitions, 872 flow [2022-12-13 13:15:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:15:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 13:15:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1817 transitions. [2022-12-13 13:15:29,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3421845574387947 [2022-12-13 13:15:29,757 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1817 transitions. [2022-12-13 13:15:29,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1817 transitions. [2022-12-13 13:15:29,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:29,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1817 transitions. [2022-12-13 13:15:29,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.88888888888889) internal successors, (1817), 9 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:29,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 590.0) internal successors, (5900), 10 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:29,762 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 590.0) internal successors, (5900), 10 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:29,762 INFO L175 Difference]: Start difference. First operand has 87 places, 68 transitions, 238 flow. Second operand 9 states and 1817 transitions. [2022-12-13 13:15:29,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 173 transitions, 872 flow [2022-12-13 13:15:29,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 173 transitions, 864 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:15:29,767 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 536 flow [2022-12-13 13:15:29,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=536, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2022-12-13 13:15:29,767 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -8 predicate places. [2022-12-13 13:15:29,767 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 536 flow [2022-12-13 13:15:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:29,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:29,768 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:29,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 13:15:29,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:15:29,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:15:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1474725604, now seen corresponding path program 2 times [2022-12-13 13:15:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:15:29,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88676090] [2022-12-13 13:15:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:15:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:15:30,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:15:30,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88676090] [2022-12-13 13:15:30,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88676090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:15:30,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419551770] [2022-12-13 13:15:30,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:15:30,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:15:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:15:30,129 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:15:30,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:15:30,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:15:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:30,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:15:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:30,235 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 7 treesize of output 6 [2022-12-13 13:15:30,293 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:15:30,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:15:30,308 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 13 treesize of output 15 [2022-12-13 13:15:30,341 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 13 treesize of output 15 [2022-12-13 13:15:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:15:30,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:15:38,378 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_592) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:15:38,386 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_592) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:15:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2022-12-13 13:15:38,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419551770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:15:38,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:15:38,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 13:15:38,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768339722] [2022-12-13 13:15:38,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:15:38,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:15:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:15:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:15:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=5, NotChecked=38, Total=156 [2022-12-13 13:15:40,462 WARN L539 Checker$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 13:15:42,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:44,468 WARN L539 Checker$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 13:15:46,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:48,475 WARN L539 Checker$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 13:15:50,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:52,482 WARN L539 Checker$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 13:15:54,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:15:56,487 WARN L539 Checker$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 13:15:58,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:00,493 WARN L539 Checker$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 13:16:02,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:04,498 WARN L539 Checker$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 13:16:06,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:08,503 WARN L539 Checker$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 13:16:10,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:12,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:14,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:16,514 WARN L539 Checker$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 13:16:18,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:20,521 WARN L539 Checker$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 13:16:22,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:24,527 WARN L539 Checker$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 13:16:26,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:28,532 WARN L539 Checker$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 13:16:30,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:32,537 WARN L539 Checker$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 13:16:34,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:36,543 WARN L539 Checker$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 13:16:38,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:40,548 WARN L539 Checker$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 13:16:42,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:44,553 WARN L539 Checker$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 13:16:46,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:48,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:50,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:52,565 WARN L539 Checker$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 13:16:54,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:16:56,571 WARN L539 Checker$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 13:16:58,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:00,577 WARN L539 Checker$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 13:17:02,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:04,582 WARN L539 Checker$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 13:17:06,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:08,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:10,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:12,594 WARN L539 Checker$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 13:17:14,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:16,599 WARN L539 Checker$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 13:17:18,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:20,604 WARN L539 Checker$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 13:17:22,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:24,610 WARN L539 Checker$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 13:17:26,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:28,617 WARN L539 Checker$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 13:17:30,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:32,622 WARN L539 Checker$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 13:17:34,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:36,628 WARN L539 Checker$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 13:17:38,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:40,634 WARN L539 Checker$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 13:17:42,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:44,642 WARN L539 Checker$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 13:17:46,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:48,647 WARN L539 Checker$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 13:17:50,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:52,653 WARN L539 Checker$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 13:17:54,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:17:56,658 WARN L539 Checker$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 13:17:58,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:00,663 WARN L539 Checker$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 13:18:02,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:04,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:06,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:06,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 590 [2022-12-13 13:18:06,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 536 flow. Second operand has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:06,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:18:06,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 590 [2022-12-13 13:18:06,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:18:28,715 WARN L233 SmtUtils]: Spent 20.02s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:18:30,718 WARN L539 Checker$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 13:18:38,762 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 23 DAG size of output: 16 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:18:40,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:42,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:44,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:46,852 WARN L539 Checker$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 13:18:48,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:50,891 WARN L539 Checker$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 13:18:52,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:54,930 WARN L539 Checker$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 13:18:56,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:18:58,980 WARN L539 Checker$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 13:18:59,446 INFO L130 PetriNetUnfolder]: 3637/6542 cut-off events. [2022-12-13 13:18:59,446 INFO L131 PetriNetUnfolder]: For 7787/7799 co-relation queries the response was YES. [2022-12-13 13:18:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20460 conditions, 6542 events. 3637/6542 cut-off events. For 7787/7799 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 48751 event pairs, 505 based on Foata normal form. 26/5781 useless extension candidates. Maximal degree in co-relation 20399. Up to 5151 conditions per place. [2022-12-13 13:18:59,474 INFO L137 encePairwiseOnDemand]: 567/590 looper letters, 105 selfloop transitions, 83 changer transitions 0/197 dead transitions. [2022-12-13 13:18:59,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 197 transitions, 1399 flow [2022-12-13 13:18:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:18:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:18:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1610 transitions. [2022-12-13 13:18:59,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3411016949152542 [2022-12-13 13:18:59,477 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1610 transitions. [2022-12-13 13:18:59,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1610 transitions. [2022-12-13 13:18:59,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:18:59,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1610 transitions. [2022-12-13 13:18:59,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.25) internal successors, (1610), 8 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:59,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 590.0) internal successors, (5310), 9 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:59,481 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 590.0) internal successors, (5310), 9 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:59,481 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 536 flow. Second operand 8 states and 1610 transitions. [2022-12-13 13:18:59,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 197 transitions, 1399 flow [2022-12-13 13:18:59,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1389 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 13:18:59,497 INFO L231 Difference]: Finished difference. Result has 107 places, 174 transitions, 1271 flow [2022-12-13 13:18:59,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1271, PETRI_PLACES=107, PETRI_TRANSITIONS=174} [2022-12-13 13:18:59,497 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2022-12-13 13:18:59,497 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 174 transitions, 1271 flow [2022-12-13 13:18:59,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:18:59,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:18:59,498 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:18:59,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 13:18:59,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:18:59,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:18:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:18:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1169907486, now seen corresponding path program 3 times [2022-12-13 13:18:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:18:59,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815062129] [2022-12-13 13:18:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:18:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:18:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:18:59,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:18:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815062129] [2022-12-13 13:18:59,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815062129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:18:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920576088] [2022-12-13 13:18:59,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:18:59,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:18:59,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:18:59,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:18:59,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 13:18:59,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 13:18:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:18:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:18:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:18:59,942 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 7 treesize of output 6 [2022-12-13 13:18:59,995 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:18:59,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:19:00,009 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 13 treesize of output 15 [2022-12-13 13:19:00,041 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 13 treesize of output 15 [2022-12-13 13:19:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:19:00,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:19:06,075 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_657 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_657) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:19:08,083 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_657 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_657) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:19:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2022-12-13 13:19:08,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920576088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:19:08,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:19:08,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 13:19:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078126942] [2022-12-13 13:19:08,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:19:08,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:19:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:19:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:19:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=5, NotChecked=38, Total=156 [2022-12-13 13:19:08,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 590 [2022-12-13 13:19:08,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 174 transitions, 1271 flow. Second operand has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:08,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:19:08,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 590 [2022-12-13 13:19:08,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:19:28,346 WARN L233 SmtUtils]: Spent 18.03s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:19:38,394 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 23 DAG size of output: 16 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:19:40,410 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 13:19:41,211 INFO L130 PetriNetUnfolder]: 3877/6819 cut-off events. [2022-12-13 13:19:41,211 INFO L131 PetriNetUnfolder]: For 14289/14333 co-relation queries the response was YES. [2022-12-13 13:19:41,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26270 conditions, 6819 events. 3877/6819 cut-off events. For 14289/14333 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49733 event pairs, 1859 based on Foata normal form. 25/6326 useless extension candidates. Maximal degree in co-relation 26204. Up to 6082 conditions per place. [2022-12-13 13:19:41,244 INFO L137 encePairwiseOnDemand]: 581/590 looper letters, 191 selfloop transitions, 22 changer transitions 0/222 dead transitions. [2022-12-13 13:19:41,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 222 transitions, 2034 flow [2022-12-13 13:19:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:19:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:19:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1565 transitions. [2022-12-13 13:19:41,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3315677966101695 [2022-12-13 13:19:41,247 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1565 transitions. [2022-12-13 13:19:41,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1565 transitions. [2022-12-13 13:19:41,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:19:41,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1565 transitions. [2022-12-13 13:19:41,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.625) internal successors, (1565), 8 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:41,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 590.0) internal successors, (5310), 9 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:41,251 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 590.0) internal successors, (5310), 9 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:41,251 INFO L175 Difference]: Start difference. First operand has 107 places, 174 transitions, 1271 flow. Second operand 8 states and 1565 transitions. [2022-12-13 13:19:41,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 222 transitions, 2034 flow [2022-12-13 13:19:41,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 222 transitions, 2016 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 13:19:41,276 INFO L231 Difference]: Finished difference. Result has 116 places, 192 transitions, 1524 flow [2022-12-13 13:19:41,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1524, PETRI_PLACES=116, PETRI_TRANSITIONS=192} [2022-12-13 13:19:41,277 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 11 predicate places. [2022-12-13 13:19:41,277 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 192 transitions, 1524 flow [2022-12-13 13:19:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:41,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:19:41,277 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:19:41,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 13:19:41,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 13:19:41,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:19:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:19:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1523364193, now seen corresponding path program 1 times [2022-12-13 13:19:41,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:19:41,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085307557] [2022-12-13 13:19:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:19:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:19:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:19:41,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:19:41,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085307557] [2022-12-13 13:19:41,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085307557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:19:41,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300797316] [2022-12-13 13:19:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:19:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:19:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:19:41,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:19:41,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 13:19:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:19:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:19:41,741 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 7 treesize of output 6 [2022-12-13 13:19:41,780 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:19:41,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:19:41,794 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 13 treesize of output 15 [2022-12-13 13:19:41,823 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 13 treesize of output 15 [2022-12-13 13:19:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:19:41,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:19:47,866 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_722 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_722) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:19:49,876 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_722 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_722) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-12-13 13:19:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2022-12-13 13:19:49,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300797316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:19:49,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:19:49,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 13:19:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072435121] [2022-12-13 13:19:49,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:19:49,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:19:49,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:19:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:19:49,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=5, NotChecked=38, Total=156 [2022-12-13 13:19:50,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 590 [2022-12-13 13:19:50,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 192 transitions, 1524 flow. Second operand has 13 states, 13 states have (on average 188.3846153846154) internal successors, (2449), 13 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:19:50,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:19:50,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 590 [2022-12-13 13:19:50,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:20:08,129 WARN L233 SmtUtils]: Spent 16.03s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:20:10,132 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 13:20:26,202 WARN L233 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 23 DAG size of output: 16 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:20:28,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:20:30,219 WARN L539 Checker$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 13:20:32,477 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 13:20:33,137 INFO L130 PetriNetUnfolder]: 4093/7269 cut-off events. [2022-12-13 13:20:33,137 INFO L131 PetriNetUnfolder]: For 18773/18815 co-relation queries the response was YES. [2022-12-13 13:20:33,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29424 conditions, 7269 events. 4093/7269 cut-off events. For 18773/18815 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 54174 event pairs, 1404 based on Foata normal form. 70/6802 useless extension candidates. Maximal degree in co-relation 29353. Up to 5230 conditions per place. [2022-12-13 13:20:33,175 INFO L137 encePairwiseOnDemand]: 571/590 looper letters, 166 selfloop transitions, 83 changer transitions 0/258 dead transitions. [2022-12-13 13:20:33,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 258 transitions, 2589 flow [2022-12-13 13:20:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:20:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 13:20:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1594 transitions. [2022-12-13 13:20:33,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33771186440677964 [2022-12-13 13:20:33,177 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1594 transitions. [2022-12-13 13:20:33,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1594 transitions. [2022-12-13 13:20:33,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:20:33,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1594 transitions. [2022-12-13 13:20:33,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.25) internal successors, (1594), 8 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:33,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 590.0) internal successors, (5310), 9 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:33,181 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 590.0) internal successors, (5310), 9 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:33,181 INFO L175 Difference]: Start difference. First operand has 116 places, 192 transitions, 1524 flow. Second operand 8 states and 1594 transitions. [2022-12-13 13:20:33,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 258 transitions, 2589 flow [2022-12-13 13:20:33,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 258 transitions, 2563 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 13:20:33,216 INFO L231 Difference]: Finished difference. Result has 124 places, 227 transitions, 2190 flow [2022-12-13 13:20:33,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2190, PETRI_PLACES=124, PETRI_TRANSITIONS=227} [2022-12-13 13:20:33,217 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 19 predicate places. [2022-12-13 13:20:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 227 transitions, 2190 flow [2022-12-13 13:20:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.3846153846154) internal successors, (2449), 13 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:33,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:20:33,217 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 13:20:33,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 13:20:33,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 13:20:33,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 13:20:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1061906122, now seen corresponding path program 1 times [2022-12-13 13:20:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:20:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364308018] [2022-12-13 13:20:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:20:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:20:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:20:33,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:20:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:20:33,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:20:33,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-12-13 13:20:33,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (40 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-12-13 13:20:33,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-12-13 13:20:33,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-12-13 13:20:33,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-12-13 13:20:33,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 13:20:33,488 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:20:33,489 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:20:33,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 13:20:33,509 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:20:33,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-12-13 13:20:33,594 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-12-13 13:20:33,594 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 13:20:33,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3785 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-12-13 13:20:33,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 389 transitions, 808 flow [2022-12-13 13:20:33,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 389 transitions, 808 flow [2022-12-13 13:20:33,605 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:20:33,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2022-12-13 13:20:33,605 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2022-12-13 13:20:33,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-12-13 13:20:33,684 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-12-13 13:20:33,684 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 13:20:33,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3785 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-12-13 13:20:33,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 87360 [2022-12-13 13:20:37,567 INFO L134 LiptonReduction]: Checked pairs total: 185201 [2022-12-13 13:20:37,567 INFO L136 LiptonReduction]: Total number of compositions: 348 [2022-12-13 13:20:37,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:20:37,569 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;@119e718a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:20:37,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-12-13 13:20:37,570 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 13:20:37,570 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:20:37,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:20:37,570 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:20:37,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 13:20:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2367137, now seen corresponding path program 1 times [2022-12-13 13:20:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:20:37,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756668860] [2022-12-13 13:20:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:20:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:20:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:37,582 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 13:20:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:20:37,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756668860] [2022-12-13 13:20:37,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756668860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:20:37,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:20:37,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:20:37,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985465347] [2022-12-13 13:20:37,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:20:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:20:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:20:37,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:20:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:20:37,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 737 [2022-12-13 13:20:37,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:20:37,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:20:37,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 737 [2022-12-13 13:20:37,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:21:52,788 INFO L130 PetriNetUnfolder]: 814387/1189069 cut-off events. [2022-12-13 13:21:52,788 INFO L131 PetriNetUnfolder]: For 5968/5968 co-relation queries the response was YES. [2022-12-13 13:21:54,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263873 conditions, 1189069 events. 814387/1189069 cut-off events. For 5968/5968 co-relation queries the response was YES. Maximal size of possible extension queue 37502. Compared 11767099 event pairs, 784690 based on Foata normal form. 112799/895349 useless extension candidates. Maximal degree in co-relation 164829. Up to 1071103 conditions per place. [2022-12-13 13:21:58,842 INFO L137 encePairwiseOnDemand]: 682/737 looper letters, 97 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-12-13 13:21:58,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 126 transitions, 480 flow [2022-12-13 13:21:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:21:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:21:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-12-13 13:21:58,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5083672546359114 [2022-12-13 13:21:58,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-12-13 13:21:58,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-12-13 13:21:58,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:21:58,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-12-13 13:21:58,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:58,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:58,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:58,848 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 386 flow. Second operand 3 states and 1124 transitions. [2022-12-13 13:21:58,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 126 transitions, 480 flow [2022-12-13 13:21:58,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:21:58,852 INFO L231 Difference]: Finished difference. Result has 127 places, 126 transitions, 292 flow [2022-12-13 13:21:58,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=127, PETRI_TRANSITIONS=126} [2022-12-13 13:21:58,852 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -8 predicate places. [2022-12-13 13:21:58,852 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 126 transitions, 292 flow [2022-12-13 13:21:58,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:58,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:21:58,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:21:58,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 13:21:58,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 13:21:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:21:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 73331221, now seen corresponding path program 1 times [2022-12-13 13:21:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:21:58,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115066536] [2022-12-13 13:21:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:21:58,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:21:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:21:58,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:21:58,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115066536] [2022-12-13 13:21:58,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115066536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:21:58,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158089417] [2022-12-13 13:21:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:21:58,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:21:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:21:58,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:21:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ec7410e-a8d8-4c96-9044-a97409aca8ae/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 13:21:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:21:58,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:21:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:21:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:21:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:21:58,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158089417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:21:58,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:21:58,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:21:58,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824322641] [2022-12-13 13:21:58,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:21:58,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:21:58,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:21:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:21:58,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:21:58,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 737 [2022-12-13 13:21:58,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 126 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 324.2857142857143) internal successors, (2270), 7 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:21:58,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:21:58,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 737 [2022-12-13 13:21:58,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand