./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_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_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/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_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/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_1f271d08-3fd6-43d7-8b3b-d664b51b1971/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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:28:11,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:28:11,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:28:11,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:28:11,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:28:11,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:28:11,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:28:11,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:28:11,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:28:11,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:28:11,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:28:11,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:28:11,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:28:11,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:28:11,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:28:11,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:28:11,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:28:11,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:28:11,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:28:11,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:28:11,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:28:11,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:28:11,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:28:11,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:28:11,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:28:11,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:28:11,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:28:11,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:28:11,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:28:11,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:28:11,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:28:11,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:28:11,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:28:11,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:28:11,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:28:11,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:28:11,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:28:11,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:28:11,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:28:11,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:28:11,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:28:11,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:28:11,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:28:11,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:28:11,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:28:11,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:28:11,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:28:11,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:28:11,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:28:11,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:28:11,890 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:28:11,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:28:11,891 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:28:11,891 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:28:11,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:28:11,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:28:11,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:28:11,892 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:28:11,892 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:28:11,892 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:28:11,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:28:11,892 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:28:11,893 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:28:11,893 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:28:11,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:28:11,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:28:11,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:28:11,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:28:11,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:28:11,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:28:11,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:28:11,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:28:11,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:28:11,895 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:28:11,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:28:11,895 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:28:11,895 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_1f271d08-3fd6-43d7-8b3b-d664b51b1971/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2022-12-13 17:28:12,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:28:12,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:28:12,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:28:12,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:28:12,109 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:28:12,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-12-13 17:28:14,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:28:14,840 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:28:14,841 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-12-13 17:28:14,849 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/data/e48d893ac/01af0b42c21344e4ace2a83c9399be94/FLAG380c19739 [2022-12-13 17:28:14,860 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/data/e48d893ac/01af0b42c21344e4ace2a83c9399be94 [2022-12-13 17:28:14,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:28:14,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:28:14,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:28:14,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:28:14,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:28:14,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:28:14" (1/1) ... [2022-12-13 17:28:14,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2e5c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:14, skipping insertion in model container [2022-12-13 17:28:14,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:28:14" (1/1) ... [2022-12-13 17:28:14,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:28:14,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:28:15,096 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_1f271d08-3fd6-43d7-8b3b-d664b51b1971/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2022-12-13 17:28:15,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:28:15,122 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:28:15,146 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_1f271d08-3fd6-43d7-8b3b-d664b51b1971/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2022-12-13 17:28:15,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:28:15,176 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:28:15,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15 WrapperNode [2022-12-13 17:28:15,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:28:15,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:28:15,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:28:15,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:28:15,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,209 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-12-13 17:28:15,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:28:15,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:28:15,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:28:15,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:28:15,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:28:15,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:28:15,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:28:15,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:28:15,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (1/1) ... [2022-12-13 17:28:15,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:28:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:15,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:28:15,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:28:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:28:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:28:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:28:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:28:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:28:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 17:28:15,288 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 17:28:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:28:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:28:15,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:28:15,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:28:15,290 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:28:15,392 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:28:15,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:28:15,590 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:28:15,595 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:28:15,595 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 17:28:15,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:28:15 BoogieIcfgContainer [2022-12-13 17:28:15,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:28:15,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:28:15,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:28:15,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:28:15,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:28:14" (1/3) ... [2022-12-13 17:28:15,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1daa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:28:15, skipping insertion in model container [2022-12-13 17:28:15,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:15" (2/3) ... [2022-12-13 17:28:15,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1daa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:28:15, skipping insertion in model container [2022-12-13 17:28:15,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:28:15" (3/3) ... [2022-12-13 17:28:15,603 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2022-12-13 17:28:15,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:28:15,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-13 17:28:15,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:28:15,686 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 17:28:15,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 141 transitions, 290 flow [2022-12-13 17:28:15,769 INFO L130 PetriNetUnfolder]: 17/188 cut-off events. [2022-12-13 17:28:15,769 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:28:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 17/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 560 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2022-12-13 17:28:15,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 141 transitions, 290 flow [2022-12-13 17:28:15,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 141 transitions, 290 flow [2022-12-13 17:28:15,781 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:28:15,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 141 transitions, 290 flow [2022-12-13 17:28:15,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 141 transitions, 290 flow [2022-12-13 17:28:15,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 141 transitions, 290 flow [2022-12-13 17:28:15,821 INFO L130 PetriNetUnfolder]: 17/188 cut-off events. [2022-12-13 17:28:15,821 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:28:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 17/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 560 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2022-12-13 17:28:15,824 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2022-12-13 17:28:18,853 INFO L134 LiptonReduction]: Checked pairs total: 9695 [2022-12-13 17:28:18,853 INFO L136 LiptonReduction]: Total number of compositions: 127 [2022-12-13 17:28:18,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:28:18,867 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;@78db726c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:28:18,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-12-13 17:28:18,869 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 17:28:18,869 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:28:18,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:18,869 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:28:18,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 17:28:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 17056, now seen corresponding path program 1 times [2022-12-13 17:28:18,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21356272] [2022-12-13 17:28:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:18,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:19,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21356272] [2022-12-13 17:28:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21356272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:19,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:19,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:28:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400529824] [2022-12-13 17:28:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:19,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 268 [2022-12-13 17:28:19,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:19,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 268 [2022-12-13 17:28:19,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:19,206 INFO L130 PetriNetUnfolder]: 181/441 cut-off events. [2022-12-13 17:28:19,206 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:28:19,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 441 events. 181/441 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2316 event pairs, 156 based on Foata normal form. 16/308 useless extension candidates. Maximal degree in co-relation 805. Up to 353 conditions per place. [2022-12-13 17:28:19,209 INFO L137 encePairwiseOnDemand]: 252/268 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-12-13 17:28:19,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 192 flow [2022-12-13 17:28:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2022-12-13 17:28:19,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5236318407960199 [2022-12-13 17:28:19,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2022-12-13 17:28:19,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2022-12-13 17:28:19,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:19,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2022-12-13 17:28:19,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,230 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 108 flow. Second operand 3 states and 421 transitions. [2022-12-13 17:28:19,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 192 flow [2022-12-13 17:28:19,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:28:19,234 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 88 flow [2022-12-13 17:28:19,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-12-13 17:28:19,238 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2022-12-13 17:28:19,239 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 88 flow [2022-12-13 17:28:19,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:19,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:28:19,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:28:19,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 17:28:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash 17057, now seen corresponding path program 1 times [2022-12-13 17:28:19,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:19,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684118899] [2022-12-13 17:28:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:19,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:19,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684118899] [2022-12-13 17:28:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684118899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:19,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:19,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:28:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004985624] [2022-12-13 17:28:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:19,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:19,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 268 [2022-12-13 17:28:19,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:19,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 268 [2022-12-13 17:28:19,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:19,461 INFO L130 PetriNetUnfolder]: 180/436 cut-off events. [2022-12-13 17:28:19,461 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 17:28:19,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 436 events. 180/436 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2181 event pairs, 154 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 836. Up to 382 conditions per place. [2022-12-13 17:28:19,464 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 42 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-12-13 17:28:19,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 202 flow [2022-12-13 17:28:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2022-12-13 17:28:19,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5124378109452736 [2022-12-13 17:28:19,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2022-12-13 17:28:19,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2022-12-13 17:28:19,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:19,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2022-12-13 17:28:19,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,469 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 88 flow. Second operand 3 states and 412 transitions. [2022-12-13 17:28:19,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 202 flow [2022-12-13 17:28:19,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:19,471 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2022-12-13 17:28:19,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-12-13 17:28:19,471 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2022-12-13 17:28:19,472 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2022-12-13 17:28:19,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:19,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:28:19,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:28:19,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 17:28:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 508462503, now seen corresponding path program 1 times [2022-12-13 17:28:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062938393] [2022-12-13 17:28:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062938393] [2022-12-13 17:28:19,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062938393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345016776] [2022-12-13 17:28:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:19,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:19,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:19,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:28:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:19,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:28:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:19,675 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 17:28:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:19,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:19,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345016776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:19,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:19,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 17:28:19,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865739958] [2022-12-13 17:28:19,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:19,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:28:19,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:28:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:28:19,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 268 [2022-12-13 17:28:19,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 120.71428571428571) internal successors, (845), 7 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:19,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 268 [2022-12-13 17:28:19,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:19,933 INFO L130 PetriNetUnfolder]: 24/83 cut-off events. [2022-12-13 17:28:19,934 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 17:28:19,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 83 events. 24/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 260 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 155. Up to 50 conditions per place. [2022-12-13 17:28:19,935 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-12-13 17:28:19,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2022-12-13 17:28:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:28:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2022-12-13 17:28:19,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47294776119402987 [2022-12-13 17:28:19,937 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2022-12-13 17:28:19,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2022-12-13 17:28:19,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:19,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2022-12-13 17:28:19,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,943 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 507 transitions. [2022-12-13 17:28:19,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2022-12-13 17:28:19,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 17:28:19,944 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2022-12-13 17:28:19,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-12-13 17:28:19,945 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2022-12-13 17:28:19,945 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2022-12-13 17:28:19,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.71428571428571) internal successors, (845), 7 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:19,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:19,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:28:19,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:20,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:20,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 17:28:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1417564092, now seen corresponding path program 1 times [2022-12-13 17:28:20,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:20,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874839119] [2022-12-13 17:28:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:20,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874839119] [2022-12-13 17:28:20,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874839119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:20,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:20,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494846401] [2022-12-13 17:28:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:20,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2022-12-13 17:28:20,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:20,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:20,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2022-12-13 17:28:20,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:20,434 INFO L130 PetriNetUnfolder]: 20/71 cut-off events. [2022-12-13 17:28:20,435 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 17:28:20,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 71 events. 20/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 0 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 130. Up to 50 conditions per place. [2022-12-13 17:28:20,435 INFO L137 encePairwiseOnDemand]: 264/268 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2022-12-13 17:28:20,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 87 flow [2022-12-13 17:28:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:28:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2022-12-13 17:28:20,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.457089552238806 [2022-12-13 17:28:20,438 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2022-12-13 17:28:20,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2022-12-13 17:28:20,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:20,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2022-12-13 17:28:20,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:20,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:20,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:20,443 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 53 flow. Second operand 4 states and 490 transitions. [2022-12-13 17:28:20,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 87 flow [2022-12-13 17:28:20,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 83 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:20,444 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 50 flow [2022-12-13 17:28:20,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-12-13 17:28:20,445 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -16 predicate places. [2022-12-13 17:28:20,445 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 50 flow [2022-12-13 17:28:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:20,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:20,446 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:28:20,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:28:20,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 17:28:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1417531278, now seen corresponding path program 1 times [2022-12-13 17:28:20,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64283068] [2022-12-13 17:28:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:28:20,460 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:28:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:28:20,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:28:20,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:28:20,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-12-13 17:28:20,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-12-13 17:28:20,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-12-13 17:28:20,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-12-13 17:28:20,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-12-13 17:28:20,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-12-13 17:28:20,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-12-13 17:28:20,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-12-13 17:28:20,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-12-13 17:28:20,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-12-13 17:28:20,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-12-13 17:28:20,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-12-13 17:28:20,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-12-13 17:28:20,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-12-13 17:28:20,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-12-13 17:28:20,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-12-13 17:28:20,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-12-13 17:28:20,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-12-13 17:28:20,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-12-13 17:28:20,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-12-13 17:28:20,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-12-13 17:28:20,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-12-13 17:28:20,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-12-13 17:28:20,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-12-13 17:28:20,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-12-13 17:28:20,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:28:20,493 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 17:28:20,495 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:28:20,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:28:20,516 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:28:20,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 184 transitions, 386 flow [2022-12-13 17:28:20,540 INFO L130 PetriNetUnfolder]: 31/308 cut-off events. [2022-12-13 17:28:20,541 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:28:20,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 308 events. 31/308 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1107 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-12-13 17:28:20,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 184 transitions, 386 flow [2022-12-13 17:28:20,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 184 transitions, 386 flow [2022-12-13 17:28:20,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:28:20,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 184 transitions, 386 flow [2022-12-13 17:28:20,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 184 transitions, 386 flow [2022-12-13 17:28:20,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 184 transitions, 386 flow [2022-12-13 17:28:20,566 INFO L130 PetriNetUnfolder]: 31/308 cut-off events. [2022-12-13 17:28:20,566 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 17:28:20,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 308 events. 31/308 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1107 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-12-13 17:28:20,572 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2022-12-13 17:28:23,396 INFO L134 LiptonReduction]: Checked pairs total: 35065 [2022-12-13 17:28:23,397 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-12-13 17:28:23,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:28:23,398 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;@78db726c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:28:23,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-12-13 17:28:23,399 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 17:28:23,400 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:28:23,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:23,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:28:23,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:23,400 INFO L85 PathProgramCache]: Analyzing trace with hash 29508, now seen corresponding path program 1 times [2022-12-13 17:28:23,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:23,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490891149] [2022-12-13 17:28:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:23,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:23,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490891149] [2022-12-13 17:28:23,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490891149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:23,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:23,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:28:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466606008] [2022-12-13 17:28:23,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:23,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:23,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 346 [2022-12-13 17:28:23,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:23,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:23,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 346 [2022-12-13 17:28:23,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:24,291 INFO L130 PetriNetUnfolder]: 5944/10008 cut-off events. [2022-12-13 17:28:24,291 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-12-13 17:28:24,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19516 conditions, 10008 events. 5944/10008 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 72308 event pairs, 5148 based on Foata normal form. 471/6709 useless extension candidates. Maximal degree in co-relation 11685. Up to 8188 conditions per place. [2022-12-13 17:28:24,350 INFO L137 encePairwiseOnDemand]: 322/346 looper letters, 70 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2022-12-13 17:28:24,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 332 flow [2022-12-13 17:28:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-12-13 17:28:24,354 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5510597302504817 [2022-12-13 17:28:24,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-12-13 17:28:24,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-12-13 17:28:24,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:24,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-12-13 17:28:24,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:24,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:24,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:24,357 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 176 flow. Second operand 3 states and 572 transitions. [2022-12-13 17:28:24,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 332 flow [2022-12-13 17:28:24,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:28:24,359 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 140 flow [2022-12-13 17:28:24,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2022-12-13 17:28:24,360 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2022-12-13 17:28:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 140 flow [2022-12-13 17:28:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:24,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:24,360 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:28:24,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:28:24,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash 29507, now seen corresponding path program 1 times [2022-12-13 17:28:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025894486] [2022-12-13 17:28:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:24,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025894486] [2022-12-13 17:28:24,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025894486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:24,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:24,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:28:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878351490] [2022-12-13 17:28:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:24,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 346 [2022-12-13 17:28:24,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:24,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:24,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 346 [2022-12-13 17:28:24,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:25,132 INFO L130 PetriNetUnfolder]: 5943/10115 cut-off events. [2022-12-13 17:28:25,132 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-12-13 17:28:25,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 10115 events. 5943/10115 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 73795 event pairs, 2808 based on Foata normal form. 0/6562 useless extension candidates. Maximal degree in co-relation 17136. Up to 9394 conditions per place. [2022-12-13 17:28:25,164 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 17:28:25,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 294 flow [2022-12-13 17:28:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2022-12-13 17:28:25,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5154142581888247 [2022-12-13 17:28:25,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2022-12-13 17:28:25,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2022-12-13 17:28:25,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:25,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2022-12-13 17:28:25,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:25,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:25,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:25,170 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 140 flow. Second operand 3 states and 535 transitions. [2022-12-13 17:28:25,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 294 flow [2022-12-13 17:28:25,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:25,179 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2022-12-13 17:28:25,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-12-13 17:28:25,179 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2022-12-13 17:28:25,179 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2022-12-13 17:28:25,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:25,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:25,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:28:25,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:28:25,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1501884933, now seen corresponding path program 1 times [2022-12-13 17:28:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596901427] [2022-12-13 17:28:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:25,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596901427] [2022-12-13 17:28:25,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596901427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:25,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315028587] [2022-12-13 17:28:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:25,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:25,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:28:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:28:25,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:25,295 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 17:28:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:25,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315028587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:25,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:25,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 17:28:25,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219041307] [2022-12-13 17:28:25,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:25,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:28:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:28:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:28:25,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 346 [2022-12-13 17:28:25,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 154.875) internal successors, (1239), 8 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:25,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:25,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 346 [2022-12-13 17:28:25,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:26,385 INFO L130 PetriNetUnfolder]: 5461/8919 cut-off events. [2022-12-13 17:28:26,385 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2022-12-13 17:28:26,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18431 conditions, 8919 events. 5461/8919 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64230 event pairs, 1 based on Foata normal form. 14/5915 useless extension candidates. Maximal degree in co-relation 2187. Up to 6941 conditions per place. [2022-12-13 17:28:26,420 INFO L137 encePairwiseOnDemand]: 340/346 looper letters, 109 selfloop transitions, 5 changer transitions 0/125 dead transitions. [2022-12-13 17:28:26,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 125 transitions, 506 flow [2022-12-13 17:28:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:28:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:28:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 882 transitions. [2022-12-13 17:28:26,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5098265895953757 [2022-12-13 17:28:26,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 882 transitions. [2022-12-13 17:28:26,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 882 transitions. [2022-12-13 17:28:26,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:26,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 882 transitions. [2022-12-13 17:28:26,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,429 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 5 states and 882 transitions. [2022-12-13 17:28:26,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 125 transitions, 506 flow [2022-12-13 17:28:26,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:28:26,433 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 156 flow [2022-12-13 17:28:26,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2022-12-13 17:28:26,433 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2022-12-13 17:28:26,434 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 156 flow [2022-12-13 17:28:26,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.875) internal successors, (1239), 8 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:26,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:28:26,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:28:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:26,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1502146960, now seen corresponding path program 1 times [2022-12-13 17:28:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115122124] [2022-12-13 17:28:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115122124] [2022-12-13 17:28:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115122124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:26,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:26,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576147612] [2022-12-13 17:28:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:26,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:26,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 346 [2022-12-13 17:28:26,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:26,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 346 [2022-12-13 17:28:26,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:27,567 INFO L130 PetriNetUnfolder]: 4351/7636 cut-off events. [2022-12-13 17:28:27,567 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2022-12-13 17:28:27,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15870 conditions, 7636 events. 4351/7636 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 56646 event pairs, 153 based on Foata normal form. 205/5625 useless extension candidates. Maximal degree in co-relation 15295. Up to 5525 conditions per place. [2022-12-13 17:28:27,590 INFO L137 encePairwiseOnDemand]: 339/346 looper letters, 104 selfloop transitions, 7 changer transitions 0/122 dead transitions. [2022-12-13 17:28:27,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 532 flow [2022-12-13 17:28:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:28:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:28:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1033 transitions. [2022-12-13 17:28:27,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4975915221579961 [2022-12-13 17:28:27,592 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1033 transitions. [2022-12-13 17:28:27,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1033 transitions. [2022-12-13 17:28:27,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:27,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1033 transitions. [2022-12-13 17:28:27,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:27,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 346.0) internal successors, (2422), 7 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:27,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 346.0) internal successors, (2422), 7 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:27,597 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 156 flow. Second operand 6 states and 1033 transitions. [2022-12-13 17:28:27,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 532 flow [2022-12-13 17:28:27,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 122 transitions, 514 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 17:28:27,602 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 160 flow [2022-12-13 17:28:27,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2022-12-13 17:28:27,603 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2022-12-13 17:28:27,603 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 160 flow [2022-12-13 17:28:27,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:27,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:27,603 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:27,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:28:27,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -678086127, now seen corresponding path program 1 times [2022-12-13 17:28:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:27,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328326552] [2022-12-13 17:28:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:27,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328326552] [2022-12-13 17:28:27,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328326552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:27,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084542330] [2022-12-13 17:28:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:27,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:27,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 346 [2022-12-13 17:28:27,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:27,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:27,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 346 [2022-12-13 17:28:27,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:28,382 INFO L130 PetriNetUnfolder]: 3605/6194 cut-off events. [2022-12-13 17:28:28,382 INFO L131 PetriNetUnfolder]: For 939/939 co-relation queries the response was YES. [2022-12-13 17:28:28,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13161 conditions, 6194 events. 3605/6194 cut-off events. For 939/939 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 41008 event pairs, 1083 based on Foata normal form. 0/4967 useless extension candidates. Maximal degree in co-relation 12632. Up to 4172 conditions per place. [2022-12-13 17:28:28,398 INFO L137 encePairwiseOnDemand]: 333/346 looper letters, 105 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2022-12-13 17:28:28,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 124 transitions, 540 flow [2022-12-13 17:28:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:28:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:28:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 837 transitions. [2022-12-13 17:28:28,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4838150289017341 [2022-12-13 17:28:28,401 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 837 transitions. [2022-12-13 17:28:28,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 837 transitions. [2022-12-13 17:28:28,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:28,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 837 transitions. [2022-12-13 17:28:28,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.4) internal successors, (837), 5 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,404 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,404 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 160 flow. Second operand 5 states and 837 transitions. [2022-12-13 17:28:28,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 124 transitions, 540 flow [2022-12-13 17:28:28,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:28:28,408 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 223 flow [2022-12-13 17:28:28,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2022-12-13 17:28:28,408 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2022-12-13 17:28:28,408 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 223 flow [2022-12-13 17:28:28,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:28,409 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:28,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:28:28,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1263312475, now seen corresponding path program 1 times [2022-12-13 17:28:28,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:28,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19722601] [2022-12-13 17:28:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:28,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:28,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19722601] [2022-12-13 17:28:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19722601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415940769] [2022-12-13 17:28:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:28,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:28,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:28:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:28:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:28,594 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 17:28:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:28,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:28:28,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415940769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:28,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:28:28,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-12-13 17:28:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886910599] [2022-12-13 17:28:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:28:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:28:28,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:28:28,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 346 [2022-12-13 17:28:28,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:28,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 346 [2022-12-13 17:28:28,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:29,262 INFO L130 PetriNetUnfolder]: 2787/5228 cut-off events. [2022-12-13 17:28:29,263 INFO L131 PetriNetUnfolder]: For 3135/3330 co-relation queries the response was YES. [2022-12-13 17:28:29,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12213 conditions, 5228 events. 2787/5228 cut-off events. For 3135/3330 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 36676 event pairs, 112 based on Foata normal form. 183/4442 useless extension candidates. Maximal degree in co-relation 10706. Up to 4320 conditions per place. [2022-12-13 17:28:29,279 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 76 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2022-12-13 17:28:29,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 505 flow [2022-12-13 17:28:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:28:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 687 transitions. [2022-12-13 17:28:29,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4963872832369942 [2022-12-13 17:28:29,280 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 687 transitions. [2022-12-13 17:28:29,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 687 transitions. [2022-12-13 17:28:29,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:29,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 687 transitions. [2022-12-13 17:28:29,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:29,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:29,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:29,283 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 223 flow. Second operand 4 states and 687 transitions. [2022-12-13 17:28:29,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 505 flow [2022-12-13 17:28:29,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:29,286 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 216 flow [2022-12-13 17:28:29,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2022-12-13 17:28:29,286 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2022-12-13 17:28:29,287 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 216 flow [2022-12-13 17:28:29,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:29,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:29,287 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:28:29,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:28:29,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 17:28:29,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 17:28:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash 500028242, now seen corresponding path program 1 times [2022-12-13 17:28:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:29,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295479192] [2022-12-13 17:28:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:28:29,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:28:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:28:29,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:28:29,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-12-13 17:28:29,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-12-13 17:28:29,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-12-13 17:28:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-12-13 17:28:29,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:28:29,533 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:29,534 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:28:29,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:28:29,558 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:28:29,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 227 transitions, 484 flow [2022-12-13 17:28:29,622 INFO L130 PetriNetUnfolder]: 50/471 cut-off events. [2022-12-13 17:28:29,622 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:28:29,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 471 events. 50/471 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1882 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 316. Up to 16 conditions per place. [2022-12-13 17:28:29,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 227 transitions, 484 flow [2022-12-13 17:28:29,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 227 transitions, 484 flow [2022-12-13 17:28:29,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:28:29,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 227 transitions, 484 flow [2022-12-13 17:28:29,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 227 transitions, 484 flow [2022-12-13 17:28:29,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 227 transitions, 484 flow [2022-12-13 17:28:29,667 INFO L130 PetriNetUnfolder]: 50/471 cut-off events. [2022-12-13 17:28:29,667 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:28:29,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 471 events. 50/471 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1882 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 316. Up to 16 conditions per place. [2022-12-13 17:28:29,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2022-12-13 17:28:32,488 INFO L134 LiptonReduction]: Checked pairs total: 64669 [2022-12-13 17:28:32,488 INFO L136 LiptonReduction]: Total number of compositions: 187 [2022-12-13 17:28:32,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:28:32,490 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;@78db726c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:28:32,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-12-13 17:28:32,492 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 17:28:32,492 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:28:32,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:32,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:28:32,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:28:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 44079, now seen corresponding path program 1 times [2022-12-13 17:28:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:32,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93576282] [2022-12-13 17:28:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:32,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:32,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:32,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93576282] [2022-12-13 17:28:32,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93576282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:32,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:32,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:28:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758761014] [2022-12-13 17:28:32,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:32,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 414 [2022-12-13 17:28:32,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:32,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:32,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 414 [2022-12-13 17:28:32,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:42,703 INFO L130 PetriNetUnfolder]: 105987/156630 cut-off events. [2022-12-13 17:28:42,703 INFO L131 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2022-12-13 17:28:42,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305063 conditions, 156630 events. 105987/156630 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 4980. Compared 1317057 event pairs, 90585 based on Foata normal form. 11336/111881 useless extension candidates. Maximal degree in co-relation 70727. Up to 125834 conditions per place. [2022-12-13 17:28:43,511 INFO L137 encePairwiseOnDemand]: 382/414 looper letters, 93 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2022-12-13 17:28:43,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 450 flow [2022-12-13 17:28:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2022-12-13 17:28:43,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5764895330112721 [2022-12-13 17:28:43,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2022-12-13 17:28:43,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2022-12-13 17:28:43,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:43,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2022-12-13 17:28:43,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:43,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:43,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:43,519 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 242 flow. Second operand 3 states and 716 transitions. [2022-12-13 17:28:43,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 450 flow [2022-12-13 17:28:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:28:43,524 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 190 flow [2022-12-13 17:28:43,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2022-12-13 17:28:43,525 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2022-12-13 17:28:43,525 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 190 flow [2022-12-13 17:28:43,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:43,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:43,526 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:28:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:28:43,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:28:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 44081, now seen corresponding path program 1 times [2022-12-13 17:28:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:43,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437695161] [2022-12-13 17:28:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437695161] [2022-12-13 17:28:43,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437695161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:43,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:43,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:28:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592594995] [2022-12-13 17:28:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:43,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 414 [2022-12-13 17:28:43,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:43,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:43,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 414 [2022-12-13 17:28:43,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:53,801 INFO L130 PetriNetUnfolder]: 105986/159305 cut-off events. [2022-12-13 17:28:53,801 INFO L131 PetriNetUnfolder]: For 4754/4754 co-relation queries the response was YES. [2022-12-13 17:28:53,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313672 conditions, 159305 events. 105986/159305 cut-off events. For 4754/4754 co-relation queries the response was YES. Maximal size of possible extension queue 5136. Compared 1362889 event pairs, 68893 based on Foata normal form. 0/105644 useless extension candidates. Maximal degree in co-relation 264187. Up to 146867 conditions per place. [2022-12-13 17:28:54,481 INFO L137 encePairwiseOnDemand]: 410/414 looper letters, 72 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-12-13 17:28:54,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 368 flow [2022-12-13 17:28:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:28:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2022-12-13 17:28:54,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5249597423510467 [2022-12-13 17:28:54,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2022-12-13 17:28:54,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2022-12-13 17:28:54,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:54,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2022-12-13 17:28:54,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,488 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 190 flow. Second operand 3 states and 652 transitions. [2022-12-13 17:28:54,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 368 flow [2022-12-13 17:28:54,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:28:54,950 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 198 flow [2022-12-13 17:28:54,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2022-12-13 17:28:54,950 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -5 predicate places. [2022-12-13 17:28:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 198 flow [2022-12-13 17:28:54,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:54,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:54,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:28:54,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:28:54,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:28:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2089576136, now seen corresponding path program 1 times [2022-12-13 17:28:54,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65684747] [2022-12-13 17:28:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:54,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65684747] [2022-12-13 17:28:54,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65684747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:54,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134515178] [2022-12-13 17:28:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:54,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:54,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:54,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:28:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:55,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:28:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:55,060 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 17:28:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:55,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:55,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134515178] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:55,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:55,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 17:28:55,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464807095] [2022-12-13 17:28:55,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:55,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:28:55,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:28:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:28:55,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2022-12-13 17:28:55,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:55,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:55,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2022-12-13 17:28:55,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:57,667 INFO L130 PetriNetUnfolder]: 18380/29615 cut-off events. [2022-12-13 17:28:57,667 INFO L131 PetriNetUnfolder]: For 10220/10220 co-relation queries the response was YES. [2022-12-13 17:28:57,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66137 conditions, 29615 events. 18380/29615 cut-off events. For 10220/10220 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 236881 event pairs, 0 based on Foata normal form. 2562/26204 useless extension candidates. Maximal degree in co-relation 6988. Up to 17862 conditions per place. [2022-12-13 17:28:57,793 INFO L137 encePairwiseOnDemand]: 410/414 looper letters, 119 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2022-12-13 17:28:57,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 139 transitions, 555 flow [2022-12-13 17:28:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:28:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:28:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1257 transitions. [2022-12-13 17:28:57,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5060386473429952 [2022-12-13 17:28:57,796 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1257 transitions. [2022-12-13 17:28:57,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1257 transitions. [2022-12-13 17:28:57,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:57,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1257 transitions. [2022-12-13 17:28:57,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.5) internal successors, (1257), 6 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:57,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 414.0) internal successors, (2898), 7 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:57,801 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 414.0) internal successors, (2898), 7 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:57,801 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 198 flow. Second operand 6 states and 1257 transitions. [2022-12-13 17:28:57,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 139 transitions, 555 flow [2022-12-13 17:28:57,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 547 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 17:28:57,821 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 153 flow [2022-12-13 17:28:57,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2022-12-13 17:28:57,822 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -16 predicate places. [2022-12-13 17:28:57,822 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 153 flow [2022-12-13 17:28:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:57,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:57,823 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:28:57,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:28:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:28:58,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:28:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2089896805, now seen corresponding path program 1 times [2022-12-13 17:28:58,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:58,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318189417] [2022-12-13 17:28:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:58,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318189417] [2022-12-13 17:28:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318189417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:58,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:58,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409507997] [2022-12-13 17:28:58,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:58,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:58,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 414 [2022-12-13 17:28:58,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:58,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:28:58,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 414 [2022-12-13 17:28:58,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:59,714 INFO L130 PetriNetUnfolder]: 15676/24207 cut-off events. [2022-12-13 17:28:59,714 INFO L131 PetriNetUnfolder]: For 7088/7088 co-relation queries the response was YES. [2022-12-13 17:28:59,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51385 conditions, 24207 events. 15676/24207 cut-off events. For 7088/7088 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 174619 event pairs, 10077 based on Foata normal form. 549/19336 useless extension candidates. Maximal degree in co-relation 51157. Up to 20911 conditions per place. [2022-12-13 17:28:59,835 INFO L137 encePairwiseOnDemand]: 410/414 looper letters, 71 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-13 17:28:59,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 377 flow [2022-12-13 17:28:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:28:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2022-12-13 17:28:59,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4969806763285024 [2022-12-13 17:28:59,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2022-12-13 17:28:59,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2022-12-13 17:28:59,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:28:59,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2022-12-13 17:28:59,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:59,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:59,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:59,841 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 153 flow. Second operand 4 states and 823 transitions. [2022-12-13 17:28:59,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 377 flow [2022-12-13 17:28:59,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 362 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 17:28:59,843 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 144 flow [2022-12-13 17:28:59,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2022-12-13 17:28:59,844 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -18 predicate places. [2022-12-13 17:28:59,844 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 144 flow [2022-12-13 17:28:59,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:59,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:28:59,844 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:59,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:28:59,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:28:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash 362291006, now seen corresponding path program 1 times [2022-12-13 17:28:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:59,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16673642] [2022-12-13 17:28:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:59,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:59,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:59,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16673642] [2022-12-13 17:28:59,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16673642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:59,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:59,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:59,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173064067] [2022-12-13 17:28:59,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:59,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:29:00,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 414 [2022-12-13 17:29:00,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:00,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:00,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 414 [2022-12-13 17:29:00,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:01,292 INFO L130 PetriNetUnfolder]: 12972/20054 cut-off events. [2022-12-13 17:29:01,292 INFO L131 PetriNetUnfolder]: For 2794/2794 co-relation queries the response was YES. [2022-12-13 17:29:01,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41332 conditions, 20054 events. 12972/20054 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 140576 event pairs, 8295 based on Foata normal form. 0/16452 useless extension candidates. Maximal degree in co-relation 41152. Up to 17109 conditions per place. [2022-12-13 17:29:01,369 INFO L137 encePairwiseOnDemand]: 408/414 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-12-13 17:29:01,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 354 flow [2022-12-13 17:29:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:29:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:29:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 783 transitions. [2022-12-13 17:29:01,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2022-12-13 17:29:01,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 783 transitions. [2022-12-13 17:29:01,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 783 transitions. [2022-12-13 17:29:01,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:01,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 783 transitions. [2022-12-13 17:29:01,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:01,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:01,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:01,375 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 144 flow. Second operand 4 states and 783 transitions. [2022-12-13 17:29:01,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 354 flow [2022-12-13 17:29:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:29:01,376 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 137 flow [2022-12-13 17:29:01,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2022-12-13 17:29:01,377 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -21 predicate places. [2022-12-13 17:29:01,377 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 137 flow [2022-12-13 17:29:01,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:01,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:01,377 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 17:29:01,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:29:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash 16772854, now seen corresponding path program 1 times [2022-12-13 17:29:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:01,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614899798] [2022-12-13 17:29:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:29:01,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:01,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614899798] [2022-12-13 17:29:01,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614899798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:01,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538891839] [2022-12-13 17:29:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:01,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:01,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:01,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:29:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:29:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:01,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:29:01,509 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 17:29:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:29:01,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:29:01,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538891839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:29:01,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:29:01,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-12-13 17:29:01,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013521301] [2022-12-13 17:29:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:29:01,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:29:01,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:29:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:29:01,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 414 [2022-12-13 17:29:01,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:01,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:01,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 414 [2022-12-13 17:29:01,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:02,659 INFO L130 PetriNetUnfolder]: 10916/17818 cut-off events. [2022-12-13 17:29:02,659 INFO L131 PetriNetUnfolder]: For 2366/2366 co-relation queries the response was YES. [2022-12-13 17:29:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36243 conditions, 17818 events. 10916/17818 cut-off events. For 2366/2366 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 133627 event pairs, 636 based on Foata normal form. 420/15601 useless extension candidates. Maximal degree in co-relation 31589. Up to 14480 conditions per place. [2022-12-13 17:29:02,738 INFO L137 encePairwiseOnDemand]: 410/414 looper letters, 62 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 17:29:02,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 323 flow [2022-12-13 17:29:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:29:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:29:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2022-12-13 17:29:02,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4969806763285024 [2022-12-13 17:29:02,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2022-12-13 17:29:02,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2022-12-13 17:29:02,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:02,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2022-12-13 17:29:02,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:02,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:02,744 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:02,744 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 137 flow. Second operand 4 states and 823 transitions. [2022-12-13 17:29:02,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 323 flow [2022-12-13 17:29:02,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:29:02,746 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 134 flow [2022-12-13 17:29:02,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2022-12-13 17:29:02,747 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -22 predicate places. [2022-12-13 17:29:02,747 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 134 flow [2022-12-13 17:29:02,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.75) internal successors, (767), 4 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:02,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:02,747 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:02,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:29:02,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:29:02,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:29:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 519952439, now seen corresponding path program 1 times [2022-12-13 17:29:02,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:02,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482768005] [2022-12-13 17:29:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:02,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:03,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:03,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482768005] [2022-12-13 17:29:03,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482768005] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:03,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051105420] [2022-12-13 17:29:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:03,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:03,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:03,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:29:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:29:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:03,137 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 17:29:03,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 17:29:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:29:03,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:29:03,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051105420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:29:03,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:29:03,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-13 17:29:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732580386] [2022-12-13 17:29:03,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:29:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:29:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:29:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:29:03,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 414 [2022-12-13 17:29:03,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 190.75) internal successors, (763), 4 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 17:29:03,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:03,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 414 [2022-12-13 17:29:03,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:04,076 INFO L130 PetriNetUnfolder]: 8860/14082 cut-off events. [2022-12-13 17:29:04,076 INFO L131 PetriNetUnfolder]: For 1979/1979 co-relation queries the response was YES. [2022-12-13 17:29:04,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29523 conditions, 14082 events. 8860/14082 cut-off events. For 1979/1979 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 98186 event pairs, 636 based on Foata normal form. 420/13365 useless extension candidates. Maximal degree in co-relation 25709. Up to 11584 conditions per place. [2022-12-13 17:29:04,134 INFO L137 encePairwiseOnDemand]: 408/414 looper letters, 60 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2022-12-13 17:29:04,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 311 flow [2022-12-13 17:29:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:29:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:29:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 819 transitions. [2022-12-13 17:29:04,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2022-12-13 17:29:04,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 819 transitions. [2022-12-13 17:29:04,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 819 transitions. [2022-12-13 17:29:04,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:04,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 819 transitions. [2022-12-13 17:29:04,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:04,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:04,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:04,142 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 134 flow. Second operand 4 states and 819 transitions. [2022-12-13 17:29:04,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 311 flow [2022-12-13 17:29:04,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:29:04,144 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 127 flow [2022-12-13 17:29:04,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2022-12-13 17:29:04,144 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -25 predicate places. [2022-12-13 17:29:04,144 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 127 flow [2022-12-13 17:29:04,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 190.75) internal successors, (763), 4 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 17:29:04,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:04,145 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:04,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:29:04,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:04,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:29:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:04,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1467051522, now seen corresponding path program 1 times [2022-12-13 17:29:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:04,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773895573] [2022-12-13 17:29:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:04,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:29:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773895573] [2022-12-13 17:29:04,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773895573] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508561021] [2022-12-13 17:29:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:04,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:04,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:04,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:29:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:29:04,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:29:04,491 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 17:29:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:29:04,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:29:04,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508561021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:29:04,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:29:04,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-12-13 17:29:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072412144] [2022-12-13 17:29:04,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:29:04,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:29:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:29:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:29:04,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 414 [2022-12-13 17:29:04,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:04,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:04,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 414 [2022-12-13 17:29:04,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:29:05,418 INFO L130 PetriNetUnfolder]: 7534/12295 cut-off events. [2022-12-13 17:29:05,418 INFO L131 PetriNetUnfolder]: For 1739/1739 co-relation queries the response was YES. [2022-12-13 17:29:05,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 12295 events. 7534/12295 cut-off events. For 1739/1739 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 84869 event pairs, 904 based on Foata normal form. 0/11198 useless extension candidates. Maximal degree in co-relation 22550. Up to 9330 conditions per place. [2022-12-13 17:29:05,468 INFO L137 encePairwiseOnDemand]: 410/414 looper letters, 52 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 17:29:05,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 276 flow [2022-12-13 17:29:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:29:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:29:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 814 transitions. [2022-12-13 17:29:05,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4915458937198068 [2022-12-13 17:29:05,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 814 transitions. [2022-12-13 17:29:05,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 814 transitions. [2022-12-13 17:29:05,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:05,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 814 transitions. [2022-12-13 17:29:05,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:05,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:05,473 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 414.0) internal successors, (2070), 5 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:05,473 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 127 flow. Second operand 4 states and 814 transitions. [2022-12-13 17:29:05,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 276 flow [2022-12-13 17:29:05,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:29:05,476 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 124 flow [2022-12-13 17:29:05,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2022-12-13 17:29:05,476 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -26 predicate places. [2022-12-13 17:29:05,476 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 124 flow [2022-12-13 17:29:05,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:05,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:05,477 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:29:05,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:29:05,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f271d08-3fd6-43d7-8b3b-d664b51b1971/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:05,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 17:29:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1776509005, now seen corresponding path program 1 times [2022-12-13 17:29:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933909743] [2022-12-13 17:29:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:29:05,694 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:29:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:29:05,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:29:05,704 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:29:05,704 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2022-12-13 17:29:05,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2022-12-13 17:29:05,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2022-12-13 17:29:05,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2022-12-13 17:29:05,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2022-12-13 17:29:05,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2022-12-13 17:29:05,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2022-12-13 17:29:05,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2022-12-13 17:29:05,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2022-12-13 17:29:05,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2022-12-13 17:29:05,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2022-12-13 17:29:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 17:29:05,708 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:05,708 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:29:05,708 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:29:05,734 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 17:29:05,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 270 transitions, 584 flow [2022-12-13 17:29:05,804 INFO L130 PetriNetUnfolder]: 81/722 cut-off events. [2022-12-13 17:29:05,804 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:29:05,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 722 events. 81/722 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3297 event pairs, 6 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 491. Up to 32 conditions per place. [2022-12-13 17:29:05,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 270 transitions, 584 flow [2022-12-13 17:29:05,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 270 transitions, 584 flow [2022-12-13 17:29:05,812 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:29:05,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 270 transitions, 584 flow [2022-12-13 17:29:05,813 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 270 transitions, 584 flow [2022-12-13 17:29:05,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 270 transitions, 584 flow [2022-12-13 17:29:05,882 INFO L130 PetriNetUnfolder]: 81/722 cut-off events. [2022-12-13 17:29:05,883 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 17:29:05,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 722 events. 81/722 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3297 event pairs, 6 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 491. Up to 32 conditions per place. [2022-12-13 17:29:05,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 40344 [2022-12-13 17:29:09,046 INFO L134 LiptonReduction]: Checked pairs total: 125860 [2022-12-13 17:29:09,046 INFO L136 LiptonReduction]: Total number of compositions: 226 [2022-12-13 17:29:09,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:29:09,047 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;@78db726c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:29:09,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2022-12-13 17:29:09,048 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 17:29:09,048 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:29:09,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:09,048 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:29:09,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-13 17:29:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash 61363, now seen corresponding path program 1 times [2022-12-13 17:29:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272392595] [2022-12-13 17:29:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:09,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272392595] [2022-12-13 17:29:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272392595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:29:09,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:29:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:29:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610052196] [2022-12-13 17:29:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:29:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:29:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:29:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:29:09,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 496 [2022-12-13 17:29:09,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 133 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:09,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:09,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 496 [2022-12-13 17:29:09,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand