./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.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_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/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_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/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_45c09c48-db51-416d-9ef4-108776624104/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 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 --- 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 22:21:43,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:21:43,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:21:43,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:21:43,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:21:43,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:21:43,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:21:43,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:21:43,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:21:43,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:21:43,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:21:43,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:21:43,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:21:43,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:21:43,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:21:43,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:21:43,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:21:43,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:21:43,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:21:43,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:21:43,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:21:43,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:21:43,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:21:43,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:21:43,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:21:43,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:21:43,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:21:43,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:21:43,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:21:43,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:21:43,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:21:43,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:21:43,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:21:43,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:21:43,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:21:43,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:21:43,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:21:43,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:21:43,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:21:43,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:21:43,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:21:43,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:21:43,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:21:43,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:21:43,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:21:43,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:21:43,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:21:43,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:21:43,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:21:43,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:21:43,997 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:21:43,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:21:43,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:21:43,997 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:21:43,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:21:43,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:21:43,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:21:43,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:21:43,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:21:43,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:21:44,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:21:44,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:21:44,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:21:44,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:21:44,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:21:44,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:21:44,009 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:21:44,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:21:44,009 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:21:44,009 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_45c09c48-db51-416d-9ef4-108776624104/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 [2022-12-13 22:21:44,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:21:44,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:21:44,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:21:44,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:21:44,199 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:21:44,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i [2022-12-13 22:21:46,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:21:46,933 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:21:46,934 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i [2022-12-13 22:21:46,945 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/data/28b53a331/d302b92f076546f0a711d26b288e4a5f/FLAG73f19715b [2022-12-13 22:21:46,956 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/data/28b53a331/d302b92f076546f0a711d26b288e4a5f [2022-12-13 22:21:46,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:21:46,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:21:46,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:21:46,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:21:46,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:21:46,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:21:46" (1/1) ... [2022-12-13 22:21:46,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104b0e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:46, skipping insertion in model container [2022-12-13 22:21:46,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:21:46" (1/1) ... [2022-12-13 22:21:46,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:21:47,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:21:47,385 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_45c09c48-db51-416d-9ef4-108776624104/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2022-12-13 22:21:47,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:21:47,420 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:21:47,456 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_45c09c48-db51-416d-9ef4-108776624104/sv-benchmarks/c/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2022-12-13 22:21:47,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:21:47,518 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:21:47,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47 WrapperNode [2022-12-13 22:21:47,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:21:47,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:21:47,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:21:47,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:21:47,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,567 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 201 [2022-12-13 22:21:47,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:21:47,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:21:47,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:21:47,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:21:47,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,594 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:21:47,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:21:47,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:21:47,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:21:47,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (1/1) ... [2022-12-13 22:21:47,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:21:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:21:47,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:21:47,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:21:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 22:21:47,664 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 22:21:47,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:21:47,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:21:47,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:21:47,665 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 22:21:47,785 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:21:47,787 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:21:48,085 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:21:48,093 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:21:48,093 INFO L300 CfgBuilder]: Removed 22 assume(true) statements. [2022-12-13 22:21:48,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:21:48 BoogieIcfgContainer [2022-12-13 22:21:48,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:21:48,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:21:48,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:21:48,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:21:48,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:21:46" (1/3) ... [2022-12-13 22:21:48,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c86340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:21:48, skipping insertion in model container [2022-12-13 22:21:48,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:21:47" (2/3) ... [2022-12-13 22:21:48,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c86340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:21:48, skipping insertion in model container [2022-12-13 22:21:48,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:21:48" (3/3) ... [2022-12-13 22:21:48,104 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2022-12-13 22:21:48,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:21:48,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-12-13 22:21:48,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:21:48,171 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 22:21:48,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 234 transitions, 476 flow [2022-12-13 22:21:48,274 INFO L130 PetriNetUnfolder]: 43/323 cut-off events. [2022-12-13 22:21:48,274 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:21:48,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 323 events. 43/323 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1218 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2022-12-13 22:21:48,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 234 transitions, 476 flow [2022-12-13 22:21:48,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 234 transitions, 476 flow [2022-12-13 22:21:48,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:21:48,323 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 234 transitions, 476 flow [2022-12-13 22:21:48,326 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 234 transitions, 476 flow [2022-12-13 22:21:48,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 234 transitions, 476 flow [2022-12-13 22:21:48,381 INFO L130 PetriNetUnfolder]: 43/323 cut-off events. [2022-12-13 22:21:48,381 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:21:48,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 323 events. 43/323 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1218 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2022-12-13 22:21:48,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 12920 [2022-12-13 22:21:54,567 INFO L134 LiptonReduction]: Checked pairs total: 29821 [2022-12-13 22:21:54,567 INFO L136 LiptonReduction]: Total number of compositions: 212 [2022-12-13 22:21:54,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:21:54,588 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;@cd4b6b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:21:54,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 22:21:54,591 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 22:21:54,592 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:21:54,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:21:54,592 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:21:54,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:21:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:21:54,597 INFO L85 PathProgramCache]: Analyzing trace with hash 28154, now seen corresponding path program 1 times [2022-12-13 22:21:54,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:21:54,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736025968] [2022-12-13 22:21:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:54,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:21:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:21:54,760 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 22:21:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:21:54,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736025968] [2022-12-13 22:21:54,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736025968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:21:54,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:21:54,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:21:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637398597] [2022-12-13 22:21:54,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:21:54,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:21:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:21:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:21:54,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:21:54,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 446 [2022-12-13 22:21:54,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:54,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:21:54,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 446 [2022-12-13 22:21:54,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:21:55,084 INFO L130 PetriNetUnfolder]: 640/1442 cut-off events. [2022-12-13 22:21:55,084 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:21:55,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2714 conditions, 1442 events. 640/1442 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9588 event pairs, 570 based on Foata normal form. 106/1040 useless extension candidates. Maximal degree in co-relation 2629. Up to 1223 conditions per place. [2022-12-13 22:21:55,092 INFO L137 encePairwiseOnDemand]: 416/446 looper letters, 69 selfloop transitions, 1 changer transitions 5/86 dead transitions. [2022-12-13 22:21:55,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 330 flow [2022-12-13 22:21:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:21:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:21:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2022-12-13 22:21:55,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5343796711509716 [2022-12-13 22:21:55,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2022-12-13 22:21:55,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2022-12-13 22:21:55,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:21:55,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2022-12-13 22:21:55,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,126 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 715 transitions. [2022-12-13 22:21:55,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 330 flow [2022-12-13 22:21:55,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:21:55,132 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 143 flow [2022-12-13 22:21:55,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-12-13 22:21:55,138 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-12-13 22:21:55,138 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 143 flow [2022-12-13 22:21:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:21:55,139 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:21:55,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:21:55,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:21:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:21:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash 28489, now seen corresponding path program 1 times [2022-12-13 22:21:55,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:21:55,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448783456] [2022-12-13 22:21:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:21:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:21:55,360 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 22:21:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:21:55,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448783456] [2022-12-13 22:21:55,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448783456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:21:55,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:21:55,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:21:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076621004] [2022-12-13 22:21:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:21:55,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:21:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:21:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:21:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:21:55,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 446 [2022-12-13 22:21:55,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:21:55,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 446 [2022-12-13 22:21:55,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:21:55,610 INFO L130 PetriNetUnfolder]: 591/1308 cut-off events. [2022-12-13 22:21:55,610 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 22:21:55,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2578 conditions, 1308 events. 591/1308 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8959 event pairs, 0 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 2505. Up to 1178 conditions per place. [2022-12-13 22:21:55,614 INFO L137 encePairwiseOnDemand]: 442/446 looper letters, 72 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 22:21:55,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 333 flow [2022-12-13 22:21:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:21:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:21:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2022-12-13 22:21:55,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.507473841554559 [2022-12-13 22:21:55,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2022-12-13 22:21:55,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2022-12-13 22:21:55,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:21:55,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2022-12-13 22:21:55,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,621 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 143 flow. Second operand 3 states and 679 transitions. [2022-12-13 22:21:55,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 333 flow [2022-12-13 22:21:55,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 329 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 22:21:55,624 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 149 flow [2022-12-13 22:21:55,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-12-13 22:21:55,625 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2022-12-13 22:21:55,625 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 149 flow [2022-12-13 22:21:55,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:21:55,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:21:55,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:21:55,626 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:21:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:21:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash 28487, now seen corresponding path program 1 times [2022-12-13 22:21:55,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:21:55,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595811466] [2022-12-13 22:21:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:21:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:21:55,668 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 22:21:55,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:21:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595811466] [2022-12-13 22:21:55,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595811466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:21:55,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:21:55,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:21:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803615355] [2022-12-13 22:21:55,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:21:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:21:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:21:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:21:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:21:55,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 446 [2022-12-13 22:21:55,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:21:55,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 446 [2022-12-13 22:21:55,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:21:55,866 INFO L130 PetriNetUnfolder]: 577/1263 cut-off events. [2022-12-13 22:21:55,866 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-12-13 22:21:55,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 1263 events. 577/1263 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8226 event pairs, 494 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 2462. Up to 1040 conditions per place. [2022-12-13 22:21:55,870 INFO L137 encePairwiseOnDemand]: 442/446 looper letters, 68 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-12-13 22:21:55,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 323 flow [2022-12-13 22:21:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:21:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:21:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2022-12-13 22:21:55,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4977578475336323 [2022-12-13 22:21:55,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2022-12-13 22:21:55,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2022-12-13 22:21:55,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:21:55,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2022-12-13 22:21:55,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,877 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 149 flow. Second operand 3 states and 666 transitions. [2022-12-13 22:21:55,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 323 flow [2022-12-13 22:21:55,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:21:55,879 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 145 flow [2022-12-13 22:21:55,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2022-12-13 22:21:55,880 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2022-12-13 22:21:55,880 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 145 flow [2022-12-13 22:21:55,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:55,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:21:55,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:21:55,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:21:55,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:21:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:21:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash 849337318, now seen corresponding path program 1 times [2022-12-13 22:21:55,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:21:55,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894510672] [2022-12-13 22:21:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:21:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:21:56,025 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 22:21:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:21:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894510672] [2022-12-13 22:21:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894510672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:21:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418906922] [2022-12-13 22:21:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:56,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:21:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:21:56,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:21:56,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:21:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:21:56,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:21:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:21:56,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 114 [2022-12-13 22:21:56,225 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 108 [2022-12-13 22:21:56,284 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 22:21:56,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:21:56,322 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 22:21:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418906922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:21:56,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:21:56,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 22:21:56,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088590358] [2022-12-13 22:21:56,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:21:56,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:21:56,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:21:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:21:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:21:56,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 446 [2022-12-13 22:21:56,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 199.71428571428572) internal successors, (1398), 7 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:56,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:21:56,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 446 [2022-12-13 22:21:56,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:21:56,626 INFO L130 PetriNetUnfolder]: 39/127 cut-off events. [2022-12-13 22:21:56,626 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:21:56,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 127 events. 39/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 532 event pairs, 0 based on Foata normal form. 20/128 useless extension candidates. Maximal degree in co-relation 267. Up to 78 conditions per place. [2022-12-13 22:21:56,627 INFO L137 encePairwiseOnDemand]: 442/446 looper letters, 41 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2022-12-13 22:21:56,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 197 flow [2022-12-13 22:21:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:21:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:21:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2022-12-13 22:21:56,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46917040358744394 [2022-12-13 22:21:56,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2022-12-13 22:21:56,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2022-12-13 22:21:56,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:21:56,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2022-12-13 22:21:56,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 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 22:21:56,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:56,638 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 446.0) internal successors, (2230), 5 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:56,638 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 145 flow. Second operand 4 states and 837 transitions. [2022-12-13 22:21:56,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 197 flow [2022-12-13 22:21:56,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:21:56,639 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 72 flow [2022-12-13 22:21:56,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2022-12-13 22:21:56,640 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -34 predicate places. [2022-12-13 22:21:56,640 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 72 flow [2022-12-13 22:21:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.71428571428572) internal successors, (1398), 7 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:56,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:21:56,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:21:56,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:21:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:21:56,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:21:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:21:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash 559607182, now seen corresponding path program 1 times [2022-12-13 22:21:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:21:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797666078] [2022-12-13 22:21:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:21:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:21:56,969 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 22:21:56,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:21:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797666078] [2022-12-13 22:21:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797666078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:21:56,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:21:56,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:21:56,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410019970] [2022-12-13 22:21:56,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:21:56,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:21:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:21:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:21:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:21:57,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 446 [2022-12-13 22:21:57,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:57,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:21:57,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 446 [2022-12-13 22:21:57,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:21:57,070 INFO L130 PetriNetUnfolder]: 35/108 cut-off events. [2022-12-13 22:21:57,070 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 22:21:57,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 108 events. 35/108 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 337 event pairs, 32 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 212. Up to 85 conditions per place. [2022-12-13 22:21:57,071 INFO L137 encePairwiseOnDemand]: 442/446 looper letters, 19 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 22:21:57,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 106 flow [2022-12-13 22:21:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:21:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:21:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-12-13 22:21:57,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4633781763826607 [2022-12-13 22:21:57,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-12-13 22:21:57,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-12-13 22:21:57,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:21:57,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-12-13 22:21:57,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:57,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:57,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 446.0) internal successors, (1784), 4 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:57,079 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 72 flow. Second operand 3 states and 620 transitions. [2022-12-13 22:21:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 106 flow [2022-12-13 22:21:57,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 103 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:21:57,080 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 65 flow [2022-12-13 22:21:57,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=446, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2022-12-13 22:21:57,081 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -37 predicate places. [2022-12-13 22:21:57,081 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 65 flow [2022-12-13 22:21:57,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:21:57,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:21:57,082 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 22:21:57,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:21:57,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:21:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:21:57,083 INFO L85 PathProgramCache]: Analyzing trace with hash 559653700, now seen corresponding path program 1 times [2022-12-13 22:21:57,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:21:57,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110694566] [2022-12-13 22:21:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:21:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:21:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:21:57,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:21:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:21:57,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:21:57,125 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:21:57,126 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-12-13 22:21:57,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (37 of 39 remaining) [2022-12-13 22:21:57,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-12-13 22:21:57,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-12-13 22:21:57,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-12-13 22:21:57,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-12-13 22:21:57,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-12-13 22:21:57,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-12-13 22:21:57,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-12-13 22:21:57,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-12-13 22:21:57,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-12-13 22:21:57,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-12-13 22:21:57,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-12-13 22:21:57,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-12-13 22:21:57,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-12-13 22:21:57,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-12-13 22:21:57,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-12-13 22:21:57,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-12-13 22:21:57,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-12-13 22:21:57,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-12-13 22:21:57,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-12-13 22:21:57,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 22:21:57,134 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 22:21:57,136 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:21:57,136 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 22:21:57,164 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 22:21:57,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 304 transitions, 626 flow [2022-12-13 22:21:57,233 INFO L130 PetriNetUnfolder]: 72/512 cut-off events. [2022-12-13 22:21:57,233 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 22:21:57,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 512 events. 72/512 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2253 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 325. Up to 12 conditions per place. [2022-12-13 22:21:57,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 304 transitions, 626 flow [2022-12-13 22:21:57,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 304 transitions, 626 flow [2022-12-13 22:21:57,244 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:21:57,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 304 transitions, 626 flow [2022-12-13 22:21:57,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 304 transitions, 626 flow [2022-12-13 22:21:57,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 304 transitions, 626 flow [2022-12-13 22:21:57,307 INFO L130 PetriNetUnfolder]: 72/512 cut-off events. [2022-12-13 22:21:57,307 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 22:21:57,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 512 events. 72/512 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2253 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 325. Up to 12 conditions per place. [2022-12-13 22:21:57,330 INFO L119 LiptonReduction]: Number of co-enabled transitions 36584 [2022-12-13 22:22:03,304 INFO L134 LiptonReduction]: Checked pairs total: 100098 [2022-12-13 22:22:03,304 INFO L136 LiptonReduction]: Total number of compositions: 263 [2022-12-13 22:22:03,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:22:03,305 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;@cd4b6b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:22:03,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-12-13 22:22:03,307 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 22:22:03,307 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:22:03,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:03,307 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:22:03,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 48448, now seen corresponding path program 1 times [2022-12-13 22:22:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:03,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305915033] [2022-12-13 22:22:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:03,319 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 22:22:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305915033] [2022-12-13 22:22:03,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305915033] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:03,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:03,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:22:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6691039] [2022-12-13 22:22:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:03,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 567 [2022-12-13 22:22:03,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 138 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 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 22:22:03,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:03,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 567 [2022-12-13 22:22:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:06,440 INFO L130 PetriNetUnfolder]: 28682/47574 cut-off events. [2022-12-13 22:22:06,440 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-12-13 22:22:06,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90091 conditions, 47574 events. 28682/47574 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 2086. Compared 412623 event pairs, 26380 based on Foata normal form. 4376/35368 useless extension candidates. Maximal degree in co-relation 36657. Up to 41018 conditions per place. [2022-12-13 22:22:06,652 INFO L137 encePairwiseOnDemand]: 524/567 looper letters, 116 selfloop transitions, 1 changer transitions 2/138 dead transitions. [2022-12-13 22:22:06,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 532 flow [2022-12-13 22:22:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2022-12-13 22:22:06,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5602586713697825 [2022-12-13 22:22:06,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2022-12-13 22:22:06,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2022-12-13 22:22:06,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:06,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2022-12-13 22:22:06,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:06,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:06,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:06,664 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 294 flow. Second operand 3 states and 953 transitions. [2022-12-13 22:22:06,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 532 flow [2022-12-13 22:22:06,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:22:06,669 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 215 flow [2022-12-13 22:22:06,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2022-12-13 22:22:06,670 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -6 predicate places. [2022-12-13 22:22:06,670 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 215 flow [2022-12-13 22:22:06,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 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 22:22:06,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:06,671 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:22:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:22:06,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash 48887, now seen corresponding path program 1 times [2022-12-13 22:22:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:06,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491792809] [2022-12-13 22:22:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:06,728 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 22:22:06,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:06,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491792809] [2022-12-13 22:22:06,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491792809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:06,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:06,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:22:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643851028] [2022-12-13 22:22:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:06,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 567 [2022-12-13 22:22:06,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:06,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:06,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 567 [2022-12-13 22:22:06,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:09,659 INFO L130 PetriNetUnfolder]: 25912/43353 cut-off events. [2022-12-13 22:22:09,659 INFO L131 PetriNetUnfolder]: For 626/626 co-relation queries the response was YES. [2022-12-13 22:22:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82778 conditions, 43353 events. 25912/43353 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 1968. Compared 378607 event pairs, 22880 based on Foata normal form. 0/29170 useless extension candidates. Maximal degree in co-relation 79554. Up to 35590 conditions per place. [2022-12-13 22:22:09,853 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 112 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2022-12-13 22:22:09,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 134 transitions, 519 flow [2022-12-13 22:22:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 878 transitions. [2022-12-13 22:22:09,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5161669606114051 [2022-12-13 22:22:09,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 878 transitions. [2022-12-13 22:22:09,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 878 transitions. [2022-12-13 22:22:09,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:09,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 878 transitions. [2022-12-13 22:22:09,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:09,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:09,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:09,861 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 215 flow. Second operand 3 states and 878 transitions. [2022-12-13 22:22:09,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 134 transitions, 519 flow [2022-12-13 22:22:10,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 515 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:10,057 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 211 flow [2022-12-13 22:22:10,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-12-13 22:22:10,057 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -8 predicate places. [2022-12-13 22:22:10,057 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 211 flow [2022-12-13 22:22:10,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:10,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:10,058 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:22:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 22:22:10,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash 48889, now seen corresponding path program 1 times [2022-12-13 22:22:10,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:10,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659912384] [2022-12-13 22:22:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:10,108 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 22:22:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659912384] [2022-12-13 22:22:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659912384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:10,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:22:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151081529] [2022-12-13 22:22:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:10,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 567 [2022-12-13 22:22:10,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:10,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:10,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 567 [2022-12-13 22:22:10,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:12,442 INFO L130 PetriNetUnfolder]: 25713/42382 cut-off events. [2022-12-13 22:22:12,442 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-12-13 22:22:12,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81869 conditions, 42382 events. 25713/42382 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 361332 event pairs, 11880 based on Foata normal form. 0/28739 useless extension candidates. Maximal degree in co-relation 74974. Up to 38340 conditions per place. [2022-12-13 22:22:12,580 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 94 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2022-12-13 22:22:12,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 447 flow [2022-12-13 22:22:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2022-12-13 22:22:12,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5108759553203998 [2022-12-13 22:22:12,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2022-12-13 22:22:12,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2022-12-13 22:22:12,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:12,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2022-12-13 22:22:12,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:12,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:12,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:12,587 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 211 flow. Second operand 3 states and 869 transitions. [2022-12-13 22:22:12,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 447 flow [2022-12-13 22:22:12,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 116 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:12,612 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 221 flow [2022-12-13 22:22:12,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2022-12-13 22:22:12,613 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -7 predicate places. [2022-12-13 22:22:12,613 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 221 flow [2022-12-13 22:22:12,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:12,613 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:12,613 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:22:12,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 22:22:12,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2057391230, now seen corresponding path program 1 times [2022-12-13 22:22:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:12,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172520676] [2022-12-13 22:22:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:12,716 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 22:22:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172520676] [2022-12-13 22:22:12,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172520676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:12,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:12,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:22:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997668254] [2022-12-13 22:22:12,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:12,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:12,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:22:12,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 567 [2022-12-13 22:22:12,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:12,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:12,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 567 [2022-12-13 22:22:12,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:15,000 INFO L130 PetriNetUnfolder]: 19238/31930 cut-off events. [2022-12-13 22:22:15,000 INFO L131 PetriNetUnfolder]: For 791/791 co-relation queries the response was YES. [2022-12-13 22:22:15,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61786 conditions, 31930 events. 19238/31930 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 264899 event pairs, 16745 based on Foata normal form. 1566/23981 useless extension candidates. Maximal degree in co-relation 61658. Up to 26314 conditions per place. [2022-12-13 22:22:15,148 INFO L137 encePairwiseOnDemand]: 559/567 looper letters, 101 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2022-12-13 22:22:15,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 483 flow [2022-12-13 22:22:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1106 transitions. [2022-12-13 22:22:15,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2022-12-13 22:22:15,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1106 transitions. [2022-12-13 22:22:15,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1106 transitions. [2022-12-13 22:22:15,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:15,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1106 transitions. [2022-12-13 22:22:15,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 276.5) internal successors, (1106), 4 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:15,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:15,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:15,163 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 221 flow. Second operand 4 states and 1106 transitions. [2022-12-13 22:22:15,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 483 flow [2022-12-13 22:22:15,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:15,168 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 211 flow [2022-12-13 22:22:15,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2022-12-13 22:22:15,169 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -11 predicate places. [2022-12-13 22:22:15,169 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 211 flow [2022-12-13 22:22:15,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:15,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:15,170 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:22:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 22:22:15,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2057727404, now seen corresponding path program 1 times [2022-12-13 22:22:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:15,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801178503] [2022-12-13 22:22:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:15,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801178503] [2022-12-13 22:22:15,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801178503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:15,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:15,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:22:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176159309] [2022-12-13 22:22:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:15,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:22:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:22:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:22:15,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 567 [2022-12-13 22:22:15,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:15,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:15,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 567 [2022-12-13 22:22:15,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:17,305 INFO L130 PetriNetUnfolder]: 18220/30512 cut-off events. [2022-12-13 22:22:17,305 INFO L131 PetriNetUnfolder]: For 902/902 co-relation queries the response was YES. [2022-12-13 22:22:17,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59301 conditions, 30512 events. 18220/30512 cut-off events. For 902/902 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 254049 event pairs, 7718 based on Foata normal form. 0/21934 useless extension candidates. Maximal degree in co-relation 54180. Up to 25211 conditions per place. [2022-12-13 22:22:17,420 INFO L137 encePairwiseOnDemand]: 563/567 looper letters, 117 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2022-12-13 22:22:17,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 551 flow [2022-12-13 22:22:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2022-12-13 22:22:17,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5013227513227513 [2022-12-13 22:22:17,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2022-12-13 22:22:17,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2022-12-13 22:22:17,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:17,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2022-12-13 22:22:17,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:17,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:17,427 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:17,428 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 211 flow. Second operand 4 states and 1137 transitions. [2022-12-13 22:22:17,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 551 flow [2022-12-13 22:22:17,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 548 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:17,445 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 210 flow [2022-12-13 22:22:17,446 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2022-12-13 22:22:17,446 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -11 predicate places. [2022-12-13 22:22:17,446 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 210 flow [2022-12-13 22:22:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:17,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:17,447 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:17,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 22:22:17,447 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash 645377255, now seen corresponding path program 1 times [2022-12-13 22:22:17,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:17,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165835129] [2022-12-13 22:22:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:17,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:17,495 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 22:22:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165835129] [2022-12-13 22:22:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165835129] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:17,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:17,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:22:17,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830735371] [2022-12-13 22:22:17,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:17,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:22:17,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 567 [2022-12-13 22:22:17,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:17,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:17,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 567 [2022-12-13 22:22:17,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:19,465 INFO L130 PetriNetUnfolder]: 15029/24561 cut-off events. [2022-12-13 22:22:19,465 INFO L131 PetriNetUnfolder]: For 790/790 co-relation queries the response was YES. [2022-12-13 22:22:19,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49152 conditions, 24561 events. 15029/24561 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 186276 event pairs, 12532 based on Foata normal form. 0/19967 useless extension candidates. Maximal degree in co-relation 39788. Up to 20698 conditions per place. [2022-12-13 22:22:19,559 INFO L137 encePairwiseOnDemand]: 543/567 looper letters, 89 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2022-12-13 22:22:19,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 477 flow [2022-12-13 22:22:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 814 transitions. [2022-12-13 22:22:19,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47854203409758966 [2022-12-13 22:22:19,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 814 transitions. [2022-12-13 22:22:19,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 814 transitions. [2022-12-13 22:22:19,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:19,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 814 transitions. [2022-12-13 22:22:19,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 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 22:22:19,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:19,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:19,565 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 210 flow. Second operand 3 states and 814 transitions. [2022-12-13 22:22:19,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 477 flow [2022-12-13 22:22:19,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 471 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:22:19,575 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 328 flow [2022-12-13 22:22:19,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2022-12-13 22:22:19,576 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -10 predicate places. [2022-12-13 22:22:19,576 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 328 flow [2022-12-13 22:22:19,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:19,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:19,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:19,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 22:22:19,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 645377617, now seen corresponding path program 1 times [2022-12-13 22:22:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:19,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809711536] [2022-12-13 22:22:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:19,665 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 22:22:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:19,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809711536] [2022-12-13 22:22:19,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809711536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:19,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:19,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:22:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32343734] [2022-12-13 22:22:19,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:19,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:22:19,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2022-12-13 22:22:19,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:19,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:19,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2022-12-13 22:22:19,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:21,655 INFO L130 PetriNetUnfolder]: 17649/30476 cut-off events. [2022-12-13 22:22:21,656 INFO L131 PetriNetUnfolder]: For 5615/5772 co-relation queries the response was YES. [2022-12-13 22:22:21,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69112 conditions, 30476 events. 17649/30476 cut-off events. For 5615/5772 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 258185 event pairs, 5567 based on Foata normal form. 0/26015 useless extension candidates. Maximal degree in co-relation 53933. Up to 18038 conditions per place. [2022-12-13 22:22:21,775 INFO L137 encePairwiseOnDemand]: 554/567 looper letters, 171 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2022-12-13 22:22:21,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 212 transitions, 1050 flow [2022-12-13 22:22:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1173 transitions. [2022-12-13 22:22:21,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5171957671957672 [2022-12-13 22:22:21,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1173 transitions. [2022-12-13 22:22:21,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1173 transitions. [2022-12-13 22:22:21,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:21,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1173 transitions. [2022-12-13 22:22:21,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:21,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:21,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 567.0) internal successors, (2835), 5 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:21,784 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 328 flow. Second operand 4 states and 1173 transitions. [2022-12-13 22:22:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 212 transitions, 1050 flow [2022-12-13 22:22:21,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 212 transitions, 1000 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:21,814 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 493 flow [2022-12-13 22:22:21,814 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=493, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2022-12-13 22:22:21,814 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -6 predicate places. [2022-12-13 22:22:21,815 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 493 flow [2022-12-13 22:22:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:21,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:21,816 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:21,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 22:22:21,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1791019686, now seen corresponding path program 1 times [2022-12-13 22:22:21,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622181170] [2022-12-13 22:22:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:21,850 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 22:22:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622181170] [2022-12-13 22:22:21,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622181170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587104159] [2022-12-13 22:22:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:21,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:22:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:21,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:22:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:21,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:21,967 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 22:22:21,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587104159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:21,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:21,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 22:22:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604535941] [2022-12-13 22:22:21,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:21,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:22:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:22:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:22:21,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 567 [2022-12-13 22:22:21,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:21,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:21,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 567 [2022-12-13 22:22:21,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:22,212 INFO L130 PetriNetUnfolder]: 1276/2449 cut-off events. [2022-12-13 22:22:22,212 INFO L131 PetriNetUnfolder]: For 1857/1857 co-relation queries the response was YES. [2022-12-13 22:22:22,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6555 conditions, 2449 events. 1276/2449 cut-off events. For 1857/1857 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15586 event pairs, 169 based on Foata normal form. 282/2636 useless extension candidates. Maximal degree in co-relation 2362. Up to 1523 conditions per place. [2022-12-13 22:22:22,223 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 88 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2022-12-13 22:22:22,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 596 flow [2022-12-13 22:22:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:22:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:22:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1365 transitions. [2022-12-13 22:22:22,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2022-12-13 22:22:22,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1365 transitions. [2022-12-13 22:22:22,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1365 transitions. [2022-12-13 22:22:22,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:22,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1365 transitions. [2022-12-13 22:22:22,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:22,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:22,229 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 567.0) internal successors, (3402), 6 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:22,230 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 493 flow. Second operand 5 states and 1365 transitions. [2022-12-13 22:22:22,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 596 flow [2022-12-13 22:22:22,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 102 transitions, 593 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:22,232 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 217 flow [2022-12-13 22:22:22,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2022-12-13 22:22:22,232 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -45 predicate places. [2022-12-13 22:22:22,232 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 217 flow [2022-12-13 22:22:22,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 259.0) internal successors, (1554), 6 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:22,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:22,233 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 22:22:22,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:22:22,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c09c48-db51-416d-9ef4-108776624104/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 22:22:22,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:22:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash -513613340, now seen corresponding path program 1 times [2022-12-13 22:22:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073048380] [2022-12-13 22:22:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:22:22,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:22:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:22:22,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:22:22,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:22:22,498 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-12-13 22:22:22,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (48 of 50 remaining) [2022-12-13 22:22:22,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2022-12-13 22:22:22,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-12-13 22:22:22,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-12-13 22:22:22,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-12-13 22:22:22,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-12-13 22:22:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-12-13 22:22:22,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 22:22:22,503 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:22,504 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:22:22,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 22:22:22,526 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 22:22:22,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 374 transitions, 778 flow [2022-12-13 22:22:22,600 INFO L130 PetriNetUnfolder]: 106/744 cut-off events. [2022-12-13 22:22:22,600 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 22:22:22,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 744 events. 106/744 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3571 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 520. Up to 16 conditions per place. [2022-12-13 22:22:22,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 374 transitions, 778 flow [2022-12-13 22:22:22,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 374 transitions, 778 flow [2022-12-13 22:22:22,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:22:22,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 374 transitions, 778 flow [2022-12-13 22:22:22,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 374 transitions, 778 flow [2022-12-13 22:22:22,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 374 transitions, 778 flow [2022-12-13 22:22:22,683 INFO L130 PetriNetUnfolder]: 106/744 cut-off events. [2022-12-13 22:22:22,683 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 22:22:22,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 744 events. 106/744 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3571 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 520. Up to 16 conditions per place. [2022-12-13 22:22:22,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 69360 [2022-12-13 22:22:29,474 INFO L134 LiptonReduction]: Checked pairs total: 202214 [2022-12-13 22:22:29,474 INFO L136 LiptonReduction]: Total number of compositions: 323 [2022-12-13 22:22:29,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:22:29,475 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;@cd4b6b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:22:29,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-12-13 22:22:29,477 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 22:22:29,477 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:22:29,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:29,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:22:29,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:22:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 72831, now seen corresponding path program 1 times [2022-12-13 22:22:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:29,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371443707] [2022-12-13 22:22:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:29,487 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 22:22:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371443707] [2022-12-13 22:22:29,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371443707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:29,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:29,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:22:29,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571951300] [2022-12-13 22:22:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:29,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:29,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 697 [2022-12-13 22:22:29,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:29,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:29,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 697 [2022-12-13 22:22:29,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:05,013 INFO L130 PetriNetUnfolder]: 958739/1373270 cut-off events. [2022-12-13 22:24:05,013 INFO L131 PetriNetUnfolder]: For 6729/6729 co-relation queries the response was YES. [2022-12-13 22:24:06,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2647622 conditions, 1373270 events. 958739/1373270 cut-off events. For 6729/6729 co-relation queries the response was YES. Maximal size of possible extension queue 43487. Compared 13370314 event pairs, 891482 based on Foata normal form. 127716/1034835 useless extension candidates. Maximal degree in co-relation 186775. Up to 1228358 conditions per place. [2022-12-13 22:24:12,168 INFO L137 encePairwiseOnDemand]: 641/697 looper letters, 160 selfloop transitions, 1 changer transitions 2/187 dead transitions. [2022-12-13 22:24:12,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 730 flow [2022-12-13 22:24:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:24:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:24:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1191 transitions. [2022-12-13 22:24:12,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.569583931133429 [2022-12-13 22:24:12,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1191 transitions. [2022-12-13 22:24:12,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1191 transitions. [2022-12-13 22:24:12,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:12,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1191 transitions. [2022-12-13 22:24:12,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:12,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:12,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:12,175 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 388 flow. Second operand 3 states and 1191 transitions. [2022-12-13 22:24:12,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 730 flow [2022-12-13 22:24:12,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 187 transitions, 730 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:24:12,187 INFO L231 Difference]: Finished difference. Result has 127 places, 124 transitions, 283 flow [2022-12-13 22:24:12,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=127, PETRI_TRANSITIONS=124} [2022-12-13 22:24:12,188 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -8 predicate places. [2022-12-13 22:24:12,188 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 124 transitions, 283 flow [2022-12-13 22:24:12,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:12,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:12,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:24:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 22:24:12,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:24:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash 73419, now seen corresponding path program 1 times [2022-12-13 22:24:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:24:12,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920594903] [2022-12-13 22:24:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:12,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:24:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:12,238 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 22:24:12,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:24:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920594903] [2022-12-13 22:24:12,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920594903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:24:12,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:24:12,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:24:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965775026] [2022-12-13 22:24:12,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:24:12,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:24:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:24:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:24:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:24:12,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 697 [2022-12-13 22:24:12,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 124 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:12,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:12,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 697 [2022-12-13 22:24:12,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:38,734 INFO L130 PetriNetUnfolder]: 927535/1328853 cut-off events. [2022-12-13 22:25:38,734 INFO L131 PetriNetUnfolder]: For 36640/45326 co-relation queries the response was YES. [2022-12-13 22:25:40,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574684 conditions, 1328853 events. 927535/1328853 cut-off events. For 36640/45326 co-relation queries the response was YES. Maximal size of possible extension queue 41808. Compared 12870100 event pairs, 586541 based on Foata normal form. 0/884488 useless extension candidates. Maximal degree in co-relation 2477218. Up to 1228788 conditions per place. [2022-12-13 22:25:45,416 INFO L137 encePairwiseOnDemand]: 693/697 looper letters, 121 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2022-12-13 22:25:45,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 148 transitions, 577 flow [2022-12-13 22:25:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-12-13 22:25:45,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5088474414155906 [2022-12-13 22:25:45,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-12-13 22:25:45,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-12-13 22:25:45,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:45,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-12-13 22:25:45,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,422 INFO L175 Difference]: Start difference. First operand has 127 places, 124 transitions, 283 flow. Second operand 3 states and 1064 transitions. [2022-12-13 22:25:45,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 148 transitions, 577 flow [2022-12-13 22:25:59,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 148 transitions, 573 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:59,179 INFO L231 Difference]: Finished difference. Result has 128 places, 125 transitions, 293 flow [2022-12-13 22:25:59,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=128, PETRI_TRANSITIONS=125} [2022-12-13 22:25:59,179 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, -7 predicate places. [2022-12-13 22:25:59,179 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 125 transitions, 293 flow [2022-12-13 22:25:59,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:59,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:59,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:25:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 22:25:59,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:25:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash 73418, now seen corresponding path program 1 times [2022-12-13 22:25:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:59,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515285517] [2022-12-13 22:25:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:59,198 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 22:25:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:59,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515285517] [2022-12-13 22:25:59,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515285517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:59,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:59,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:25:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598075155] [2022-12-13 22:25:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:59,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:25:59,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:25:59,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:25:59,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 697 [2022-12-13 22:25:59,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 125 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:59,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:59,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 697 [2022-12-13 22:25:59,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand