./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/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_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/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_066fae0b-7a11-4275-9426-d61090597a53/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 a812aad62102b8bb20af57f89ce6dbf7fb9ee1fa63f6f8ecf164ccf61d0713cb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:27:10,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:27:10,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:27:10,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:27:10,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:27:10,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:27:10,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:27:10,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:27:10,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:27:10,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:27:10,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:27:10,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:27:10,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:27:10,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:27:10,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:27:10,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:27:10,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:27:10,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:27:10,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:27:10,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:27:10,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:27:10,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:27:10,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:27:10,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:27:10,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:27:10,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:27:10,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:27:10,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:27:10,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:27:10,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:27:10,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:27:10,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:27:10,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:27:10,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:27:10,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:27:10,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:27:10,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:27:10,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:27:10,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:27:10,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:27:10,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:27:10,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:27:10,086 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:27:10,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:27:10,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:27:10,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:27:10,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:27:10,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:27:10,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:27:10,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:27:10,099 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:27:10,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:27:10,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:27:10,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:27:10,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:27:10,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:27:10,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:27:10,100 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:27:10,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:27:10,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:27:10,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:27:10,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:27:10,101 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:27:10,101 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:27:10,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:27:10,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:27:10,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:27:10,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:27:10,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:27:10,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:27:10,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:27:10,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:27:10,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:27:10,103 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:27:10,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:27:10,103 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:27:10,104 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_066fae0b-7a11-4275-9426-d61090597a53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a812aad62102b8bb20af57f89ce6dbf7fb9ee1fa63f6f8ecf164ccf61d0713cb [2022-12-13 13:27:10,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:27:10,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:27:10,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:27:10,316 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:27:10,316 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:27:10,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i [2022-12-13 13:27:12,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:27:13,144 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:27:13,145 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/sv-benchmarks/c/goblint-regression/06-symbeq_08-tricky_address3.i [2022-12-13 13:27:13,157 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/data/44ea80eb9/a209e9ac60664e949d09da193006112f/FLAG9ed9f250d [2022-12-13 13:27:13,171 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/data/44ea80eb9/a209e9ac60664e949d09da193006112f [2022-12-13 13:27:13,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:27:13,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:27:13,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:27:13,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:27:13,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:27:13,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608d4b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13, skipping insertion in model container [2022-12-13 13:27:13,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:27:13,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:27:13,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:27:13,561 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:27:13,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:27:13,647 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:27:13,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13 WrapperNode [2022-12-13 13:27:13,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:27:13,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:27:13,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:27:13,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:27:13,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,691 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-12-13 13:27:13,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:27:13,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:27:13,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:27:13,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:27:13,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,717 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:27:13,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:27:13,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:27:13,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:27:13,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (1/1) ... [2022-12-13 13:27:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:27:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:27:13,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:27:13,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:27:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 13:27:13,787 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 13:27:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:27:13,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:27:13,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:27:13,901 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:27:13,903 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:27:14,052 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:27:14,058 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:27:14,059 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 13:27:14,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:27:14 BoogieIcfgContainer [2022-12-13 13:27:14,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:27:14,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:27:14,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:27:14,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:27:14,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:27:13" (1/3) ... [2022-12-13 13:27:14,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebda550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:27:14, skipping insertion in model container [2022-12-13 13:27:14,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:27:13" (2/3) ... [2022-12-13 13:27:14,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebda550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:27:14, skipping insertion in model container [2022-12-13 13:27:14,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:27:14" (3/3) ... [2022-12-13 13:27:14,069 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_08-tricky_address3.i [2022-12-13 13:27:14,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:27:14,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-12-13 13:27:14,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:27:14,150 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:27:14,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 92 transitions, 189 flow [2022-12-13 13:27:14,226 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-12-13 13:27:14,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:27:14,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 91 events. 4/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-12-13 13:27:14,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 92 transitions, 189 flow [2022-12-13 13:27:14,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 185 flow [2022-12-13 13:27:14,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:27:14,246 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 185 flow [2022-12-13 13:27:14,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 185 flow [2022-12-13 13:27:14,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 185 flow [2022-12-13 13:27:14,271 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-12-13 13:27:14,271 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:27:14,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 91 events. 4/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-12-13 13:27:14,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 1380 [2022-12-13 13:27:16,156 INFO L134 LiptonReduction]: Checked pairs total: 2409 [2022-12-13 13:27:16,157 INFO L136 LiptonReduction]: Total number of compositions: 100 [2022-12-13 13:27:16,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:27:16,175 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;@16020cf8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:27:16,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-12-13 13:27:16,177 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 13:27:16,177 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:27:16,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:16,178 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:27:16,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash 11209, now seen corresponding path program 1 times [2022-12-13 13:27:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:16,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347389725] [2022-12-13 13:27:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:16,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:16,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347389725] [2022-12-13 13:27:16,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347389725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:16,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:16,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:27:16,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432475365] [2022-12-13 13:27:16,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:27:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:27:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:27:16,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 192 [2022-12-13 13:27:16,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 51 flow. Second operand has 2 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:16,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 192 [2022-12-13 13:27:16,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:16,387 INFO L130 PetriNetUnfolder]: 57/131 cut-off events. [2022-12-13 13:27:16,387 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:27:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 131 events. 57/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 452 event pairs, 56 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 254. Up to 132 conditions per place. [2022-12-13 13:27:16,389 INFO L137 encePairwiseOnDemand]: 187/192 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2022-12-13 13:27:16,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 79 flow [2022-12-13 13:27:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:27:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:27:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 200 transitions. [2022-12-13 13:27:16,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2022-12-13 13:27:16,401 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 200 transitions. [2022-12-13 13:27:16,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 200 transitions. [2022-12-13 13:27:16,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:16,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 200 transitions. [2022-12-13 13:27:16,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.0) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,411 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,413 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 51 flow. Second operand 2 states and 200 transitions. [2022-12-13 13:27:16,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 79 flow [2022-12-13 13:27:16,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:27:16,416 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 40 flow [2022-12-13 13:27:16,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2022-12-13 13:27:16,420 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2022-12-13 13:27:16,421 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 40 flow [2022-12-13 13:27:16,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:16,421 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:27:16,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:27:16,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash 10780334, now seen corresponding path program 1 times [2022-12-13 13:27:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:16,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930705826] [2022-12-13 13:27:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:16,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930705826] [2022-12-13 13:27:16,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930705826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:16,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:16,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:27:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766312226] [2022-12-13 13:27:16,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:16,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:27:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:27:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:27:16,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2022-12-13 13:27:16,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:16,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2022-12-13 13:27:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:16,571 INFO L130 PetriNetUnfolder]: 57/132 cut-off events. [2022-12-13 13:27:16,571 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:27:16,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 132 events. 57/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 448 event pairs, 56 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 266. Up to 132 conditions per place. [2022-12-13 13:27:16,572 INFO L137 encePairwiseOnDemand]: 189/192 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2022-12-13 13:27:16,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 82 flow [2022-12-13 13:27:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:27:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:27:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2022-12-13 13:27:16,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2022-12-13 13:27:16,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2022-12-13 13:27:16,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2022-12-13 13:27:16,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:16,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2022-12-13 13:27:16,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,579 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 40 flow. Second operand 3 states and 273 transitions. [2022-12-13 13:27:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 82 flow [2022-12-13 13:27:16,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:27:16,580 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 52 flow [2022-12-13 13:27:16,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2022-12-13 13:27:16,581 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2022-12-13 13:27:16,581 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 52 flow [2022-12-13 13:27:16,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,581 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:16,582 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 13:27:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:27:16,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 333774356, now seen corresponding path program 1 times [2022-12-13 13:27:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:16,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111346585] [2022-12-13 13:27:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:16,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111346585] [2022-12-13 13:27:16,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111346585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:27:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064579341] [2022-12-13 13:27:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:16,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:27:16,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:27:16,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:27:16,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:27:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:27:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:27:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:27:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:16,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064579341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:27:16,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:27:16,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 13:27:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987677847] [2022-12-13 13:27:16,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:27:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:27:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:27:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:27:16,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 192 [2022-12-13 13:27:16,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:16,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 192 [2022-12-13 13:27:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:16,848 INFO L130 PetriNetUnfolder]: 57/135 cut-off events. [2022-12-13 13:27:16,849 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:27:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 57/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 448 event pairs, 56 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 280. Up to 132 conditions per place. [2022-12-13 13:27:16,849 INFO L137 encePairwiseOnDemand]: 189/192 looper letters, 18 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2022-12-13 13:27:16,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 110 flow [2022-12-13 13:27:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:27:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:27:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 524 transitions. [2022-12-13 13:27:16,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2022-12-13 13:27:16,852 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 524 transitions. [2022-12-13 13:27:16,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 524 transitions. [2022-12-13 13:27:16,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:16,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 524 transitions. [2022-12-13 13:27:16,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.33333333333333) internal successors, (524), 6 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,856 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,856 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 6 states and 524 transitions. [2022-12-13 13:27:16,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 110 flow [2022-12-13 13:27:16,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 106 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:27:16,857 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 84 flow [2022-12-13 13:27:16,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-12-13 13:27:16,857 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2022-12-13 13:27:16,857 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 84 flow [2022-12-13 13:27:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:16,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:16,858 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 13:27:16,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:27:17,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:27:17,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 209463342, now seen corresponding path program 2 times [2022-12-13 13:27:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:17,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579536472] [2022-12-13 13:27:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:17,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:17,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579536472] [2022-12-13 13:27:17,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579536472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:27:17,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819299283] [2022-12-13 13:27:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:27:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:27:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:27:17,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:27:17,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:27:17,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:27:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:27:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:27:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:27:17,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:27:17,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:27:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:27:17,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:27:17,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819299283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:17,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:27:17,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 13:27:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109968746] [2022-12-13 13:27:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:17,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:27:17,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:27:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:27:17,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2022-12-13 13:27:17,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:17,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:17,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2022-12-13 13:27:17,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:17,513 INFO L130 PetriNetUnfolder]: 49/118 cut-off events. [2022-12-13 13:27:17,513 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:27:17,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 118 events. 49/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 371 event pairs, 48 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 256. Up to 118 conditions per place. [2022-12-13 13:27:17,514 INFO L137 encePairwiseOnDemand]: 190/192 looper letters, 21 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2022-12-13 13:27:17,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 126 flow [2022-12-13 13:27:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:27:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:27:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2022-12-13 13:27:17,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2022-12-13 13:27:17,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2022-12-13 13:27:17,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2022-12-13 13:27:17,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:17,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2022-12-13 13:27:17,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:17,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:17,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:17,520 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 84 flow. Second operand 3 states and 277 transitions. [2022-12-13 13:27:17,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 126 flow [2022-12-13 13:27:17,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 112 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:27:17,521 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 70 flow [2022-12-13 13:27:17,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2022-12-13 13:27:17,522 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2022-12-13 13:27:17,522 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 70 flow [2022-12-13 13:27:17,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:17,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:17,523 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 13:27:17,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:27:17,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:27:17,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash 209463314, now seen corresponding path program 1 times [2022-12-13 13:27:17,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:17,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462957418] [2022-12-13 13:27:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:17,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:17,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:17,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462957418] [2022-12-13 13:27:17,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462957418] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:27:17,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50763997] [2022-12-13 13:27:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:27:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:27:17,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:27:17,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:27:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:27:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:27:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:17,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:27:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:27:17,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50763997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:27:17,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:27:17,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-13 13:27:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800490150] [2022-12-13 13:27:17,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:27:17,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:27:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:27:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:27:17,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 192 [2022-12-13 13:27:17,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 70 flow. Second operand has 12 states, 12 states have (on average 84.16666666666667) internal successors, (1010), 12 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:17,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:17,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 192 [2022-12-13 13:27:17,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:18,006 INFO L130 PetriNetUnfolder]: 49/124 cut-off events. [2022-12-13 13:27:18,007 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 13:27:18,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 124 events. 49/124 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 369 event pairs, 48 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 274. Up to 115 conditions per place. [2022-12-13 13:27:18,007 INFO L137 encePairwiseOnDemand]: 189/192 looper letters, 17 selfloop transitions, 11 changer transitions 0/28 dead transitions. [2022-12-13 13:27:18,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 162 flow [2022-12-13 13:27:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:27:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:27:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1030 transitions. [2022-12-13 13:27:18,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4470486111111111 [2022-12-13 13:27:18,010 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1030 transitions. [2022-12-13 13:27:18,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1030 transitions. [2022-12-13 13:27:18,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:18,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1030 transitions. [2022-12-13 13:27:18,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 85.83333333333333) internal successors, (1030), 12 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,014 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,015 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 70 flow. Second operand 12 states and 1030 transitions. [2022-12-13 13:27:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 162 flow [2022-12-13 13:27:18,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 28 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:27:18,016 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 153 flow [2022-12-13 13:27:18,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=153, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2022-12-13 13:27:18,016 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2022-12-13 13:27:18,016 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 153 flow [2022-12-13 13:27:18,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 84.16666666666667) internal successors, (1010), 12 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:18,017 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 13:27:18,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:27:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:27:18,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -602259886, now seen corresponding path program 2 times [2022-12-13 13:27:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:18,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12329846] [2022-12-13 13:27:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:27:18,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12329846] [2022-12-13 13:27:18,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12329846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:18,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:18,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:27:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810593071] [2022-12-13 13:27:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:18,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:27:18,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:18,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:27:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:27:18,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2022-12-13 13:27:18,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:18,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2022-12-13 13:27:18,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:18,434 INFO L130 PetriNetUnfolder]: 43/111 cut-off events. [2022-12-13 13:27:18,435 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-13 13:27:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 111 events. 43/111 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 301 event pairs, 30 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 272. Up to 85 conditions per place. [2022-12-13 13:27:18,436 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 30 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2022-12-13 13:27:18,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 33 transitions, 229 flow [2022-12-13 13:27:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:27:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:27:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-12-13 13:27:18,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2022-12-13 13:27:18,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-12-13 13:27:18,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-12-13 13:27:18,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:18,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-12-13 13:27:18,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,438 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 153 flow. Second operand 3 states and 276 transitions. [2022-12-13 13:27:18,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 33 transitions, 229 flow [2022-12-13 13:27:18,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 181 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 13:27:18,440 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 109 flow [2022-12-13 13:27:18,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2022-12-13 13:27:18,441 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2022-12-13 13:27:18,441 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 109 flow [2022-12-13 13:27:18,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:18,441 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 13:27:18,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:27:18,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash -602259885, now seen corresponding path program 1 times [2022-12-13 13:27:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384383711] [2022-12-13 13:27:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:27:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:18,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384383711] [2022-12-13 13:27:18,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384383711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:18,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:18,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:27:18,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910768706] [2022-12-13 13:27:18,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:18,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:27:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:27:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:27:18,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2022-12-13 13:27:18,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:18,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2022-12-13 13:27:18,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:18,699 INFO L130 PetriNetUnfolder]: 37/98 cut-off events. [2022-12-13 13:27:18,699 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 13:27:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 98 events. 37/98 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 247 event pairs, 36 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 237. Up to 86 conditions per place. [2022-12-13 13:27:18,700 INFO L137 encePairwiseOnDemand]: 189/192 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2022-12-13 13:27:18,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 26 transitions, 159 flow [2022-12-13 13:27:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:27:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:27:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2022-12-13 13:27:18,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4388020833333333 [2022-12-13 13:27:18,701 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2022-12-13 13:27:18,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2022-12-13 13:27:18,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:18,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2022-12-13 13:27:18,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,703 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 109 flow. Second operand 4 states and 337 transitions. [2022-12-13 13:27:18,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 26 transitions, 159 flow [2022-12-13 13:27:18,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:27:18,704 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 105 flow [2022-12-13 13:27:18,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2022-12-13 13:27:18,705 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2022-12-13 13:27:18,705 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 105 flow [2022-12-13 13:27:18,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:18,705 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 13:27:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:27:18,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1490186260, now seen corresponding path program 1 times [2022-12-13 13:27:18,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:18,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280906520] [2022-12-13 13:27:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:18,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:27:18,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280906520] [2022-12-13 13:27:18,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280906520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:18,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:18,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:27:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438650254] [2022-12-13 13:27:18,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:27:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:27:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:27:18,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 192 [2022-12-13 13:27:18,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:18,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 192 [2022-12-13 13:27:18,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:18,957 INFO L130 PetriNetUnfolder]: 23/80 cut-off events. [2022-12-13 13:27:18,957 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 13:27:18,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 80 events. 23/80 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 213 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 188. Up to 36 conditions per place. [2022-12-13 13:27:18,958 INFO L137 encePairwiseOnDemand]: 184/192 looper letters, 30 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2022-12-13 13:27:18,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 205 flow [2022-12-13 13:27:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:27:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:27:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2022-12-13 13:27:18,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44375 [2022-12-13 13:27:18,959 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2022-12-13 13:27:18,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2022-12-13 13:27:18,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:18,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2022-12-13 13:27:18,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,961 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,961 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 105 flow. Second operand 5 states and 426 transitions. [2022-12-13 13:27:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 205 flow [2022-12-13 13:27:18,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:27:18,962 INFO L231 Difference]: Finished difference. Result has 50 places, 31 transitions, 156 flow [2022-12-13 13:27:18,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=31} [2022-12-13 13:27:18,963 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2022-12-13 13:27:18,963 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 31 transitions, 156 flow [2022-12-13 13:27:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:18,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:18,963 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:27:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:27:18,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1406484503, now seen corresponding path program 1 times [2022-12-13 13:27:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278315278] [2022-12-13 13:27:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:27:19,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278315278] [2022-12-13 13:27:19,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278315278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:19,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:19,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:27:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014294868] [2022-12-13 13:27:19,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:27:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:27:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:27:19,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2022-12-13 13:27:19,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 31 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:19,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2022-12-13 13:27:19,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:19,123 INFO L130 PetriNetUnfolder]: 20/67 cut-off events. [2022-12-13 13:27:19,123 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-12-13 13:27:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 67 events. 20/67 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 16 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 202. Up to 42 conditions per place. [2022-12-13 13:27:19,124 INFO L137 encePairwiseOnDemand]: 188/192 looper letters, 21 selfloop transitions, 4 changer transitions 6/31 dead transitions. [2022-12-13 13:27:19,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 31 transitions, 212 flow [2022-12-13 13:27:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:27:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:27:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2022-12-13 13:27:19,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2022-12-13 13:27:19,126 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2022-12-13 13:27:19,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2022-12-13 13:27:19,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:19,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2022-12-13 13:27:19,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,128 INFO L175 Difference]: Start difference. First operand has 50 places, 31 transitions, 156 flow. Second operand 4 states and 340 transitions. [2022-12-13 13:27:19,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 31 transitions, 212 flow [2022-12-13 13:27:19,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 212 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:27:19,130 INFO L231 Difference]: Finished difference. Result has 52 places, 25 transitions, 134 flow [2022-12-13 13:27:19,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=25} [2022-12-13 13:27:19,131 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2022-12-13 13:27:19,131 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 25 transitions, 134 flow [2022-12-13 13:27:19,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:27:19,132 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:27:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:27:19,132 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-13 13:27:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:27:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash 952542555, now seen corresponding path program 1 times [2022-12-13 13:27:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:27:19,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183418709] [2022-12-13 13:27:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:27:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:27:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:27:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:27:19,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:27:19,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183418709] [2022-12-13 13:27:19,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183418709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:27:19,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:27:19,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:27:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616775810] [2022-12-13 13:27:19,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:27:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:27:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:27:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:27:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:27:19,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 192 [2022-12-13 13:27:19,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 25 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:27:19,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 192 [2022-12-13 13:27:19,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:27:19,413 INFO L130 PetriNetUnfolder]: 13/46 cut-off events. [2022-12-13 13:27:19,413 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-12-13 13:27:19,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 46 events. 13/46 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 2/48 useless extension candidates. Maximal degree in co-relation 154. Up to 16 conditions per place. [2022-12-13 13:27:19,414 INFO L137 encePairwiseOnDemand]: 183/192 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2022-12-13 13:27:19,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 33 transitions, 218 flow [2022-12-13 13:27:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:27:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:27:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2022-12-13 13:27:19,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2022-12-13 13:27:19,417 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2022-12-13 13:27:19,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2022-12-13 13:27:19,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:27:19,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2022-12-13 13:27:19,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,423 INFO L175 Difference]: Start difference. First operand has 52 places, 25 transitions, 134 flow. Second operand 7 states and 536 transitions. [2022-12-13 13:27:19,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 33 transitions, 218 flow [2022-12-13 13:27:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 33 transitions, 201 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 13:27:19,425 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2022-12-13 13:27:19,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2022-12-13 13:27:19,425 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2022-12-13 13:27:19,425 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2022-12-13 13:27:19,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:27:19,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2022-12-13 13:27:19,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-12-13 13:27:19,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-12-13 13:27:19,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:27:19,430 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:27:19,434 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 13:27:19,434 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 13:27:19,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 01:27:19 BasicIcfg [2022-12-13 13:27:19,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 13:27:19,437 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:27:19,437 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:27:19,437 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:27:19,437 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:27:14" (3/4) ... [2022-12-13 13:27:19,439 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 13:27:19,444 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-12-13 13:27:19,446 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-12-13 13:27:19,446 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 13:27:19,446 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 13:27:19,468 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 13:27:19,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:27:19,468 INFO L158 Benchmark]: Toolchain (without parser) took 6293.94ms. Allocated memory was 134.2MB in the beginning and 180.4MB in the end (delta: 46.1MB). Free memory was 97.6MB in the beginning and 71.1MB in the end (delta: 26.5MB). Peak memory consumption was 74.6MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,469 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 134.2MB. Free memory is still 104.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:27:19,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 472.34ms. Allocated memory is still 134.2MB. Free memory was 97.6MB in the beginning and 69.9MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,469 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.04ms. Allocated memory is still 134.2MB. Free memory was 69.9MB in the beginning and 67.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,469 INFO L158 Benchmark]: Boogie Preprocessor took 27.61ms. Allocated memory is still 134.2MB. Free memory was 67.8MB in the beginning and 66.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,470 INFO L158 Benchmark]: RCFGBuilder took 339.95ms. Allocated memory is still 134.2MB. Free memory was 66.2MB in the beginning and 51.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,470 INFO L158 Benchmark]: TraceAbstraction took 5373.26ms. Allocated memory was 134.2MB in the beginning and 180.4MB in the end (delta: 46.1MB). Free memory was 50.6MB in the beginning and 74.3MB in the end (delta: -23.7MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,470 INFO L158 Benchmark]: Witness Printer took 31.27ms. Allocated memory is still 180.4MB. Free memory was 74.3MB in the beginning and 71.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 13:27:19,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 134.2MB. Free memory is still 104.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 472.34ms. Allocated memory is still 134.2MB. Free memory was 97.6MB in the beginning and 69.9MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.04ms. Allocated memory is still 134.2MB. Free memory was 69.9MB in the beginning and 67.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.61ms. Allocated memory is still 134.2MB. Free memory was 67.8MB in the beginning and 66.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 339.95ms. Allocated memory is still 134.2MB. Free memory was 66.2MB in the beginning and 51.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5373.26ms. Allocated memory was 134.2MB in the beginning and 180.4MB in the end (delta: 46.1MB). Free memory was 50.6MB in the beginning and 74.3MB in the end (delta: -23.7MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. * Witness Printer took 31.27ms. Allocated memory is still 180.4MB. Free memory was 74.3MB in the beginning and 71.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 91 PlacesBefore, 27 PlacesAfterwards, 91 TransitionsBefore, 24 TransitionsAfterwards, 1380 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 100 TotalNumberOfCompositions, 2409 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1438, independent: 1330, independent conditional: 0, independent unconditional: 1330, dependent: 108, dependent conditional: 0, dependent unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 864, independent: 837, independent conditional: 0, independent unconditional: 837, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1438, independent: 493, independent conditional: 0, independent unconditional: 493, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 864, unknown conditional: 0, unknown unconditional: 864] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 936]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 120 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.2s, OverallIterations: 10, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 728 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 443 mSDsluCounter, 75 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 52 mSDsCounter, 86 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1179 IncrementalHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 86 mSolverCounterUnsat, 23 mSDtfsCounter, 1179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=8, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 129 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 970 SizeOfPredicates, 2 NumberOfNonLiveVariables, 260 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 15 InterpolantComputations, 8 PerfectInterpolantSequences, 285/328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 13:27:19,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_066fae0b-7a11-4275-9426-d61090597a53/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE