./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.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_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/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_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/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_f15cf489-45a1-49fc-bc79-881494d86878/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 ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 --- 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 19:43:18,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:43:18,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:43:18,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:43:18,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:43:18,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:43:18,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:43:18,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:43:18,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:43:18,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:43:18,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:43:18,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:43:18,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:43:18,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:43:18,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:43:18,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:43:18,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:43:18,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:43:18,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:43:18,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:43:18,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:43:18,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:43:18,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:43:18,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:43:18,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:43:18,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:43:18,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:43:18,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:43:18,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:43:18,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:43:18,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:43:18,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:43:18,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:43:18,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:43:18,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:43:18,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:43:18,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:43:18,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:43:18,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:43:18,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:43:18,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:43:18,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:43:18,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:43:18,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:43:18,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:43:18,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:43:18,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:43:18,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:43:18,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:43:18,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:43:18,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:43:18,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:43:18,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:43:18,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:43:18,870 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:43:18,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:43:18,871 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:43:18,871 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_f15cf489-45a1-49fc-bc79-881494d86878/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebedbc62bd44b0c214a81c07c6f99e850a5d96675b77716f8547d1b39e8b2cf8 [2022-12-13 19:43:19,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:43:19,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:43:19,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:43:19,078 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:43:19,078 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:43:19,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2022-12-13 19:43:21,667 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:43:21,889 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:43:21,890 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/sv-benchmarks/c/goblint-regression/06-symbeq_02-funloop_norace.i [2022-12-13 19:43:21,902 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/data/2cd3b583f/f460f8d3c07b4f838c2e4a619e210b98/FLAG84838e57a [2022-12-13 19:43:22,243 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/data/2cd3b583f/f460f8d3c07b4f838c2e4a619e210b98 [2022-12-13 19:43:22,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:43:22,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:43:22,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:43:22,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:43:22,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:43:22,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604bc51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22, skipping insertion in model container [2022-12-13 19:43:22,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:43:22,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:43:22,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:43:22,601 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:43:22,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:43:22,693 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:43:22,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22 WrapperNode [2022-12-13 19:43:22,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:43:22,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:43:22,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:43:22,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:43:22,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,724 INFO L138 Inliner]: procedures = 262, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-12-13 19:43:22,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:43:22,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:43:22,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:43:22,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:43:22,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:43:22,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:43:22,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:43:22,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:43:22,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (1/1) ... [2022-12-13 19:43:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:43:22,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:22,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:43:22,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:43:22,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:43:22,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:43:22,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:43:22,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:43:22,796 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 19:43:22,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:43:22,796 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 19:43:22,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 19:43:22,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:43:22,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:43:22,797 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 19:43:22,894 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:43:22,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:43:23,047 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:43:23,052 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:43:23,052 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 19:43:23,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:43:23 BoogieIcfgContainer [2022-12-13 19:43:23,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:43:23,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:43:23,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:43:23,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:43:23,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:43:22" (1/3) ... [2022-12-13 19:43:23,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a8d9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:43:23, skipping insertion in model container [2022-12-13 19:43:23,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:43:22" (2/3) ... [2022-12-13 19:43:23,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a8d9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:43:23, skipping insertion in model container [2022-12-13 19:43:23,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:43:23" (3/3) ... [2022-12-13 19:43:23,067 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_02-funloop_norace.i [2022-12-13 19:43:23,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:43:23,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-12-13 19:43:23,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:43:23,124 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 19:43:23,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 92 transitions, 189 flow [2022-12-13 19:43:23,174 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2022-12-13 19:43:23,174 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:23,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 91 events. 6/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-12-13 19:43:23,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 92 transitions, 189 flow [2022-12-13 19:43:23,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 91 transitions, 185 flow [2022-12-13 19:43:23,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:43:23,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 91 transitions, 185 flow [2022-12-13 19:43:23,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 91 transitions, 185 flow [2022-12-13 19:43:23,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 91 transitions, 185 flow [2022-12-13 19:43:23,206 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2022-12-13 19:43:23,207 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:23,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 91 events. 6/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-12-13 19:43:23,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2022-12-13 19:43:24,758 INFO L134 LiptonReduction]: Checked pairs total: 2707 [2022-12-13 19:43:24,758 INFO L136 LiptonReduction]: Total number of compositions: 93 [2022-12-13 19:43:24,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:43:24,772 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;@7a718ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:43:24,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-12-13 19:43:24,773 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 19:43:24,773 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:24,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:24,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:43:24,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 11552, now seen corresponding path program 1 times [2022-12-13 19:43:24,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:24,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738518119] [2022-12-13 19:43:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:24,878 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 19:43:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738518119] [2022-12-13 19:43:24,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738518119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:24,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:24,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:43:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612889889] [2022-12-13 19:43:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:43:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:43:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:43:24,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 185 [2022-12-13 19:43:24,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 57 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 19:43:24,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:24,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 185 [2022-12-13 19:43:24,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:24,961 INFO L130 PetriNetUnfolder]: 74/156 cut-off events. [2022-12-13 19:43:24,961 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:24,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 156 events. 74/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 591 event pairs, 56 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 296. Up to 149 conditions per place. [2022-12-13 19:43:24,963 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2022-12-13 19:43:24,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 89 flow [2022-12-13 19:43:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:43:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:43:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-12-13 19:43:24,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5459459459459459 [2022-12-13 19:43:24,973 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-12-13 19:43:24,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-12-13 19:43:24,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:24,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-12-13 19:43:24,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:24,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:24,981 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:24,983 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 57 flow. Second operand 2 states and 202 transitions. [2022-12-13 19:43:24,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 89 flow [2022-12-13 19:43:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:24,986 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 46 flow [2022-12-13 19:43:24,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2022-12-13 19:43:24,990 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2022-12-13 19:43:24,990 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 46 flow [2022-12-13 19:43:24,991 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 19:43:24,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:24,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:43:24,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:43:24,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 344328107, now seen corresponding path program 1 times [2022-12-13 19:43:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530496389] [2022-12-13 19:43:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:43:25,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:25,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530496389] [2022-12-13 19:43:25,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530496389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:25,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:25,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:43:25,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079737517] [2022-12-13 19:43:25,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:43:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:43:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:43:25,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2022-12-13 19:43:25,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:25,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2022-12-13 19:43:25,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:25,120 INFO L130 PetriNetUnfolder]: 74/157 cut-off events. [2022-12-13 19:43:25,120 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:25,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 157 events. 74/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 587 event pairs, 56 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 308. Up to 149 conditions per place. [2022-12-13 19:43:25,121 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-13 19:43:25,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 92 flow [2022-12-13 19:43:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:43:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:43:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2022-12-13 19:43:25,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2022-12-13 19:43:25,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2022-12-13 19:43:25,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2022-12-13 19:43:25,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:25,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2022-12-13 19:43:25,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,131 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 46 flow. Second operand 3 states and 275 transitions. [2022-12-13 19:43:25,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 92 flow [2022-12-13 19:43:25,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:43:25,132 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 58 flow [2022-12-13 19:43:25,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2022-12-13 19:43:25,133 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2022-12-13 19:43:25,133 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 58 flow [2022-12-13 19:43:25,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:25,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:43:25,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:43:25,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2073817169, now seen corresponding path program 1 times [2022-12-13 19:43:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:25,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268521856] [2022-12-13 19:43:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:25,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:25,195 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 19:43:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:25,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268521856] [2022-12-13 19:43:25,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268521856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:25,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153255897] [2022-12-13 19:43:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:25,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:25,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:25,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:25,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:43:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:43:25,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:25,278 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 19:43:25,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:25,290 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 19:43:25,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153255897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:25,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:25,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:43:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106171289] [2022-12-13 19:43:25,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:25,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:43:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:43:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:43:25,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 185 [2022-12-13 19:43:25,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:25,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 185 [2022-12-13 19:43:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:25,390 INFO L130 PetriNetUnfolder]: 74/160 cut-off events. [2022-12-13 19:43:25,390 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:43:25,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 160 events. 74/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 587 event pairs, 56 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 322. Up to 149 conditions per place. [2022-12-13 19:43:25,391 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2022-12-13 19:43:25,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 120 flow [2022-12-13 19:43:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:43:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:43:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2022-12-13 19:43:25,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47387387387387386 [2022-12-13 19:43:25,395 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2022-12-13 19:43:25,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2022-12-13 19:43:25,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:25,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2022-12-13 19:43:25,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,401 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,401 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 6 states and 526 transitions. [2022-12-13 19:43:25,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 120 flow [2022-12-13 19:43:25,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 116 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:25,403 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2022-12-13 19:43:25,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2022-12-13 19:43:25,404 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2022-12-13 19:43:25,404 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2022-12-13 19:43:25,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:25,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:25,405 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-13 19:43:25,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:25,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 521011499, now seen corresponding path program 2 times [2022-12-13 19:43:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469224419] [2022-12-13 19:43:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:25,815 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 19:43:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469224419] [2022-12-13 19:43:25,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469224419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499810605] [2022-12-13 19:43:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:43:25,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:25,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:25,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:43:25,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:43:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:43:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:43:25,954 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 19:43:25,988 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 19:43:25,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:43:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499810605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:25,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:43:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-12-13 19:43:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536943863] [2022-12-13 19:43:25,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:25,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:43:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:43:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:43:26,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 185 [2022-12-13 19:43:26,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:26,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 185 [2022-12-13 19:43:26,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:26,157 INFO L130 PetriNetUnfolder]: 114/234 cut-off events. [2022-12-13 19:43:26,157 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:43:26,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 234 events. 114/234 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 891 event pairs, 56 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 486. Up to 152 conditions per place. [2022-12-13 19:43:26,158 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 35 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2022-12-13 19:43:26,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 192 flow [2022-12-13 19:43:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:43:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:43:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 361 transitions. [2022-12-13 19:43:26,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48783783783783785 [2022-12-13 19:43:26,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 361 transitions. [2022-12-13 19:43:26,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 361 transitions. [2022-12-13 19:43:26,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:26,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 361 transitions. [2022-12-13 19:43:26,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,164 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 4 states and 361 transitions. [2022-12-13 19:43:26,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 192 flow [2022-12-13 19:43:26,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 178 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:26,166 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 94 flow [2022-12-13 19:43:26,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2022-12-13 19:43:26,166 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2022-12-13 19:43:26,167 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 94 flow [2022-12-13 19:43:26,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:26,167 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-13 19:43:26,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:43:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 19:43:26,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash 521011500, now seen corresponding path program 1 times [2022-12-13 19:43:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:26,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328833859] [2022-12-13 19:43:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:26,431 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 19:43:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328833859] [2022-12-13 19:43:26,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328833859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:26,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007677970] [2022-12-13 19:43:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:26,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:26,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:26,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:43:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:43:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:26,502 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 19:43:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:26,541 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 19:43:26,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007677970] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:26,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:26,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 19:43:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606644492] [2022-12-13 19:43:26,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:26,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:43:26,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:43:26,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:43:26,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 185 [2022-12-13 19:43:26,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 84.3076923076923) internal successors, (1096), 13 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:26,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 185 [2022-12-13 19:43:26,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:26,658 INFO L130 PetriNetUnfolder]: 114/242 cut-off events. [2022-12-13 19:43:26,659 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-12-13 19:43:26,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 242 events. 114/242 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 869 event pairs, 91 based on Foata normal form. 6/174 useless extension candidates. Maximal degree in co-relation 562. Up to 229 conditions per place. [2022-12-13 19:43:26,661 INFO L137 encePairwiseOnDemand]: 182/185 looper letters, 21 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2022-12-13 19:43:26,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 194 flow [2022-12-13 19:43:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:43:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:43:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1033 transitions. [2022-12-13 19:43:26,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46531531531531534 [2022-12-13 19:43:26,664 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1033 transitions. [2022-12-13 19:43:26,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1033 transitions. [2022-12-13 19:43:26,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1033 transitions. [2022-12-13 19:43:26,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.08333333333333) internal successors, (1033), 12 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,672 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 185.0) internal successors, (2405), 13 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,672 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 94 flow. Second operand 12 states and 1033 transitions. [2022-12-13 19:43:26,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 194 flow [2022-12-13 19:43:26,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:26,674 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 174 flow [2022-12-13 19:43:26,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2022-12-13 19:43:26,675 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2022-12-13 19:43:26,675 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 174 flow [2022-12-13 19:43:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.3076923076923) internal successors, (1096), 13 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:26,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:26,676 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 19:43:26,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:26,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:26,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1413902317, now seen corresponding path program 1 times [2022-12-13 19:43:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864696611] [2022-12-13 19:43:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:27,159 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 19:43:27,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:27,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864696611] [2022-12-13 19:43:27,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864696611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:27,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:27,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:43:27,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188559537] [2022-12-13 19:43:27,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:27,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:43:27,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:43:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:43:27,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 185 [2022-12-13 19:43:27,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:27,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 185 [2022-12-13 19:43:27,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:27,313 INFO L130 PetriNetUnfolder]: 184/406 cut-off events. [2022-12-13 19:43:27,313 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2022-12-13 19:43:27,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 406 events. 184/406 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1807 event pairs, 91 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 911. Up to 238 conditions per place. [2022-12-13 19:43:27,315 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 44 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2022-12-13 19:43:27,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 310 flow [2022-12-13 19:43:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:43:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:43:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2022-12-13 19:43:27,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49324324324324326 [2022-12-13 19:43:27,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 365 transitions. [2022-12-13 19:43:27,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 365 transitions. [2022-12-13 19:43:27,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:27,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 365 transitions. [2022-12-13 19:43:27,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,320 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 174 flow. Second operand 4 states and 365 transitions. [2022-12-13 19:43:27,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 310 flow [2022-12-13 19:43:27,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 262 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 19:43:27,323 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 142 flow [2022-12-13 19:43:27,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2022-12-13 19:43:27,323 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2022-12-13 19:43:27,323 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 142 flow [2022-12-13 19:43:27,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:27,323 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 19:43:27,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:43:27,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:27,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1413902484, now seen corresponding path program 2 times [2022-12-13 19:43:27,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482646815] [2022-12-13 19:43:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:27,414 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 19:43:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:27,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482646815] [2022-12-13 19:43:27,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482646815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:27,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:27,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:43:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376172616] [2022-12-13 19:43:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:27,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:43:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:43:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:43:27,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 185 [2022-12-13 19:43:27,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:27,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 185 [2022-12-13 19:43:27,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:27,529 INFO L130 PetriNetUnfolder]: 158/334 cut-off events. [2022-12-13 19:43:27,530 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-12-13 19:43:27,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 334 events. 158/334 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1279 event pairs, 108 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 836. Up to 274 conditions per place. [2022-12-13 19:43:27,531 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 38 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2022-12-13 19:43:27,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 252 flow [2022-12-13 19:43:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:43:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:43:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2022-12-13 19:43:27,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5171171171171172 [2022-12-13 19:43:27,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2022-12-13 19:43:27,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2022-12-13 19:43:27,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:27,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2022-12-13 19:43:27,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,534 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 142 flow. Second operand 3 states and 287 transitions. [2022-12-13 19:43:27,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 252 flow [2022-12-13 19:43:27,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:27,536 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 142 flow [2022-12-13 19:43:27,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2022-12-13 19:43:27,537 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2022-12-13 19:43:27,537 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 142 flow [2022-12-13 19:43:27,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:27,537 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:27,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:43:27,538 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash -881298532, now seen corresponding path program 1 times [2022-12-13 19:43:27,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628426835] [2022-12-13 19:43:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:27,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:27,629 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 19:43:27,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628426835] [2022-12-13 19:43:27,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628426835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:27,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:43:27,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:43:27,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274333531] [2022-12-13 19:43:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:27,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:43:27,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:43:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:43:27,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-12-13 19:43:27,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:27,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-12-13 19:43:27,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:27,798 INFO L130 PetriNetUnfolder]: 136/300 cut-off events. [2022-12-13 19:43:27,798 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-12-13 19:43:27,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 300 events. 136/300 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1144 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 782. Up to 190 conditions per place. [2022-12-13 19:43:27,800 INFO L137 encePairwiseOnDemand]: 176/185 looper letters, 47 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2022-12-13 19:43:27,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 338 flow [2022-12-13 19:43:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:43:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:43:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 445 transitions. [2022-12-13 19:43:27,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2022-12-13 19:43:27,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 445 transitions. [2022-12-13 19:43:27,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 445 transitions. [2022-12-13 19:43:27,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:27,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 445 transitions. [2022-12-13 19:43:27,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,803 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 142 flow. Second operand 5 states and 445 transitions. [2022-12-13 19:43:27,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 338 flow [2022-12-13 19:43:27,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:27,805 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 212 flow [2022-12-13 19:43:27,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2022-12-13 19:43:27,805 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2022-12-13 19:43:27,805 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 212 flow [2022-12-13 19:43:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:27,806 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:27,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:43:27,806 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash 219585400, now seen corresponding path program 1 times [2022-12-13 19:43:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:27,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041382118] [2022-12-13 19:43:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:27,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:27,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041382118] [2022-12-13 19:43:27,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041382118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:27,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838586619] [2022-12-13 19:43:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:27,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:27,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:27,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:43:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:43:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:27,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:27,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838586619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:27,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:27,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:43:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55616325] [2022-12-13 19:43:27,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:27,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:43:27,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:43:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:43:27,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 185 [2022-12-13 19:43:27,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 212 flow. Second operand has 7 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:27,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:27,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 185 [2022-12-13 19:43:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:28,117 INFO L130 PetriNetUnfolder]: 268/553 cut-off events. [2022-12-13 19:43:28,117 INFO L131 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-12-13 19:43:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 553 events. 268/553 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2068 event pairs, 20 based on Foata normal form. 33/575 useless extension candidates. Maximal degree in co-relation 1656. Up to 132 conditions per place. [2022-12-13 19:43:28,119 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 83 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2022-12-13 19:43:28,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 600 flow [2022-12-13 19:43:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:43:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:43:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2022-12-13 19:43:28,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5063063063063064 [2022-12-13 19:43:28,121 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2022-12-13 19:43:28,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2022-12-13 19:43:28,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:28,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2022-12-13 19:43:28,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:28,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:28,123 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:28,123 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 212 flow. Second operand 6 states and 562 transitions. [2022-12-13 19:43:28,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 600 flow [2022-12-13 19:43:28,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 91 transitions, 600 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:43:28,125 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 280 flow [2022-12-13 19:43:28,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2022-12-13 19:43:28,126 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2022-12-13 19:43:28,126 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 280 flow [2022-12-13 19:43:28,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:28,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:28,126 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:28,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:28,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:28,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:28,327 INFO L85 PathProgramCache]: Analyzing trace with hash 219585402, now seen corresponding path program 1 times [2022-12-13 19:43:28,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:28,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125898188] [2022-12-13 19:43:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:28,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125898188] [2022-12-13 19:43:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125898188] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076582557] [2022-12-13 19:43:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:28,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:28,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:43:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:43:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:43:28,658 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 19:43:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:28,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:30,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076582557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:30,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:30,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-12-13 19:43:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838123792] [2022-12-13 19:43:30,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:43:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:43:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:43:31,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 185 [2022-12-13 19:43:31,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 280 flow. Second operand has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:31,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:31,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 185 [2022-12-13 19:43:31,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:31,346 INFO L130 PetriNetUnfolder]: 268/564 cut-off events. [2022-12-13 19:43:31,346 INFO L131 PetriNetUnfolder]: For 879/879 co-relation queries the response was YES. [2022-12-13 19:43:31,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 564 events. 268/564 cut-off events. For 879/879 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2115 event pairs, 60 based on Foata normal form. 33/586 useless extension candidates. Maximal degree in co-relation 1945. Up to 208 conditions per place. [2022-12-13 19:43:31,349 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 92 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2022-12-13 19:43:31,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 718 flow [2022-12-13 19:43:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:43:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:43:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 690 transitions. [2022-12-13 19:43:31,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46621621621621623 [2022-12-13 19:43:31,350 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 690 transitions. [2022-12-13 19:43:31,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 690 transitions. [2022-12-13 19:43:31,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:31,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 690 transitions. [2022-12-13 19:43:31,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.25) internal successors, (690), 8 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:31,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:31,353 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:31,353 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 280 flow. Second operand 8 states and 690 transitions. [2022-12-13 19:43:31,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 718 flow [2022-12-13 19:43:31,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 708 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:43:31,356 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 298 flow [2022-12-13 19:43:31,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2022-12-13 19:43:31,357 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2022-12-13 19:43:31,357 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 298 flow [2022-12-13 19:43:31,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:31,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:31,357 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:31,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:43:31,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:43:31,559 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash 371264757, now seen corresponding path program 1 times [2022-12-13 19:43:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:31,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584333932] [2022-12-13 19:43:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:31,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:31,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:31,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584333932] [2022-12-13 19:43:31,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584333932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:31,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731383735] [2022-12-13 19:43:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:31,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:31,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:31,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:31,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:43:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:31,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:43:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:32,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:43:32,007 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 19:43:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:32,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:32,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731383735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:32,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:32,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-12-13 19:43:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775222915] [2022-12-13 19:43:32,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:43:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:43:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:43:32,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 185 [2022-12-13 19:43:32,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 298 flow. Second operand has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:32,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:32,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 185 [2022-12-13 19:43:32,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:32,973 INFO L130 PetriNetUnfolder]: 556/1170 cut-off events. [2022-12-13 19:43:32,974 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2022-12-13 19:43:32,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4210 conditions, 1170 events. 556/1170 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5431 event pairs, 126 based on Foata normal form. 156/1303 useless extension candidates. Maximal degree in co-relation 4183. Up to 364 conditions per place. [2022-12-13 19:43:32,979 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 136 selfloop transitions, 8 changer transitions 0/145 dead transitions. [2022-12-13 19:43:32,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 145 transitions, 1286 flow [2022-12-13 19:43:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:43:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:43:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2022-12-13 19:43:32,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4797297297297297 [2022-12-13 19:43:32,981 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2022-12-13 19:43:32,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2022-12-13 19:43:32,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:32,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2022-12-13 19:43:32,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:32,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:32,983 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:32,984 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 298 flow. Second operand 8 states and 710 transitions. [2022-12-13 19:43:32,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 145 transitions, 1286 flow [2022-12-13 19:43:32,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 145 transitions, 1224 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-12-13 19:43:32,989 INFO L231 Difference]: Finished difference. Result has 78 places, 49 transitions, 351 flow [2022-12-13 19:43:32,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=351, PETRI_PLACES=78, PETRI_TRANSITIONS=49} [2022-12-13 19:43:32,989 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 50 predicate places. [2022-12-13 19:43:32,989 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 49 transitions, 351 flow [2022-12-13 19:43:32,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 80.0) internal successors, (1200), 15 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:32,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:32,990 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 19:43:32,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:43:33,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:33,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash 19529115, now seen corresponding path program 2 times [2022-12-13 19:43:33,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:33,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920036678] [2022-12-13 19:43:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:33,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:33,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920036678] [2022-12-13 19:43:33,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920036678] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526350459] [2022-12-13 19:43:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:43:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:33,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:33,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:43:33,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:43:33,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 19:43:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:43:33,714 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 19:43:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:36,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526350459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:36,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:36,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2022-12-13 19:43:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736781877] [2022-12-13 19:43:36,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:36,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 19:43:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:36,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 19:43:36,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:43:37,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 185 [2022-12-13 19:43:37,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 49 transitions, 351 flow. Second operand has 25 states, 25 states have (on average 80.64) internal successors, (2016), 25 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:37,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:37,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 185 [2022-12-13 19:43:37,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:38,453 INFO L130 PetriNetUnfolder]: 1132/2382 cut-off events. [2022-12-13 19:43:38,453 INFO L131 PetriNetUnfolder]: For 6519/6519 co-relation queries the response was YES. [2022-12-13 19:43:38,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9131 conditions, 2382 events. 1132/2382 cut-off events. For 6519/6519 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 11499 event pairs, 126 based on Foata normal form. 312/2647 useless extension candidates. Maximal degree in co-relation 9100. Up to 551 conditions per place. [2022-12-13 19:43:38,464 INFO L137 encePairwiseOnDemand]: 179/185 looper letters, 262 selfloop transitions, 14 changer transitions 0/277 dead transitions. [2022-12-13 19:43:38,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 277 transitions, 2405 flow [2022-12-13 19:43:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:43:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:43:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1262 transitions. [2022-12-13 19:43:38,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48725868725868726 [2022-12-13 19:43:38,467 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1262 transitions. [2022-12-13 19:43:38,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1262 transitions. [2022-12-13 19:43:38,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:38,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1262 transitions. [2022-12-13 19:43:38,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.14285714285714) internal successors, (1262), 14 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:38,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:38,471 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 185.0) internal successors, (2775), 15 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:38,471 INFO L175 Difference]: Start difference. First operand has 78 places, 49 transitions, 351 flow. Second operand 14 states and 1262 transitions. [2022-12-13 19:43:38,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 277 transitions, 2405 flow [2022-12-13 19:43:38,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 277 transitions, 2394 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 19:43:38,480 INFO L231 Difference]: Finished difference. Result has 95 places, 55 transitions, 454 flow [2022-12-13 19:43:38,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=454, PETRI_PLACES=95, PETRI_TRANSITIONS=55} [2022-12-13 19:43:38,480 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2022-12-13 19:43:38,480 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 55 transitions, 454 flow [2022-12-13 19:43:38,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.64) internal successors, (2016), 25 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:38,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:38,481 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 19:43:38,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:43:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 19:43:38,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash 390922919, now seen corresponding path program 2 times [2022-12-13 19:43:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935500056] [2022-12-13 19:43:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:38,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935500056] [2022-12-13 19:43:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935500056] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838171323] [2022-12-13 19:43:38,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:43:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:38,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:38,992 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:38,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:43:39,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:43:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 19:43:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:43:39,138 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 19:43:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:39,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:43:39,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838171323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:39,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:43:39,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-13 19:43:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455600523] [2022-12-13 19:43:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:43:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:43:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:43:39,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 185 [2022-12-13 19:43:39,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 55 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 83.44444444444444) internal successors, (751), 9 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:39,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:39,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 185 [2022-12-13 19:43:39,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:39,895 INFO L130 PetriNetUnfolder]: 1085/2288 cut-off events. [2022-12-13 19:43:39,895 INFO L131 PetriNetUnfolder]: For 8670/8670 co-relation queries the response was YES. [2022-12-13 19:43:39,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9388 conditions, 2288 events. 1085/2288 cut-off events. For 8670/8670 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 11310 event pairs, 0 based on Foata normal form. 47/2288 useless extension candidates. Maximal degree in co-relation 9351. Up to 701 conditions per place. [2022-12-13 19:43:39,907 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 147 selfloop transitions, 6 changer transitions 0/154 dead transitions. [2022-12-13 19:43:39,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 1680 flow [2022-12-13 19:43:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:43:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:43:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 719 transitions. [2022-12-13 19:43:39,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4858108108108108 [2022-12-13 19:43:39,908 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 719 transitions. [2022-12-13 19:43:39,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 719 transitions. [2022-12-13 19:43:39,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:39,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 719 transitions. [2022-12-13 19:43:39,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.875) internal successors, (719), 8 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:39,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:39,916 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:39,916 INFO L175 Difference]: Start difference. First operand has 95 places, 55 transitions, 454 flow. Second operand 8 states and 719 transitions. [2022-12-13 19:43:39,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 1680 flow [2022-12-13 19:43:39,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 154 transitions, 1448 flow, removed 78 selfloop flow, removed 7 redundant places. [2022-12-13 19:43:39,936 INFO L231 Difference]: Finished difference. Result has 94 places, 54 transitions, 416 flow [2022-12-13 19:43:39,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=416, PETRI_PLACES=94, PETRI_TRANSITIONS=54} [2022-12-13 19:43:39,936 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2022-12-13 19:43:39,936 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 54 transitions, 416 flow [2022-12-13 19:43:39,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.44444444444444) internal successors, (751), 9 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:39,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:39,937 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 19:43:39,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:43:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 19:43:40,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash 390922917, now seen corresponding path program 2 times [2022-12-13 19:43:40,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:40,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842742055] [2022-12-13 19:43:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:40,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842742055] [2022-12-13 19:43:40,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842742055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181277203] [2022-12-13 19:43:40,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:43:40,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:40,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:40,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:43:40,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:43:40,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:43:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-13 19:43:40,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:43:40,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181277203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:40,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:43:40,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 19:43:40,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202809920] [2022-12-13 19:43:40,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:40,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:43:40,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:40,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:43:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:43:40,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-12-13 19:43:40,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 54 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:40,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:40,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-12-13 19:43:40,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:40,800 INFO L130 PetriNetUnfolder]: 1037/2138 cut-off events. [2022-12-13 19:43:40,800 INFO L131 PetriNetUnfolder]: For 6746/6746 co-relation queries the response was YES. [2022-12-13 19:43:40,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8352 conditions, 2138 events. 1037/2138 cut-off events. For 6746/6746 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 10031 event pairs, 920 based on Foata normal form. 0/2138 useless extension candidates. Maximal degree in co-relation 8315. Up to 1976 conditions per place. [2022-12-13 19:43:40,810 INFO L137 encePairwiseOnDemand]: 181/185 looper letters, 61 selfloop transitions, 4 changer transitions 2/68 dead transitions. [2022-12-13 19:43:40,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 68 transitions, 651 flow [2022-12-13 19:43:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:43:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:43:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2022-12-13 19:43:40,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46756756756756757 [2022-12-13 19:43:40,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2022-12-13 19:43:40,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2022-12-13 19:43:40,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:40,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2022-12-13 19:43:40,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:40,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:40,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:40,812 INFO L175 Difference]: Start difference. First operand has 94 places, 54 transitions, 416 flow. Second operand 4 states and 346 transitions. [2022-12-13 19:43:40,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 68 transitions, 651 flow [2022-12-13 19:43:40,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 68 transitions, 640 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:43:40,820 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 363 flow [2022-12-13 19:43:40,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=363, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2022-12-13 19:43:40,821 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2022-12-13 19:43:40,821 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 363 flow [2022-12-13 19:43:40,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:40,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:40,821 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:43:40,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:41,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1503488621, now seen corresponding path program 1 times [2022-12-13 19:43:41,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:41,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034608156] [2022-12-13 19:43:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 19:43:41,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:41,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034608156] [2022-12-13 19:43:41,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034608156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952068644] [2022-12-13 19:43:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:41,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:41,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:43:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:43:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:41,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:43:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:41,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952068644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:43:41,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:43:41,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2022-12-13 19:43:41,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674348661] [2022-12-13 19:43:41,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:43:41,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:43:41,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:43:41,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:43:41,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 185 [2022-12-13 19:43:41,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 363 flow. Second operand has 16 states, 16 states have (on average 71.6875) internal successors, (1147), 16 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:41,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:41,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 185 [2022-12-13 19:43:41,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:42,797 INFO L130 PetriNetUnfolder]: 1981/4003 cut-off events. [2022-12-13 19:43:42,797 INFO L131 PetriNetUnfolder]: For 14890/14890 co-relation queries the response was YES. [2022-12-13 19:43:42,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14789 conditions, 4003 events. 1981/4003 cut-off events. For 14890/14890 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 19875 event pairs, 1 based on Foata normal form. 298/4301 useless extension candidates. Maximal degree in co-relation 14752. Up to 958 conditions per place. [2022-12-13 19:43:42,827 INFO L137 encePairwiseOnDemand]: 175/185 looper letters, 297 selfloop transitions, 64 changer transitions 0/361 dead transitions. [2022-12-13 19:43:42,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 361 transitions, 2944 flow [2022-12-13 19:43:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 19:43:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 19:43:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2764 transitions. [2022-12-13 19:43:42,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4037983929875822 [2022-12-13 19:43:42,833 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2764 transitions. [2022-12-13 19:43:42,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2764 transitions. [2022-12-13 19:43:42,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:42,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2764 transitions. [2022-12-13 19:43:42,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 74.70270270270271) internal successors, (2764), 37 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:42,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 185.0) internal successors, (7030), 38 states have internal predecessors, (7030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:42,845 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 185.0) internal successors, (7030), 38 states have internal predecessors, (7030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:42,845 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 363 flow. Second operand 37 states and 2764 transitions. [2022-12-13 19:43:42,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 361 transitions, 2944 flow [2022-12-13 19:43:42,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 361 transitions, 2921 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:43:42,861 INFO L231 Difference]: Finished difference. Result has 132 places, 101 transitions, 920 flow [2022-12-13 19:43:42,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=920, PETRI_PLACES=132, PETRI_TRANSITIONS=101} [2022-12-13 19:43:42,861 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 104 predicate places. [2022-12-13 19:43:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 101 transitions, 920 flow [2022-12-13 19:43:42,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 71.6875) internal successors, (1147), 16 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:42,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:43:42,862 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-13 19:43:42,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:43:43,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:43:43,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2022-12-13 19:43:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:43:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1909195751, now seen corresponding path program 3 times [2022-12-13 19:43:43,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:43:43,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096898753] [2022-12-13 19:43:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:43:43,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:43:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:43:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 19:43:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:43:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096898753] [2022-12-13 19:43:43,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096898753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:43:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660887823] [2022-12-13 19:43:43,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:43:43,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:43:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:43:43,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:43:43,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:43:43,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 19:43:43,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:43:43,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 19:43:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:43:43,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:43:43,467 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 19:43:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-12-13 19:43:43,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:43:43,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660887823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:43:43,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:43:43,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-12-13 19:43:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922084894] [2022-12-13 19:43:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:43:43,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:43:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:43:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:43:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:43:43,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 185 [2022-12-13 19:43:43,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 101 transitions, 920 flow. Second operand has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:43,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:43:43,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 185 [2022-12-13 19:43:43,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:43:44,540 INFO L130 PetriNetUnfolder]: 1937/3916 cut-off events. [2022-12-13 19:43:44,540 INFO L131 PetriNetUnfolder]: For 42195/42195 co-relation queries the response was YES. [2022-12-13 19:43:44,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20283 conditions, 3916 events. 1937/3916 cut-off events. For 42195/42195 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 20501 event pairs, 96 based on Foata normal form. 44/3960 useless extension candidates. Maximal degree in co-relation 20234. Up to 3514 conditions per place. [2022-12-13 19:43:44,564 INFO L137 encePairwiseOnDemand]: 180/185 looper letters, 0 selfloop transitions, 0 changer transitions 130/130 dead transitions. [2022-12-13 19:43:44,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 130 transitions, 1360 flow [2022-12-13 19:43:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:43:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:43:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 512 transitions. [2022-12-13 19:43:44,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46126126126126127 [2022-12-13 19:43:44,566 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 512 transitions. [2022-12-13 19:43:44,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 512 transitions. [2022-12-13 19:43:44,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:43:44,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 512 transitions. [2022-12-13 19:43:44,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:44,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:44,570 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:44,570 INFO L175 Difference]: Start difference. First operand has 132 places, 101 transitions, 920 flow. Second operand 6 states and 512 transitions. [2022-12-13 19:43:44,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 130 transitions, 1360 flow [2022-12-13 19:43:44,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 130 transitions, 1152 flow, removed 52 selfloop flow, removed 20 redundant places. [2022-12-13 19:43:44,597 INFO L231 Difference]: Finished difference. Result has 116 places, 0 transitions, 0 flow [2022-12-13 19:43:44,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=116, PETRI_TRANSITIONS=0} [2022-12-13 19:43:44,598 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 88 predicate places. [2022-12-13 19:43:44,598 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 0 transitions, 0 flow [2022-12-13 19:43:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (13 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-12-13 19:43:44,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-12-13 19:43:44,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-12-13 19:43:44,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2022-12-13 19:43:44,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-12-13 19:43:44,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-12-13 19:43:44,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 19:43:44,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:43:44,802 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 19:43:44,811 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 19:43:44,811 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 19:43:44,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 07:43:44 BasicIcfg [2022-12-13 19:43:44,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 19:43:44,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 19:43:44,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 19:43:44,814 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 19:43:44,814 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:43:23" (3/4) ... [2022-12-13 19:43:44,816 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 19:43:44,821 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-12-13 19:43:44,824 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-12-13 19:43:44,824 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 19:43:44,824 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 19:43:44,845 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 19:43:44,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 19:43:44,846 INFO L158 Benchmark]: Toolchain (without parser) took 22597.49ms. Allocated memory was 142.6MB in the beginning and 314.6MB in the end (delta: 172.0MB). Free memory was 105.3MB in the beginning and 109.8MB in the end (delta: -4.5MB). Peak memory consumption was 168.4MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,846 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:43:44,846 INFO L158 Benchmark]: CACSL2BoogieTranslator took 443.54ms. Allocated memory is still 142.6MB. Free memory was 105.3MB in the beginning and 77.9MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,846 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.16ms. Allocated memory is still 142.6MB. Free memory was 77.9MB in the beginning and 75.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,847 INFO L158 Benchmark]: Boogie Preprocessor took 19.79ms. Allocated memory is still 142.6MB. Free memory was 75.4MB in the beginning and 73.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,847 INFO L158 Benchmark]: RCFGBuilder took 314.34ms. Allocated memory is still 142.6MB. Free memory was 73.8MB in the beginning and 112.5MB in the end (delta: -38.6MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,847 INFO L158 Benchmark]: TraceAbstraction took 21751.34ms. Allocated memory was 142.6MB in the beginning and 314.6MB in the end (delta: 172.0MB). Free memory was 111.8MB in the beginning and 112.5MB in the end (delta: -703.1kB). Peak memory consumption was 246.1MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,847 INFO L158 Benchmark]: Witness Printer took 31.82ms. Allocated memory is still 314.6MB. Free memory was 112.5MB in the beginning and 109.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:43:44,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 443.54ms. Allocated memory is still 142.6MB. Free memory was 105.3MB in the beginning and 77.9MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.16ms. Allocated memory is still 142.6MB. Free memory was 77.9MB in the beginning and 75.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.79ms. Allocated memory is still 142.6MB. Free memory was 75.4MB in the beginning and 73.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 314.34ms. Allocated memory is still 142.6MB. Free memory was 73.8MB in the beginning and 112.5MB in the end (delta: -38.6MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. * TraceAbstraction took 21751.34ms. Allocated memory was 142.6MB in the beginning and 314.6MB in the end (delta: 172.0MB). Free memory was 111.8MB in the beginning and 112.5MB in the end (delta: -703.1kB). Peak memory consumption was 246.1MB. Max. memory is 16.1GB. * Witness Printer took 31.82ms. Allocated memory is still 314.6MB. Free memory was 112.5MB in the beginning and 109.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 89 PlacesBefore, 28 PlacesAfterwards, 91 TransitionsBefore, 27 TransitionsAfterwards, 1960 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 93 TotalNumberOfCompositions, 2707 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1846, independent: 1759, independent conditional: 0, independent unconditional: 1759, dependent: 87, dependent conditional: 0, dependent unconditional: 87, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1077, independent: 1053, independent conditional: 0, independent unconditional: 1053, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1846, independent: 706, independent conditional: 0, independent unconditional: 706, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 1077, unknown conditional: 0, unknown unconditional: 1077] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, 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: 932]: 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 - 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, 115 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: 21.7s, OverallIterations: 16, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3977 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3465 mSDsluCounter, 1562 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1446 mSDsCounter, 182 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8435 IncrementalHoareTripleChecker+Invalid, 8617 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 182 mSolverCounterUnsat, 116 mSDtfsCounter, 8435 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 526 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=920occurred in iteration=15, InterpolantAutomatonStates: 130, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 579 NumberOfCodeBlocks, 511 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 682 ConstructedInterpolants, 52 QuantifiedInterpolants, 6707 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1916 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 34 InterpolantComputations, 9 PerfectInterpolantSequences, 1753/2042 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 19:43:44,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15cf489-45a1-49fc-bc79-881494d86878/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