./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12_variant-2.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_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/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_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12_variant-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/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_a205adff-3dda-4a98-998f-708b0e2862ca/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 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:28:57,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:28:57,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:28:57,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:28:57,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:28:57,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:28:57,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:28:57,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:28:57,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:28:57,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:28:57,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:28:57,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:28:57,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:28:57,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:28:57,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:28:57,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:28:57,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:28:57,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:28:57,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:28:57,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:28:57,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:28:57,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:28:57,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:28:57,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:28:57,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:28:57,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:28:57,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:28:57,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:28:57,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:28:57,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:28:57,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:28:57,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:28:57,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:28:57,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:28:57,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:28:57,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:28:57,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:28:57,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:28:57,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:28:57,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:28:57,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:28:57,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:28:57,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:28:57,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:28:57,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:28:57,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:28:57,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:28:57,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:28:57,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:28:57,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:28:57,813 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:28:57,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:28:57,814 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:28:57,814 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:28:57,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:28:57,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:28:57,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:28:57,815 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:28:57,815 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:28:57,815 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:28:57,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:28:57,816 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:28:57,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:28:57,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:28:57,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:28:57,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:28:57,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:28:57,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:28:57,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:28:57,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:28:57,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:28:57,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:28:57,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:28:57,818 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:28:57,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:28:57,818 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:28:57,818 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_a205adff-3dda-4a98-998f-708b0e2862ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 [2022-12-13 22:28:58,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:28:58,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:28:58,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:28:58,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:28:58,030 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:28:58,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-lit/sssc12_variant-2.i [2022-12-13 22:29:00,596 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:29:00,825 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:29:00,825 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/sv-benchmarks/c/pthread-lit/sssc12_variant-2.i [2022-12-13 22:29:00,838 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/data/2f7fc676b/b4af91bac5b043f6995c36e4c198639c/FLAGbfdf30527 [2022-12-13 22:29:01,179 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/data/2f7fc676b/b4af91bac5b043f6995c36e4c198639c [2022-12-13 22:29:01,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:29:01,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:29:01,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:29:01,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:29:01,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:29:01,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c11881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01, skipping insertion in model container [2022-12-13 22:29:01,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:29:01,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:29:01,508 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/sv-benchmarks/c/pthread-lit/sssc12_variant-2.i[46865,46878] [2022-12-13 22:29:01,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:29:01,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:29:01,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:29:01,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:29:01,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:29:01,530 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:29:01,555 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/sv-benchmarks/c/pthread-lit/sssc12_variant-2.i[46865,46878] [2022-12-13 22:29:01,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:29:01,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:29:01,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:29:01,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:29:01,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:29:01,588 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:29:01,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01 WrapperNode [2022-12-13 22:29:01,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:29:01,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:29:01,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:29:01,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:29:01,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,620 INFO L138 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2022-12-13 22:29:01,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:29:01,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:29:01,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:29:01,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:29:01,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:29:01,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:29:01,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:29:01,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:29:01,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (1/1) ... [2022-12-13 22:29:01,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:29:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:29:01,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:29:01,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-12-13 22:29:01,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:29:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:29:01,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:29:01,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:29:01,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:29:01,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:29:01,699 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:29:01,798 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:29:01,800 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:29:01,976 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:29:02,000 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:29:02,000 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 22:29:02,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:29:02 BoogieIcfgContainer [2022-12-13 22:29:02,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:29:02,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:29:02,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:29:02,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:29:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:29:01" (1/3) ... [2022-12-13 22:29:02,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6621e969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:29:02, skipping insertion in model container [2022-12-13 22:29:02,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:01" (2/3) ... [2022-12-13 22:29:02,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6621e969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:29:02, skipping insertion in model container [2022-12-13 22:29:02,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:29:02" (3/3) ... [2022-12-13 22:29:02,009 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant-2.i [2022-12-13 22:29:02,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:29:02,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 22:29:02,024 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:29:02,094 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 22:29:02,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 100 transitions, 205 flow [2022-12-13 22:29:02,165 INFO L130 PetriNetUnfolder]: 7/117 cut-off events. [2022-12-13 22:29:02,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:02,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 7/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 158 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2022-12-13 22:29:02,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 100 transitions, 205 flow [2022-12-13 22:29:02,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 100 transitions, 205 flow [2022-12-13 22:29:02,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:29:02,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 100 transitions, 205 flow [2022-12-13 22:29:02,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 100 transitions, 205 flow [2022-12-13 22:29:02,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 100 transitions, 205 flow [2022-12-13 22:29:02,215 INFO L130 PetriNetUnfolder]: 7/117 cut-off events. [2022-12-13 22:29:02,215 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 7/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 158 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2022-12-13 22:29:02,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 1680 [2022-12-13 22:29:05,060 INFO L134 LiptonReduction]: Checked pairs total: 2419 [2022-12-13 22:29:05,060 INFO L136 LiptonReduction]: Total number of compositions: 106 [2022-12-13 22:29:05,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:29:05,075 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;@5f0ac9f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:29:05,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-12-13 22:29:05,076 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 22:29:05,076 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:05,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:05,077 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:29:05,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 15 more)] === [2022-12-13 22:29:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash 14462, now seen corresponding path program 1 times [2022-12-13 22:29:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273206932] [2022-12-13 22:29:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:05,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:05,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273206932] [2022-12-13 22:29:05,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273206932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:05,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:05,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:29:05,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791886794] [2022-12-13 22:29:05,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:05,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:05,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 206 [2022-12-13 22:29:05,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 47 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 22:29:05,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:05,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 206 [2022-12-13 22:29:05,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:05,428 INFO L130 PetriNetUnfolder]: 22/67 cut-off events. [2022-12-13 22:29:05,429 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:05,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 67 events. 22/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 234 event pairs, 18 based on Foata normal form. 4/43 useless extension candidates. Maximal degree in co-relation 110. Up to 53 conditions per place. [2022-12-13 22:29:05,430 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 11 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 22:29:05,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 16 transitions, 61 flow [2022-12-13 22:29:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-12-13 22:29:05,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4401294498381877 [2022-12-13 22:29:05,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-12-13 22:29:05,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-12-13 22:29:05,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:05,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-12-13 22:29:05,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,457 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 47 flow. Second operand 3 states and 272 transitions. [2022-12-13 22:29:05,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 16 transitions, 61 flow [2022-12-13 22:29:05,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 16 transitions, 61 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:29:05,460 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 39 flow [2022-12-13 22:29:05,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-13 22:29:05,464 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 22:29:05,465 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 39 flow [2022-12-13 22:29:05,465 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 22:29:05,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:05,465 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:29:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:29:05,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 15 more)] === [2022-12-13 22:29:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 14461, now seen corresponding path program 1 times [2022-12-13 22:29:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429190599] [2022-12-13 22:29:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429190599] [2022-12-13 22:29:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429190599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:05,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:05,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:29:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616421721] [2022-12-13 22:29:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:05,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:05,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 206 [2022-12-13 22:29:05,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:05,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 206 [2022-12-13 22:29:05,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:05,621 INFO L130 PetriNetUnfolder]: 15/49 cut-off events. [2022-12-13 22:29:05,621 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:05,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 49 events. 15/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 146 event pairs, 12 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 89. Up to 38 conditions per place. [2022-12-13 22:29:05,622 INFO L137 encePairwiseOnDemand]: 204/206 looper letters, 10 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 22:29:05,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 59 flow [2022-12-13 22:29:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2022-12-13 22:29:05,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368932038834951 [2022-12-13 22:29:05,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2022-12-13 22:29:05,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2022-12-13 22:29:05,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:05,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2022-12-13 22:29:05,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,626 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 39 flow. Second operand 3 states and 270 transitions. [2022-12-13 22:29:05,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 59 flow [2022-12-13 22:29:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 58 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:29:05,627 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2022-12-13 22:29:05,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 22:29:05,627 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 22:29:05,628 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2022-12-13 22:29:05,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:05,628 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:29:05,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:29:05,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 15 more)] === [2022-12-13 22:29:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:05,629 INFO L85 PathProgramCache]: Analyzing trace with hash 431095935, now seen corresponding path program 1 times [2022-12-13 22:29:05,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:05,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863693141] [2022-12-13 22:29:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:05,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:29:05,645 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:29:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:29:05,672 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:29:05,672 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:29:05,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2022-12-13 22:29:05,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2022-12-13 22:29:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2022-12-13 22:29:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (14 of 18 remaining) [2022-12-13 22:29:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 18 remaining) [2022-12-13 22:29:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2022-12-13 22:29:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2022-12-13 22:29:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2022-12-13 22:29:05,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2022-12-13 22:29:05,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2022-12-13 22:29:05,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2022-12-13 22:29:05,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (6 of 18 remaining) [2022-12-13 22:29:05,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2022-12-13 22:29:05,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2022-12-13 22:29:05,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2022-12-13 22:29:05,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2022-12-13 22:29:05,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2022-12-13 22:29:05,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 18 remaining) [2022-12-13 22:29:05,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:29:05,678 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 22:29:05,683 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 22:29:05,683 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 22:29:05,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 10:29:05 BasicIcfg [2022-12-13 22:29:05,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 22:29:05,699 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 22:29:05,699 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 22:29:05,699 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 22:29:05,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:29:02" (3/4) ... [2022-12-13 22:29:05,701 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 22:29:05,731 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 22:29:05,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 22:29:05,732 INFO L158 Benchmark]: Toolchain (without parser) took 4544.60ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 107.5MB in the beginning and 73.3MB in the end (delta: 34.2MB). Peak memory consumption was 67.5MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,732 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 140.5MB. Free memory is still 114.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 22:29:05,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.33ms. Allocated memory is still 140.5MB. Free memory was 107.3MB in the beginning and 78.5MB in the end (delta: 28.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,732 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.14ms. Allocated memory is still 140.5MB. Free memory was 78.5MB in the beginning and 76.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,733 INFO L158 Benchmark]: Boogie Preprocessor took 18.54ms. Allocated memory is still 140.5MB. Free memory was 76.0MB in the beginning and 74.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,733 INFO L158 Benchmark]: RCFGBuilder took 362.09ms. Allocated memory is still 140.5MB. Free memory was 74.3MB in the beginning and 58.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,733 INFO L158 Benchmark]: TraceAbstraction took 3695.05ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 57.1MB in the beginning and 76.4MB in the end (delta: -19.3MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,734 INFO L158 Benchmark]: Witness Printer took 32.16ms. Allocated memory is still 172.0MB. Free memory was 76.4MB in the beginning and 73.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 22:29:05,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 140.5MB. Free memory is still 114.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.33ms. Allocated memory is still 140.5MB. Free memory was 107.3MB in the beginning and 78.5MB in the end (delta: 28.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.14ms. Allocated memory is still 140.5MB. Free memory was 78.5MB in the beginning and 76.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.54ms. Allocated memory is still 140.5MB. Free memory was 76.0MB in the beginning and 74.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 362.09ms. Allocated memory is still 140.5MB. Free memory was 74.3MB in the beginning and 58.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3695.05ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 57.1MB in the beginning and 76.4MB in the end (delta: -19.3MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * Witness Printer took 32.16ms. Allocated memory is still 172.0MB. Free memory was 76.4MB in the beginning and 73.3MB in the end (delta: 3.1MB). 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: 2.9s, 97 PlacesBefore, 23 PlacesAfterwards, 100 TransitionsBefore, 21 TransitionsAfterwards, 1680 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 106 TotalNumberOfCompositions, 2419 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1638, independent: 1545, independent conditional: 0, independent unconditional: 1545, dependent: 93, dependent conditional: 0, dependent unconditional: 93, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 917, independent: 888, independent conditional: 0, independent unconditional: 888, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1638, independent: 657, independent conditional: 0, independent unconditional: 657, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 917, unknown conditional: 0, unknown unconditional: 917] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1005] 0 int *data; [L1006] 0 volatile int len; [L1007] 0 volatile int next; [L1008] 0 volatile int lock; [L1040] 0 pthread_t t; [L1041] 0 lock=0 [L1042] 0 next = 0 [L1043] 0 len = __VERIFIER_nondet_int() [L1044] CALL 0 assume_abort_if_not(len > 0) [L994] COND FALSE 0 !(!cond) [L1044] RET 0 assume_abort_if_not(len > 0) [L1045] 0 data = malloc(sizeof(int) * len) [L1046] COND TRUE 0 1 [L1047] FCALL, FORK 0 pthread_create(&t, 0, thr, 0) VAL [\old(argc)=1073741828, argc=1073741828, argv={1073741826:1073741825}, argv={1073741826:1073741825}, data={-2:0}, len=1073741824, lock=0, next=0, pthread_create(&t, 0, thr, 0)=-1, t={3:0}] [L1022] 1 int c, end; [L1023] 1 c = 0 [L1024] 1 end = 0 [L1025] CALL 1 acquire() [L1011] CALL 1 assume_abort_if_not(lock == 0) [L994] COND FALSE 1 !(!cond) [L1011] RET 1 assume_abort_if_not(lock == 0) [L1012] 1 lock = 1 [L1025] RET 1 acquire() [L1026] COND TRUE 1 next + 10 <= len [L1027] 1 c = next [L1028] EXPR 1 end = next + 10 [L1028] 1 next = end = next + 10 [L1030] CALL 1 release() [L1017] CALL 1 assume_abort_if_not(lock == 1) [L994] COND FALSE 1 !(!cond) [L1017] RET 1 assume_abort_if_not(lock == 1) [L1018] 1 lock = 0 [L1030] RET 1 release() [L1031] COND TRUE 1 c < end [L1032] 1 data[c] = 0 - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 134 locations, 18 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: 3.6s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 84 IncrementalHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 0 mSDtfsCounter, 84 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! [2022-12-13 22:29:05,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a205adff-3dda-4a98-998f-708b0e2862ca/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)