./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:43:39,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:43:39,188 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:43:39,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:43:39,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:43:39,230 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:43:39,230 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:43:39,231 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:43:39,232 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:43:39,232 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:43:39,233 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:43:39,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:43:39,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:43:39,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:43:39,236 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:43:39,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:43:39,237 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:43:39,237 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:43:39,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:43:39,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:43:39,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:43:39,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:43:39,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:43:39,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:43:39,244 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:43:39,244 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:43:39,245 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:43:39,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:43:39,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:43:39,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:43:39,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:43:39,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:39,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:43:39,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:43:39,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:43:39,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:43:39,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:43:39,249 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:43:39,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:43:39,250 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:43:39,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:43:39,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:43:39,250 INFO L153 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_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2023-11-26 10:43:39,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:43:39,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:43:39,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:43:39,639 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:43:39,640 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:43:39,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-11-26 10:43:42,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:43:43,049 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:43:43,052 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-11-26 10:43:43,080 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/data/97f94350b/b28fb6be796f4f1cae15bff635de1ec3/FLAG8ab971298 [2023-11-26 10:43:43,097 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/data/97f94350b/b28fb6be796f4f1cae15bff635de1ec3 [2023-11-26 10:43:43,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:43:43,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:43:43,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:43,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:43:43,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:43:43,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61133f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43, skipping insertion in model container [2023-11-26 10:43:43,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,182 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:43:43,531 WARN L240 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_9f7b8422-14c0-448c-8467-ac18855af07f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2023-11-26 10:43:43,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:43,572 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:43:43,679 WARN L240 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_9f7b8422-14c0-448c-8467-ac18855af07f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2023-11-26 10:43:43,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:43,753 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:43:43,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43 WrapperNode [2023-11-26 10:43:43,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:43,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:43,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:43:43,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:43:43,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,827 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-11-26 10:43:43,827 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:43,828 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:43:43,828 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:43:43,828 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:43:43,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,845 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,879 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 18, 8, 6, 8]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1, 0]. The 10 writes are split as follows [0, 7, 1, 1, 1]. [2023-11-26 10:43:43,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,910 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:43:43,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:43:43,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:43:43,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:43:43,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (1/1) ... [2023-11-26 10:43:43,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:43,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:43:43,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:43:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-26 10:43:43,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-26 10:43:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:43:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:43:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:43:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:43:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 10:43:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 10:43:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 10:43:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-11-26 10:43:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-11-26 10:43:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:43:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 10:43:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 10:43:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 10:43:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-26 10:43:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-26 10:43:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-11-26 10:43:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-11-26 10:43:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:43:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:43:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:43:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:43:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:43:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-11-26 10:43:43,985 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-11-26 10:43:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:43:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:43:44,164 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:43:44,166 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:43:44,514 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:43:44,557 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:43:44,557 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-26 10:43:44,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:44 BoogieIcfgContainer [2023-11-26 10:43:44,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:43:44,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:43:44,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:43:44,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:43:44,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:43:43" (1/3) ... [2023-11-26 10:43:44,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc9ed07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:44, skipping insertion in model container [2023-11-26 10:43:44,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:43" (2/3) ... [2023-11-26 10:43:44,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc9ed07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:44, skipping insertion in model container [2023-11-26 10:43:44,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:44" (3/3) ... [2023-11-26 10:43:44,566 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2023-11-26 10:43:44,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:43:44,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:43:44,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:44,643 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@560562e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:44,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:43:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 77 states have internal predecessors, (120), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-26 10:43:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 10:43:44,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:44,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:44,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:44,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1056251351, now seen corresponding path program 1 times [2023-11-26 10:43:44,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:44,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19309732] [2023-11-26 10:43:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:44,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:44,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:44,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19309732] [2023-11-26 10:43:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19309732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:44,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:44,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103764216] [2023-11-26 10:43:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:44,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:43:44,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:44,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:43:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:43:44,927 INFO L87 Difference]: Start difference. First operand has 90 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 77 states have internal predecessors, (120), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:45,016 INFO L93 Difference]: Finished difference Result 177 states and 315 transitions. [2023-11-26 10:43:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:43:45,018 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 10:43:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:45,027 INFO L225 Difference]: With dead ends: 177 [2023-11-26 10:43:45,028 INFO L226 Difference]: Without dead ends: 84 [2023-11-26 10:43:45,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:43:45,045 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:45,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:43:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-26 10:43:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-26 10:43:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 72 states have internal predecessors, (79), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:43:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2023-11-26 10:43:45,105 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 14 [2023-11-26 10:43:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2023-11-26 10:43:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2023-11-26 10:43:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:43:45,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:45,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:45,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:43:45,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:43:45,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1761441640, now seen corresponding path program 1 times [2023-11-26 10:43:45,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:45,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099917517] [2023-11-26 10:43:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:45,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:43:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:46,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 10:43:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:46,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:46,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099917517] [2023-11-26 10:43:46,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099917517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881718803] [2023-11-26 10:43:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:46,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:46,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:46,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:46,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:46,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 10:43:46,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:46,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:46,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-26 10:43:46,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-26 10:43:46,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-26 10:43:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:46,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:46,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-11-26 10:43:47,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 10:43:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881718803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:47,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15 [2023-11-26 10:43:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698488755] [2023-11-26 10:43:47,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:47,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:43:47,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:43:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:43:47,143 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 10:43:51,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:43:55,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:43:59,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:03,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:07,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:11,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:12,273 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2023-11-26 10:44:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:44:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-11-26 10:44:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:12,278 INFO L225 Difference]: With dead ends: 109 [2023-11-26 10:44:12,278 INFO L226 Difference]: Without dead ends: 106 [2023-11-26 10:44:12,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:44:12,280 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 225 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 54 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:12,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 348 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 549 Invalid, 6 Unknown, 0 Unchecked, 24.7s Time] [2023-11-26 10:44:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-26 10:44:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-11-26 10:44:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 86 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:44:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-11-26 10:44:12,327 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 27 [2023-11-26 10:44:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:12,328 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-11-26 10:44:12,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 13 states have internal predecessors, (38), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 10:44:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-11-26 10:44:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:44:12,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:12,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:12,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:44:12,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 10:44:12,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:12,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash -535177918, now seen corresponding path program 1 times [2023-11-26 10:44:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756479523] [2023-11-26 10:44:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:44:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:13,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 10:44:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:13,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756479523] [2023-11-26 10:44:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756479523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:13,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441680004] [2023-11-26 10:44:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:13,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:13,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:13,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:13,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:13,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 10:44:13,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:13,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:44:13,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-26 10:44:13,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-26 10:44:13,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-26 10:44:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:13,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-11-26 10:44:13,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 10:44:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:44:13,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441680004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:13,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 15 [2023-11-26 10:44:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737661267] [2023-11-26 10:44:13,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:44:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:44:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:44:13,888 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 10:44:17,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:21,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:25,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:30,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:34,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:44:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:44:34,949 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2023-11-26 10:44:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:44:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-11-26 10:44:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:44:34,951 INFO L225 Difference]: With dead ends: 112 [2023-11-26 10:44:34,951 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 10:44:34,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-11-26 10:44:34,953 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 221 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 52 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:44:34,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 408 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 671 Invalid, 5 Unknown, 0 Unchecked, 20.7s Time] [2023-11-26 10:44:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 10:44:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-11-26 10:44:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.225) internal successors, (98), 89 states have internal predecessors, (98), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:44:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2023-11-26 10:44:34,979 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 29 [2023-11-26 10:44:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:44:34,980 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2023-11-26 10:44:34,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 10:44:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2023-11-26 10:44:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:44:34,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:44:34,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:44:34,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:35,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:35,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:44:35,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1995234094, now seen corresponding path program 1 times [2023-11-26 10:44:35,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763669498] [2023-11-26 10:44:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:35,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:35,293 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:44:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:35,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:44:35,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:44:35,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 10:44:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:44:35,380 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:44:35,385 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:44:35,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:44:35 BoogieIcfgContainer [2023-11-26 10:44:35,447 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:44:35,447 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:44:35,448 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:44:35,448 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:44:35,448 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:44" (3/4) ... [2023-11-26 10:44:35,449 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 10:44:35,527 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 10:44:35,527 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:44:35,528 INFO L158 Benchmark]: Toolchain (without parser) took 52425.71ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 122.3MB in the beginning and 131.3MB in the end (delta: -9.0MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2023-11-26 10:44:35,531 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:44:35,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 648.92ms. Allocated memory is still 157.3MB. Free memory was 122.3MB in the beginning and 121.7MB in the end (delta: 552.8kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-26 10:44:35,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.66ms. Allocated memory is still 157.3MB. Free memory was 121.7MB in the beginning and 119.6MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:44:35,533 INFO L158 Benchmark]: Boogie Preprocessor took 88.26ms. Allocated memory is still 157.3MB. Free memory was 119.6MB in the beginning and 114.1MB in the end (delta: 5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 10:44:35,533 INFO L158 Benchmark]: RCFGBuilder took 640.65ms. Allocated memory is still 157.3MB. Free memory was 114.1MB in the beginning and 86.8MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-26 10:44:35,533 INFO L158 Benchmark]: TraceAbstraction took 50887.06ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 86.2MB in the beginning and 134.5MB in the end (delta: -48.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:44:35,534 INFO L158 Benchmark]: Witness Printer took 79.69ms. Allocated memory is still 188.7MB. Free memory was 134.5MB in the beginning and 131.3MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 10:44:35,539 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 648.92ms. Allocated memory is still 157.3MB. Free memory was 122.3MB in the beginning and 121.7MB in the end (delta: 552.8kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.66ms. Allocated memory is still 157.3MB. Free memory was 121.7MB in the beginning and 119.6MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 88.26ms. Allocated memory is still 157.3MB. Free memory was 119.6MB in the beginning and 114.1MB in the end (delta: 5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 640.65ms. Allocated memory is still 157.3MB. Free memory was 114.1MB in the beginning and 86.8MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 50887.06ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 86.2MB in the beginning and 134.5MB in the end (delta: -48.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 79.69ms. Allocated memory is still 188.7MB. Free memory was 134.5MB in the beginning and 131.3MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); [L588] struct node *list = ((void *)0); [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-1:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L590] RET chain_node(&list) VAL [list={6:0}, pp1={3:0}, pp1={3:0}, pp2={5:0}, pp2={5:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-2:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L597] RET chain_node(&list) VAL [list={6:0}, pp1={3:0}, pp1={3:0}, pp2={5:0}, pp2={5:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) [L642] CALL check_seq_next(p1, p2) VAL [beg={-1:0}, end={-1:0}] [L626] COND FALSE !(!(beg)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L627] COND FALSE !(!(end)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] COND TRUE !(beg) VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 90 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 50.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 46.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 454 SdHoareTripleChecker+Valid, 45.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 446 mSDsluCounter, 861 SdHoareTripleChecker+Invalid, 45.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 664 mSDsCounter, 106 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1224 IncrementalHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 106 mSolverCounterUnsat, 197 mSDtfsCounter, 1224 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=3, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 8 QuantifiedInterpolants, 1424 SizeOfPredicates, 34 NumberOfNonLiveVariables, 656 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 6/24 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! [2023-11-26 10:44:35,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7b8422-14c0-448c-8467-ac18855af07f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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