./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0237.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0237.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:50:13,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:50:14,001 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 04:50:14,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:50:14,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:50:14,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:50:14,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:50:14,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:50:14,037 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:50:14,037 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:50:14,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:50:14,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:50:14,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:50:14,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:50:14,040 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:50:14,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:50:14,041 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:50:14,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:50:14,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:50:14,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:50:14,043 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:50:14,044 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:50:14,044 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:50:14,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:50:14,045 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:50:14,045 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:50:14,046 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:50:14,046 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:50:14,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:50:14,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:50:14,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:50:14,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:50:14,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:50:14,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:50:14,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:50:14,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:50:14,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:50:14,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:50:14,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:50:14,050 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:50:14,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:50:14,050 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_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea [2023-11-29 04:50:14,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:50:14,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:50:14,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:50:14,297 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:50:14,297 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:50:14,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety/test-0237.i [2023-11-29 04:50:16,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:50:17,256 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:50:17,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/sv-benchmarks/c/memsafety/test-0237.i [2023-11-29 04:50:17,273 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/data/d8692ccd7/5158d3c21894405cbad3d04d37f75cdd/FLAG38dd39568 [2023-11-29 04:50:17,288 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/data/d8692ccd7/5158d3c21894405cbad3d04d37f75cdd [2023-11-29 04:50:17,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:50:17,292 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:50:17,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:50:17,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:50:17,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:50:17,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a852419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17, skipping insertion in model container [2023-11-29 04:50:17,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:50:17,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:50:17,716 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:50:17,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:50:17,801 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:50:17,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17 WrapperNode [2023-11-29 04:50:17,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:50:17,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:50:17,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:50:17,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:50:17,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,827 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,856 INFO L138 Inliner]: procedures = 188, calls = 66, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 221 [2023-11-29 04:50:17,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:50:17,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:50:17,857 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:50:17,857 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:50:17,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,874 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,904 INFO L175 MemorySlicer]: Split 38 memory accesses to 3 slices as follows [32, 2, 4]. 84 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [0, 2, 1]. The 18 writes are split as follows [17, 0, 1]. [2023-11-29 04:50:17,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,916 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,929 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:50:17,930 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:50:17,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:50:17,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:50:17,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (1/1) ... [2023-11-29 04:50:17,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:50:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:17,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:50:17,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:50:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:50:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:50:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 04:50:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 04:50:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 04:50:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 04:50:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 04:50:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 04:50:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-29 04:50:17,990 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-29 04:50:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:50:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 04:50:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 04:50:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 04:50:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:50:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:50:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:50:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:50:17,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:50:18,115 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:50:18,117 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:50:18,542 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:50:18,600 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:50:18,601 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 04:50:18,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:50:18 BoogieIcfgContainer [2023-11-29 04:50:18,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:50:18,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:50:18,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:50:18,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:50:18,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:50:17" (1/3) ... [2023-11-29 04:50:18,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45524e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:50:18, skipping insertion in model container [2023-11-29 04:50:18,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:50:17" (2/3) ... [2023-11-29 04:50:18,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45524e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:50:18, skipping insertion in model container [2023-11-29 04:50:18,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:50:18" (3/3) ... [2023-11-29 04:50:18,609 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0237.i [2023-11-29 04:50:18,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:50:18,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-29 04:50:18,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:50:18,669 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;@1193899d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:50:18,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-29 04:50:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 171 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-29 04:50:18,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:18,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-29 04:50:18,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:18,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash 393206, now seen corresponding path program 1 times [2023-11-29 04:50:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:18,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254561445] [2023-11-29 04:50:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:18,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:18,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254561445] [2023-11-29 04:50:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254561445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:18,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:18,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:50:18,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590882509] [2023-11-29 04:50:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:18,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:50:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:50:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:50:18,845 INFO L87 Difference]: Start difference. First operand has 179 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 171 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-29 04:50:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:18,915 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2023-11-29 04:50:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:50:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) Word has length 3 [2023-11-29 04:50:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:18,926 INFO L225 Difference]: With dead ends: 179 [2023-11-29 04:50:18,926 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 04:50:18,928 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 [2023-11-29 04:50:18,931 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:18,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:50:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 04:50:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2023-11-29 04:50:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2023-11-29 04:50:18,978 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 3 [2023-11-29 04:50:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:18,978 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2023-11-29 04:50:18,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-29 04:50:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2023-11-29 04:50:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 04:50:18,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:18,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 04:50:18,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:50:18,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:18,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 373275465, now seen corresponding path program 1 times [2023-11-29 04:50:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:18,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579471940] [2023-11-29 04:50:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:18,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:18,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195595946] [2023-11-29 04:50:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:18,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:19,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:19,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:50:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:19,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:50:19,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:19,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 04:50:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:19,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:19,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:19,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579471940] [2023-11-29 04:50:19,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195595946] [2023-11-29 04:50:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195595946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:50:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732006711] [2023-11-29 04:50:19,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:19,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:50:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:50:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:50:19,166 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:19,315 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2023-11-29 04:50:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:50:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 04:50:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:19,318 INFO L225 Difference]: With dead ends: 177 [2023-11-29 04:50:19,318 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 04:50:19,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:50:19,320 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:19,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 270 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:50:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 04:50:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2023-11-29 04:50:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 84 states have (on average 2.142857142857143) internal successors, (180), 169 states have internal predecessors, (180), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 192 transitions. [2023-11-29 04:50:19,334 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 192 transitions. Word has length 5 [2023-11-29 04:50:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:19,335 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 192 transitions. [2023-11-29 04:50:19,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 192 transitions. [2023-11-29 04:50:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 04:50:19,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:19,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 04:50:19,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:50:19,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:19,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:19,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:19,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1313362439, now seen corresponding path program 1 times [2023-11-29 04:50:19,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:19,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342302902] [2023-11-29 04:50:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:19,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:19,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:19,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254300128] [2023-11-29 04:50:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:19,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:19,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:19,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:50:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:19,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:50:19,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:19,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 04:50:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:19,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342302902] [2023-11-29 04:50:19,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254300128] [2023-11-29 04:50:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254300128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:19,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:50:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621214498] [2023-11-29 04:50:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:19,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:50:19,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:50:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:50:19,729 INFO L87 Difference]: Start difference. First operand 177 states and 192 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:19,914 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2023-11-29 04:50:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:50:19,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 04:50:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:19,917 INFO L225 Difference]: With dead ends: 184 [2023-11-29 04:50:19,917 INFO L226 Difference]: Without dead ends: 184 [2023-11-29 04:50:19,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:19,918 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 9 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:19,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 441 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:50:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-29 04:50:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-29 04:50:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 90 states have (on average 2.077777777777778) internal successors, (187), 175 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2023-11-29 04:50:19,934 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 6 [2023-11-29 04:50:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:19,934 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2023-11-29 04:50:19,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:50:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2023-11-29 04:50:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 04:50:19,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:19,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:19,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:50:20,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:20,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:20,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1870860128, now seen corresponding path program 1 times [2023-11-29 04:50:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:20,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612120123] [2023-11-29 04:50:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:20,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:20,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:20,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555296663] [2023-11-29 04:50:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:20,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:20,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:20,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:50:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:20,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:50:20,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:20,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:50:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:50:20,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:20,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612120123] [2023-11-29 04:50:20,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555296663] [2023-11-29 04:50:20,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555296663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:20,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:20,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:50:20,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085882694] [2023-11-29 04:50:20,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:20,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:50:20,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:50:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:50:20,360 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 04:50:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:20,528 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2023-11-29 04:50:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:50:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 04:50:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:20,530 INFO L225 Difference]: With dead ends: 191 [2023-11-29 04:50:20,530 INFO L226 Difference]: Without dead ends: 191 [2023-11-29 04:50:20,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:20,532 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 9 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:20,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 440 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:50:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-29 04:50:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-29 04:50:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 181 states have internal predecessors, (194), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2023-11-29 04:50:20,543 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 16 [2023-11-29 04:50:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:20,543 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2023-11-29 04:50:20,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 04:50:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2023-11-29 04:50:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 04:50:20,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:20,546 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:20,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:50:20,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:20,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:20,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1135831092, now seen corresponding path program 1 times [2023-11-29 04:50:20,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:20,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180591312] [2023-11-29 04:50:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:20,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:20,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:20,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591059026] [2023-11-29 04:50:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:20,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:20,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:20,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:20,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:50:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:20,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:50:20,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:21,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-11-29 04:50:21,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 11 [2023-11-29 04:50:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 04:50:21,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:21,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180591312] [2023-11-29 04:50:21,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591059026] [2023-11-29 04:50:21,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591059026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:21,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:21,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:50:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219963239] [2023-11-29 04:50:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:50:21,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:50:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:21,262 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:50:25,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:50:29,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:50:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:29,747 INFO L93 Difference]: Finished difference Result 203 states and 218 transitions. [2023-11-29 04:50:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:50:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2023-11-29 04:50:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:29,749 INFO L225 Difference]: With dead ends: 203 [2023-11-29 04:50:29,749 INFO L226 Difference]: Without dead ends: 194 [2023-11-29 04:50:29,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:50:29,750 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 4 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:29,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 591 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2023-11-29 04:50:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-29 04:50:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-11-29 04:50:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 184 states have internal predecessors, (197), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 209 transitions. [2023-11-29 04:50:29,760 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 209 transitions. Word has length 55 [2023-11-29 04:50:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:29,760 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 209 transitions. [2023-11-29 04:50:29,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 04:50:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 209 transitions. [2023-11-29 04:50:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 04:50:29,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:29,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:29,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:50:29,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:29,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:29,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1413279444, now seen corresponding path program 1 times [2023-11-29 04:50:29,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:29,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264983919] [2023-11-29 04:50:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:29,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:29,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156612403] [2023-11-29 04:50:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:29,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:29,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:30,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:50:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:30,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 04:50:30,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:30,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:50:30,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2023-11-29 04:50:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 86 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 04:50:30,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-29 04:50:30,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:30,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264983919] [2023-11-29 04:50:30,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:30,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156612403] [2023-11-29 04:50:30,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156612403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:30,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:30,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-29 04:50:30,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722497655] [2023-11-29 04:50:30,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:30,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:50:30,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:50:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:50:30,735 INFO L87 Difference]: Start difference. First operand 194 states and 209 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 04:50:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:31,197 INFO L93 Difference]: Finished difference Result 216 states and 233 transitions. [2023-11-29 04:50:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:50:31,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2023-11-29 04:50:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:31,199 INFO L225 Difference]: With dead ends: 216 [2023-11-29 04:50:31,200 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 04:50:31,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:50:31,201 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 22 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:31,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 866 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:50:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 04:50:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-11-29 04:50:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.9245283018867925) internal successors, (204), 191 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 216 transitions. [2023-11-29 04:50:31,210 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 216 transitions. Word has length 60 [2023-11-29 04:50:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:31,210 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 216 transitions. [2023-11-29 04:50:31,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 04:50:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 216 transitions. [2023-11-29 04:50:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 04:50:31,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:31,213 INFO L195 NwaCegarLoop]: trace histogram [18, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:31,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:50:31,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:50:31,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:31,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2062793804, now seen corresponding path program 2 times [2023-11-29 04:50:31,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:31,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220991639] [2023-11-29 04:50:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:31,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:31,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:31,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503176702] [2023-11-29 04:50:31,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:50:31,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:31,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:31,466 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:31,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:50:32,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:50:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:32,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:50:32,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:32,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:50:32,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2023-11-29 04:50:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 87 proven. 3 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-11-29 04:50:32,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-29 04:50:32,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220991639] [2023-11-29 04:50:32,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503176702] [2023-11-29 04:50:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503176702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:32,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 04:50:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743636049] [2023-11-29 04:50:32,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:32,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:50:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:32,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:50:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:50:32,707 INFO L87 Difference]: Start difference. First operand 201 states and 216 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 04:50:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:33,168 INFO L93 Difference]: Finished difference Result 221 states and 240 transitions. [2023-11-29 04:50:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:50:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2023-11-29 04:50:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:33,170 INFO L225 Difference]: With dead ends: 221 [2023-11-29 04:50:33,170 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 04:50:33,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:50:33,171 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 15 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:33,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1068 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:50:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 04:50:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-29 04:50:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 114 states have (on average 1.8596491228070176) internal successors, (212), 199 states have internal predecessors, (212), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 224 transitions. [2023-11-29 04:50:33,178 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 224 transitions. Word has length 73 [2023-11-29 04:50:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:33,179 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 224 transitions. [2023-11-29 04:50:33,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-29 04:50:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 224 transitions. [2023-11-29 04:50:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 04:50:33,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:33,181 INFO L195 NwaCegarLoop]: trace histogram [30, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:33,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 04:50:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:33,385 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:33,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash -314222900, now seen corresponding path program 3 times [2023-11-29 04:50:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285616870] [2023-11-29 04:50:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:33,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287468490] [2023-11-29 04:50:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:50:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:33,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:33,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:50:33,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:50:33,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:33,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:50:33,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:33,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 04:50:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2023-11-29 04:50:33,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:50:33,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:33,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285616870] [2023-11-29 04:50:33,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:33,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287468490] [2023-11-29 04:50:33,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287468490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:50:33,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:50:33,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:50:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075459338] [2023-11-29 04:50:33,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:50:33,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:50:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:50:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:50:33,681 INFO L87 Difference]: Start difference. First operand 209 states and 224 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 04:50:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:33,851 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2023-11-29 04:50:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:50:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 85 [2023-11-29 04:50:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:33,854 INFO L225 Difference]: With dead ends: 208 [2023-11-29 04:50:33,854 INFO L226 Difference]: Without dead ends: 208 [2023-11-29 04:50:33,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:50:33,855 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 9 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:33,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 419 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:50:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-29 04:50:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-29 04:50:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 114 states have (on average 1.8508771929824561) internal successors, (211), 198 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2023-11-29 04:50:33,863 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 85 [2023-11-29 04:50:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:33,863 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2023-11-29 04:50:33,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-29 04:50:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2023-11-29 04:50:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 04:50:33,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:33,881 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:33,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:50:34,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 04:50:34,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:34,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1326519086, now seen corresponding path program 1 times [2023-11-29 04:50:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:34,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343512044] [2023-11-29 04:50:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:34,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502396230] [2023-11-29 04:50:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:34,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:34,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:34,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:50:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:34,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:50:34,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:34,571 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-29 04:50:34,609 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 04:50:34,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 04:50:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 437 proven. 1 refuted. 0 times theorem prover too weak. 460 trivial. 53 not checked. [2023-11-29 04:50:34,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:34,854 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:50:34,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-29 04:50:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 437 proven. 54 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2023-11-29 04:50:34,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343512044] [2023-11-29 04:50:34,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502396230] [2023-11-29 04:50:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502396230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:34,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:34,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-11-29 04:50:34,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747953017] [2023-11-29 04:50:34,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:34,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:50:34,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:50:34,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-29 04:50:34,879 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 04:50:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:35,473 INFO L93 Difference]: Finished difference Result 204 states and 219 transitions. [2023-11-29 04:50:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:50:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-29 04:50:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:35,479 INFO L225 Difference]: With dead ends: 204 [2023-11-29 04:50:35,479 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 04:50:35,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-11-29 04:50:35,480 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 24 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:35,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1012 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 794 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2023-11-29 04:50:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 04:50:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-29 04:50:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 114 states have (on average 1.8157894736842106) internal successors, (207), 194 states have internal predecessors, (207), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2023-11-29 04:50:35,487 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 96 [2023-11-29 04:50:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:35,487 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2023-11-29 04:50:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 04:50:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2023-11-29 04:50:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 04:50:35,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:35,489 INFO L195 NwaCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:35,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:50:35,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:35,693 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:35,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:35,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1326519087, now seen corresponding path program 1 times [2023-11-29 04:50:35,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:35,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755927582] [2023-11-29 04:50:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:35,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:35,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:35,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468556087] [2023-11-29 04:50:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:35,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:35,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:50:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:50:38,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 04:50:38,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:38,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:50:38,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2023-11-29 04:50:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 458 proven. 78 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-29 04:50:38,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:50:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 54 proven. 237 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2023-11-29 04:50:38,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:50:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755927582] [2023-11-29 04:50:38,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:50:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468556087] [2023-11-29 04:50:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468556087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:50:38,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:50:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2023-11-29 04:50:38,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693040447] [2023-11-29 04:50:38,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:50:38,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:50:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:50:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:50:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:50:38,854 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 04:50:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:50:40,382 INFO L93 Difference]: Finished difference Result 232 states and 255 transitions. [2023-11-29 04:50:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:50:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 96 [2023-11-29 04:50:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:50:40,384 INFO L225 Difference]: With dead ends: 232 [2023-11-29 04:50:40,384 INFO L226 Difference]: Without dead ends: 217 [2023-11-29 04:50:40,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 04:50:40,386 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 47 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2546 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:50:40,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2546 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:50:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-29 04:50:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-11-29 04:50:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 127 states have (on average 1.7322834645669292) internal successors, (220), 207 states have internal predecessors, (220), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:50:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 232 transitions. [2023-11-29 04:50:40,394 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 232 transitions. Word has length 96 [2023-11-29 04:50:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:50:40,394 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 232 transitions. [2023-11-29 04:50:40,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 04:50:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 232 transitions. [2023-11-29 04:50:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 04:50:40,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:50:40,397 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:50:40,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:50:40,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:40,601 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:50:40,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:50:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1939697981, now seen corresponding path program 2 times [2023-11-29 04:50:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:50:40,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689978377] [2023-11-29 04:50:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:50:40,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:50:40,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:50:40,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28579773] [2023-11-29 04:50:40,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:50:40,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:50:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:50:40,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:50:40,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:50:46,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:50:46,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:50:46,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 89 conjunts are in the unsatisfiable core [2023-11-29 04:50:46,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:50:46,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:51:03,775 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:51:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:51:03,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:51:03,890 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:51:03,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 04:51:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1080 proven. 573 refuted. 0 times theorem prover too weak. 748 trivial. 317 not checked. [2023-11-29 04:51:03,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:04,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689978377] [2023-11-29 04:51:04,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:51:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28579773] [2023-11-29 04:51:04,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28579773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:04,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:51:04,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-11-29 04:51:04,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637947756] [2023-11-29 04:51:04,120 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 04:51:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 04:51:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=4, NotChecked=68, Total=1332 [2023-11-29 04:51:04,122 INFO L87 Difference]: Start difference. First operand 217 states and 232 transitions. Second operand has 35 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:51:08,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:12,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:16,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:20,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:28,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:32,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:36,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:40,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:44,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:51:53,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:01,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:05,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:09,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:13,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:17,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:21,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:25,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:30,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:52:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:52:32,418 INFO L93 Difference]: Finished difference Result 221 states and 241 transitions. [2023-11-29 04:52:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:52:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 127 [2023-11-29 04:52:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:52:32,422 INFO L225 Difference]: With dead ends: 221 [2023-11-29 04:52:32,422 INFO L226 Difference]: Without dead ends: 221 [2023-11-29 04:52:32,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=216, Invalid=2537, Unknown=7, NotChecked=102, Total=2862 [2023-11-29 04:52:32,423 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 43 mSDsluCounter, 2421 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 9 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 74.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:52:32,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2567 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2171 Invalid, 18 Unknown, 255 Unchecked, 74.3s Time] [2023-11-29 04:52:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-29 04:52:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2023-11-29 04:52:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 127 states have (on average 1.7007874015748032) internal successors, (216), 203 states have internal predecessors, (216), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:52:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 228 transitions. [2023-11-29 04:52:32,431 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 228 transitions. Word has length 127 [2023-11-29 04:52:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:52:32,432 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 228 transitions. [2023-11-29 04:52:32,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:52:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 228 transitions. [2023-11-29 04:52:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 04:52:32,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:52:32,444 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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] [2023-11-29 04:52:32,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:52:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:32,645 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:52:32,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:52:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash -33642936, now seen corresponding path program 1 times [2023-11-29 04:52:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:52:32,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137902195] [2023-11-29 04:52:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:52:32,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:52:32,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134894170] [2023-11-29 04:52:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:32,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:32,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:52:32,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:52:32,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:52:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:33,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:52:33,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:52:33,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 04:52:33,201 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 21 treesize of output 9 [2023-11-29 04:52:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 805 proven. 0 refuted. 0 times theorem prover too weak. 1913 trivial. 0 not checked. [2023-11-29 04:52:33,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:52:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:52:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137902195] [2023-11-29 04:52:33,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:52:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134894170] [2023-11-29 04:52:33,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134894170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:52:33,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:52:33,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 04:52:33,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24211540] [2023-11-29 04:52:33,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:52:33,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:52:33,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:52:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:52:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:52:33,216 INFO L87 Difference]: Start difference. First operand 213 states and 228 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 04:52:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:52:33,542 INFO L93 Difference]: Finished difference Result 212 states and 227 transitions. [2023-11-29 04:52:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:52:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2023-11-29 04:52:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:52:33,544 INFO L225 Difference]: With dead ends: 212 [2023-11-29 04:52:33,544 INFO L226 Difference]: Without dead ends: 212 [2023-11-29 04:52:33,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:52:33,545 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 13 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:52:33,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 851 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:52:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-29 04:52:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-11-29 04:52:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 127 states have (on average 1.6929133858267718) internal successors, (215), 202 states have internal predecessors, (215), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:52:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 227 transitions. [2023-11-29 04:52:33,552 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 227 transitions. Word has length 129 [2023-11-29 04:52:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:52:33,553 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 227 transitions. [2023-11-29 04:52:33,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 04:52:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 227 transitions. [2023-11-29 04:52:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 04:52:33,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:52:33,555 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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] [2023-11-29 04:52:33,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:52:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:33,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:52:33,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:52:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -33642935, now seen corresponding path program 1 times [2023-11-29 04:52:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:52:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414446413] [2023-11-29 04:52:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:52:33,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:52:33,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71598393] [2023-11-29 04:52:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:52:33,838 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:52:33,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:52:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:34,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 04:52:34,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:52:34,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:52:47,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 04:52:47,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 04:52:47,418 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 25 treesize of output 13 [2023-11-29 04:52:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 703 proven. 614 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2023-11-29 04:52:47,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:52:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 845 proven. 28 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2023-11-29 04:52:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:52:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414446413] [2023-11-29 04:52:51,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:52:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71598393] [2023-11-29 04:52:51,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71598393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:52:51,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:52:51,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 39 [2023-11-29 04:52:51,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838894044] [2023-11-29 04:52:51,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:52:51,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 04:52:51,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:52:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 04:52:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1379, Unknown=3, NotChecked=0, Total=1560 [2023-11-29 04:52:51,822 INFO L87 Difference]: Start difference. First operand 212 states and 227 transitions. Second operand has 40 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 38 states have internal predecessors, (63), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 04:53:05,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:53:13,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:53:22,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:53:30,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:53:56,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:54:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:54:01,262 INFO L93 Difference]: Finished difference Result 215 states and 231 transitions. [2023-11-29 04:54:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:54:01,262 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 38 states have internal predecessors, (63), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 129 [2023-11-29 04:54:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:54:01,263 INFO L225 Difference]: With dead ends: 215 [2023-11-29 04:54:01,264 INFO L226 Difference]: Without dead ends: 215 [2023-11-29 04:54:01,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=296, Invalid=2143, Unknown=11, NotChecked=0, Total=2450 [2023-11-29 04:54:01,265 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 8 mSDsluCounter, 3077 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:54:01,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3232 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1731 Invalid, 5 Unknown, 0 Unchecked, 22.8s Time] [2023-11-29 04:54:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-29 04:54:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2023-11-29 04:54:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 127 states have (on average 1.68503937007874) internal successors, (214), 201 states have internal predecessors, (214), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:54:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2023-11-29 04:54:01,270 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 129 [2023-11-29 04:54:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:54:01,270 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2023-11-29 04:54:01,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 38 states have internal predecessors, (63), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-29 04:54:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2023-11-29 04:54:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 04:54:01,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:54:01,271 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1] [2023-11-29 04:54:01,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:54:01,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:54:01,472 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:54:01,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:54:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2029155724, now seen corresponding path program 1 times [2023-11-29 04:54:01,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:54:01,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900215735] [2023-11-29 04:54:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:54:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:54:01,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:54:01,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249909636] [2023-11-29 04:54:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:54:01,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:54:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:54:01,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:54:01,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:54:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:54:02,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 04:54:02,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:54:02,227 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 04:54:02,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 04:54:02,277 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:54:02,365 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-29 04:54:02,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-29 04:54:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1553 proven. 0 refuted. 0 times theorem prover too weak. 817 trivial. 348 not checked. [2023-11-29 04:54:02,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:54:02,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:54:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900215735] [2023-11-29 04:54:02,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:54:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249909636] [2023-11-29 04:54:02,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249909636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:54:02,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:54:02,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-29 04:54:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361891205] [2023-11-29 04:54:02,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:54:02,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:54:02,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:54:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:54:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=232, Unknown=1, NotChecked=30, Total=306 [2023-11-29 04:54:02,458 INFO L87 Difference]: Start difference. First operand 211 states and 226 transitions. Second operand has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:54:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:54:02,986 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2023-11-29 04:54:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:54:02,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 131 [2023-11-29 04:54:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:54:02,988 INFO L225 Difference]: With dead ends: 207 [2023-11-29 04:54:02,988 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 04:54:02,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=389, Unknown=1, NotChecked=40, Total=506 [2023-11-29 04:54:02,989 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 40 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:54:02,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1013 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 873 Invalid, 0 Unknown, 170 Unchecked, 0.4s Time] [2023-11-29 04:54:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 04:54:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-29 04:54:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 127 states have (on average 1.6535433070866141) internal successors, (210), 197 states have internal predecessors, (210), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:54:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 222 transitions. [2023-11-29 04:54:02,994 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 222 transitions. Word has length 131 [2023-11-29 04:54:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:54:02,994 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 222 transitions. [2023-11-29 04:54:02,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:54:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 222 transitions. [2023-11-29 04:54:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 04:54:02,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:54:02,995 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1] [2023-11-29 04:54:03,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:54:03,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:54:03,196 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:54:03,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:54:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2029155725, now seen corresponding path program 1 times [2023-11-29 04:54:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:54:03,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898449267] [2023-11-29 04:54:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:54:03,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:54:03,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:54:03,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938097777] [2023-11-29 04:54:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:54:03,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:54:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:54:03,264 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:54:03,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:54:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:54:03,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-29 04:54:03,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:54:03,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:54:25,455 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:54:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:54:25,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:54:25,633 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 04:54:25,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 04:54:26,749 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:54:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:54:27,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:54:27,502 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 04:54:27,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 04:54:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1074 proven. 468 refuted. 0 times theorem prover too weak. 480 trivial. 696 not checked. [2023-11-29 04:54:28,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:54:28,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:54:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898449267] [2023-11-29 04:54:28,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:54:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938097777] [2023-11-29 04:54:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938097777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:54:28,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:54:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-11-29 04:54:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205770732] [2023-11-29 04:54:28,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:54:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 04:54:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:54:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 04:54:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1098, Unknown=6, NotChecked=134, Total=1332 [2023-11-29 04:54:28,796 INFO L87 Difference]: Start difference. First operand 207 states and 222 transitions. Second operand has 35 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:54:32,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:54:36,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:54:45,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:54:53,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:54:57,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:01,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:05,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:14,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:23,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:32,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:59,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:55:59,327 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0)))) is different from true [2023-11-29 04:56:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:56:05,688 INFO L93 Difference]: Finished difference Result 208 states and 224 transitions. [2023-11-29 04:56:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:56:05,689 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 131 [2023-11-29 04:56:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:56:05,690 INFO L225 Difference]: With dead ends: 208 [2023-11-29 04:56:05,690 INFO L226 Difference]: Without dead ends: 208 [2023-11-29 04:56:05,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=213, Invalid=2232, Unknown=17, NotChecked=294, Total=2756 [2023-11-29 04:56:05,691 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 59 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 12 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 47.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:56:05,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 2205 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2116 Invalid, 11 Unknown, 421 Unchecked, 47.4s Time] [2023-11-29 04:56:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-29 04:56:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2023-11-29 04:56:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 127 states have (on average 1.6299212598425197) internal successors, (207), 194 states have internal predecessors, (207), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:56:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2023-11-29 04:56:05,696 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 131 [2023-11-29 04:56:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:56:05,696 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2023-11-29 04:56:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:56:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2023-11-29 04:56:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 04:56:05,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:56:05,698 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2023-11-29 04:56:05,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:56:05,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:56:05,898 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:56:05,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:56:05,899 INFO L85 PathProgramCache]: Analyzing trace with hash 687700156, now seen corresponding path program 1 times [2023-11-29 04:56:05,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:56:05,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939383529] [2023-11-29 04:56:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:56:05,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:56:05,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:56:05,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787452346] [2023-11-29 04:56:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:56:05,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:56:05,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:56:05,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:56:05,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:56:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:56:12,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 04:56:12,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:56:12,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:56:25,197 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:56:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:56:25,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:56:25,499 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 04:56:25,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 04:56:26,627 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:56:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:56:26,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:56:26,739 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 04:56:26,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 04:56:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1049 proven. 431 refuted. 0 times theorem prover too weak. 431 trivial. 807 not checked. [2023-11-29 04:56:27,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:56:28,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:56:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939383529] [2023-11-29 04:56:28,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:56:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787452346] [2023-11-29 04:56:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787452346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:56:28,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:56:28,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2023-11-29 04:56:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479498642] [2023-11-29 04:56:28,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:56:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 04:56:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:56:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 04:56:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1302, Unknown=4, NotChecked=146, Total=1560 [2023-11-29 04:56:28,415 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:56:32,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:56:36,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:56:40,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:56:49,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:56:53,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:56:57,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:01,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:09,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:14,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:18,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:18,510 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0)))) is different from true [2023-11-29 04:57:22,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:30,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:34,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:38,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:43,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:47,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:52,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:57:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:57,473 INFO L93 Difference]: Finished difference Result 213 states and 234 transitions. [2023-11-29 04:57:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:57:57,473 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 135 [2023-11-29 04:57:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:57,475 INFO L225 Difference]: With dead ends: 213 [2023-11-29 04:57:57,475 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 04:57:57,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=243, Invalid=2731, Unknown=8, NotChecked=324, Total=3306 [2023-11-29 04:57:57,476 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 76 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 8 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 2992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 72.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:57,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 2583 Invalid, 2992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2540 Invalid, 17 Unknown, 427 Unchecked, 72.2s Time] [2023-11-29 04:57:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 04:57:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 203. [2023-11-29 04:57:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 127 states have (on average 1.6220472440944882) internal successors, (206), 193 states have internal predecessors, (206), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:57:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 218 transitions. [2023-11-29 04:57:57,481 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 218 transitions. Word has length 135 [2023-11-29 04:57:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:57,482 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 218 transitions. [2023-11-29 04:57:57,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:57:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 218 transitions. [2023-11-29 04:57:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 04:57:57,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:57,483 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:57,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 04:57:57,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:57,684 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:57:57,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash -156131612, now seen corresponding path program 1 times [2023-11-29 04:57:57,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:57,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722343284] [2023-11-29 04:57:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:57,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:57,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:57:57,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285883724] [2023-11-29 04:57:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:57,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:57,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:57,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:57,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:57:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:58,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 04:57:58,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:58,440 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:57:58,510 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 04:57:58,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 04:57:58,530 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-29 04:57:58,562 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 04:57:58,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 04:57:58,617 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 04:57:58,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 04:57:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1141 proven. 2 refuted. 0 times theorem prover too weak. 707 trivial. 868 not checked. [2023-11-29 04:57:58,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:57:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722343284] [2023-11-29 04:57:59,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:57:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285883724] [2023-11-29 04:57:59,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285883724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:59,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:57:59,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 04:57:59,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162148108] [2023-11-29 04:57:59,029 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:57:59,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:57:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:57:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=153, Unknown=2, NotChecked=50, Total=240 [2023-11-29 04:57:59,031 INFO L87 Difference]: Start difference. First operand 203 states and 218 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:57:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:59,452 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2023-11-29 04:57:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:57:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 136 [2023-11-29 04:57:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:59,454 INFO L225 Difference]: With dead ends: 199 [2023-11-29 04:57:59,454 INFO L226 Difference]: Without dead ends: 199 [2023-11-29 04:57:59,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=253, Unknown=2, NotChecked=66, Total=380 [2023-11-29 04:57:59,455 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 43 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:59,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 860 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 745 Invalid, 0 Unknown, 325 Unchecked, 0.3s Time] [2023-11-29 04:57:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-29 04:57:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-11-29 04:57:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 127 states have (on average 1.5905511811023623) internal successors, (202), 189 states have internal predecessors, (202), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 04:57:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 214 transitions. [2023-11-29 04:57:59,461 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 214 transitions. Word has length 136 [2023-11-29 04:57:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:59,462 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 214 transitions. [2023-11-29 04:57:59,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 04:57:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 214 transitions. [2023-11-29 04:57:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 04:57:59,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:59,463 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:59,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:57:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:57:59,664 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 04:57:59,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash -156131611, now seen corresponding path program 1 times [2023-11-29 04:57:59,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:59,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414746221] [2023-11-29 04:57:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:59,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:59,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:57:59,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465636341] [2023-11-29 04:57:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:59,742 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:59,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:58:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:09,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-29 04:58:09,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:09,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:58:19,928 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 04:58:19,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 04:58:19,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:58:21,629 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:58:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:58:21,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:58:21,847 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 04:58:21,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 04:58:23,232 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 04:58:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:58:23,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 04:58:23,359 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 04:58:23,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 04:58:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 668 proven. 606 refuted. 0 times theorem prover too weak. 290 trivial. 1154 not checked. [2023-11-29 04:58:25,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:58:25,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:25,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414746221] [2023-11-29 04:58:25,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:58:25,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465636341] [2023-11-29 04:58:25,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465636341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:58:25,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:58:25,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2023-11-29 04:58:25,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237670204] [2023-11-29 04:58:25,691 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 04:58:25,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 04:58:25,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 04:58:25,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1689, Unknown=3, NotChecked=166, Total=1980 [2023-11-29 04:58:25,693 INFO L87 Difference]: Start difference. First operand 199 states and 214 transitions. Second operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:58:29,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:58:33,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:58:37,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:58:41,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:58:50,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:58:54,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:58:58,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:02,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:10,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:15,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:19,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:23,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:27,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:31,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:40,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:44,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:52,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:59:56,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:00:00,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:00:06,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:00:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:14,908 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2023-11-29 05:00:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:00:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 136 [2023-11-29 05:00:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:14,910 INFO L225 Difference]: With dead ends: 203 [2023-11-29 05:00:14,910 INFO L226 Difference]: Without dead ends: 203 [2023-11-29 05:00:14,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=311, Invalid=3850, Unknown=7, NotChecked=254, Total=4422 [2023-11-29 05:00:14,911 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 92 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 14 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 3207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 84.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:14,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 2554 Invalid, 3207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2854 Invalid, 20 Unknown, 319 Unchecked, 84.7s Time] [2023-11-29 05:00:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-29 05:00:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2023-11-29 05:00:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 127 states have (on average 1.5590551181102361) internal successors, (198), 185 states have internal predecessors, (198), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 05:00:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 210 transitions. [2023-11-29 05:00:14,916 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 210 transitions. Word has length 136 [2023-11-29 05:00:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:14,917 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 210 transitions. [2023-11-29 05:00:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:00:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 210 transitions. [2023-11-29 05:00:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 05:00:14,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:14,918 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:14,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:00:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:00:15,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 05:00:15,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -971735828, now seen corresponding path program 1 times [2023-11-29 05:00:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:15,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092657893] [2023-11-29 05:00:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:15,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:00:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326963741] [2023-11-29 05:00:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:15,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:15,190 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:00:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:15,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 05:00:15,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:15,968 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 05:00:16,038 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 05:00:16,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 05:00:16,130 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 05:00:16,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 05:00:16,197 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:00:16,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-29 05:00:16,239 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-29 05:00:16,270 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-29 05:00:16,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-29 05:00:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 553 proven. 176 refuted. 0 times theorem prover too weak. 599 trivial. 1390 not checked. [2023-11-29 05:00:16,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:00:17,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:00:17,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092657893] [2023-11-29 05:00:17,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:00:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326963741] [2023-11-29 05:00:17,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326963741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:00:17,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:00:17,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 05:00:17,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408287518] [2023-11-29 05:00:17,004 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:00:17,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:00:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:00:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:00:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=527, Unknown=2, NotChecked=94, Total=702 [2023-11-29 05:00:17,006 INFO L87 Difference]: Start difference. First operand 195 states and 210 transitions. Second operand has 19 states, 17 states have (on average 3.588235294117647) internal successors, (61), 15 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:00:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:00:17,549 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2023-11-29 05:00:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:00:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.588235294117647) internal successors, (61), 15 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 141 [2023-11-29 05:00:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:00:17,551 INFO L225 Difference]: With dead ends: 191 [2023-11-29 05:00:17,551 INFO L226 Difference]: Without dead ends: 191 [2023-11-29 05:00:17,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 170 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=695, Unknown=2, NotChecked=110, Total=930 [2023-11-29 05:00:17,552 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 61 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:00:17,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1013 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 926 Invalid, 0 Unknown, 309 Unchecked, 0.4s Time] [2023-11-29 05:00:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-29 05:00:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-29 05:00:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 127 states have (on average 1.5275590551181102) internal successors, (194), 181 states have internal predecessors, (194), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 05:00:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2023-11-29 05:00:17,557 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 141 [2023-11-29 05:00:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:00:17,557 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2023-11-29 05:00:17,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.588235294117647) internal successors, (61), 15 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:00:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2023-11-29 05:00:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 05:00:17,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:00:17,558 INFO L195 NwaCegarLoop]: trace histogram [67, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:00:17,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:00:17,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:17,758 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-29 05:00:17,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:00:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash -971735827, now seen corresponding path program 1 times [2023-11-29 05:00:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:00:17,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992182720] [2023-11-29 05:00:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:00:17,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:00:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417426878] [2023-11-29 05:00:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:00:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:00:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:00:17,833 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:00:17,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c735b4c9-ffb4-45bf-be27-ac17c8dfa523/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:00:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:00:18,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 135 conjunts are in the unsatisfiable core [2023-11-29 05:00:18,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:00:18,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:00:27,470 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 05:00:27,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:00:27,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 05:00:27,692 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 05:00:27,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 05:00:27,935 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2023-11-29 05:00:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:00:28,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 05:00:28,202 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:00:28,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:00:29,721 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:00:29,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-29 05:00:30,654 WARN L876 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse1 (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) (.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (<= (mod .cse0 4294967296) .cse1) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| .cse1) |c_#length|) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true [2023-11-29 05:01:48,064 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:01:48,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2023-11-29 05:02:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 41 proven. 990 refuted. 0 times theorem prover too weak. 257 trivial. 1430 not checked. [2023-11-29 05:02:38,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:42,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:42,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992182720] [2023-11-29 05:02:42,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:42,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417426878] [2023-11-29 05:02:42,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417426878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:42,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:02:42,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-11-29 05:02:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360648361] [2023-11-29 05:02:42,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:42,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 05:02:42,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:42,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 05:02:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2274, Unknown=34, NotChecked=294, Total=2756 [2023-11-29 05:02:42,938 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 49 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 44 states have internal predecessors, (90), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 05:02:47,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:02:51,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:03,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:07,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:11,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:15,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:28,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:32,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:44,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:48,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:03:57,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:01,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:13,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:17,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:31,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:35,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:48,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:04:52,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:05:06,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:05:10,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]