./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0235-3.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_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0235-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI --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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:59:03,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:59:03,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:59:04,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:59:04,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:59:04,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:59:04,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:59:04,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:59:04,052 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:59:04,053 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:59:04,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:59:04,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:59:04,055 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:59:04,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:59:04,057 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:59:04,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:59:04,058 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:59:04,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:59:04,059 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:59:04,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:59:04,061 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:59:04,061 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:59:04,062 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:59:04,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:59:04,063 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:59:04,063 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:59:04,064 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:59:04,064 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:59:04,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:59:04,066 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:59:04,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:59:04,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:59:04,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:04,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:59:04,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:59:04,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:59:04,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:59:04,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:59:04,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:59:04,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:59:04,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:59:04,071 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_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2023-11-24 21:59:04,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:59:04,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:59:04,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:59:04,439 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:59:04,440 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:59:04,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety/test-0235-3.i [2023-11-24 21:59:07,670 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:08,080 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:08,081 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/sv-benchmarks/c/memsafety/test-0235-3.i [2023-11-24 21:59:08,100 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/data/4d8c06ac8/9f71388f1d8f4fc382e787d6db5a1d10/FLAGcd223625b [2023-11-24 21:59:08,117 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/data/4d8c06ac8/9f71388f1d8f4fc382e787d6db5a1d10 [2023-11-24 21:59:08,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:08,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:08,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:08,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:08,130 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:08,131 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:08,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393f9d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08, skipping insertion in model container [2023-11-24 21:59:08,132 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:08,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:08,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:08,743 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:08,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:08,854 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:08,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08 WrapperNode [2023-11-24 21:59:08,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:08,856 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:08,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:08,857 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:08,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:08,894 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:08,954 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 249 [2023-11-24 21:59:08,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:08,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:59:08,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:59:08,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:59:08,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:08,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:08,987 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,035 INFO L175 MemorySlicer]: Split 39 memory accesses to 3 slices as follows [2, 11, 26]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 13 writes are split as follows [0, 1, 12]. [2023-11-24 21:59:09,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,036 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,064 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:59:09,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:59:09,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:59:09,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:59:09,072 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (1/1) ... [2023-11-24 21:59:09,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:09,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:59:09,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:59:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:59:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:59:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:59:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:59:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:59:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:59:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:59:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:59:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-24 21:59:09,191 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-24 21:59:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:59:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:59:09,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:59:09,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:59:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2023-11-24 21:59:09,196 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2023-11-24 21:59:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:59:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:59:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:59:09,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:59:09,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:59:09,446 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:59:09,454 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:59:10,283 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:59:10,421 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:59:10,422 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-24 21:59:10,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:10 BoogieIcfgContainer [2023-11-24 21:59:10,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:59:10,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:59:10,426 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:59:10,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:59:10,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:08" (1/3) ... [2023-11-24 21:59:10,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435c93a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:10, skipping insertion in model container [2023-11-24 21:59:10,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:08" (2/3) ... [2023-11-24 21:59:10,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435c93a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:10, skipping insertion in model container [2023-11-24 21:59:10,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:10" (3/3) ... [2023-11-24 21:59:10,438 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2023-11-24 21:59:10,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:59:10,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2023-11-24 21:59:10,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:10,531 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;@6b65aead, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:10,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2023-11-24 21:59:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 197 states have internal predecessors, (229), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:59:10,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:10,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:59:10,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:10,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash 487602, now seen corresponding path program 1 times [2023-11-24 21:59:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846279812] [2023-11-24 21:59:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:10,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846279812] [2023-11-24 21:59:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846279812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:10,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:10,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357357638] [2023-11-24 21:59:10,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:10,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:59:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:59:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:59:10,848 INFO L87 Difference]: Start difference. First operand has 213 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 197 states have internal predecessors, (229), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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) [2023-11-24 21:59:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:11,023 INFO L93 Difference]: Finished difference Result 213 states and 244 transitions. [2023-11-24 21:59:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:59:11,026 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 [2023-11-24 21:59:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:11,044 INFO L225 Difference]: With dead ends: 213 [2023-11-24 21:59:11,044 INFO L226 Difference]: Without dead ends: 212 [2023-11-24 21:59:11,046 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 [2023-11-24 21:59:11,052 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:11,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 220 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-24 21:59:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-11-24 21:59:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 108 states have (on average 2.009259259259259) internal successors, (217), 196 states have internal predecessors, (217), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2023-11-24 21:59:11,129 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 3 [2023-11-24 21:59:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:11,129 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2023-11-24 21:59:11,129 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) [2023-11-24 21:59:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2023-11-24 21:59:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:59:11,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:11,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:59:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:59:11,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:11,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 464461737, now seen corresponding path program 1 times [2023-11-24 21:59:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:11,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023740483] [2023-11-24 21:59:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:11,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300681344] [2023-11-24 21:59:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:11,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:11,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:11,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:59:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:11,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:59:11,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:11,372 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 [2023-11-24 21:59:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:11,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023740483] [2023-11-24 21:59:11,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300681344] [2023-11-24 21:59:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300681344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:11,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:11,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921430385] [2023-11-24 21:59:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:11,390 INFO L87 Difference]: Start difference. First operand 212 states and 243 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) [2023-11-24 21:59:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:11,645 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2023-11-24 21:59:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:11,646 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 [2023-11-24 21:59:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:11,650 INFO L225 Difference]: With dead ends: 211 [2023-11-24 21:59:11,651 INFO L226 Difference]: Without dead ends: 211 [2023-11-24 21:59:11,651 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 [2023-11-24 21:59:11,655 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:11,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 369 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:59:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-24 21:59:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-24 21:59:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 108 states have (on average 2.0) internal successors, (216), 195 states have internal predecessors, (216), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 242 transitions. [2023-11-24 21:59:11,706 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 242 transitions. Word has length 5 [2023-11-24 21:59:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:11,706 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 242 transitions. [2023-11-24 21:59:11,706 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) [2023-11-24 21:59:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 242 transitions. [2023-11-24 21:59:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:59:11,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:11,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:59:11,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:11,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 21:59:11,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:11,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1513412199, now seen corresponding path program 1 times [2023-11-24 21:59:11,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:11,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459268464] [2023-11-24 21:59:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:11,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608965131] [2023-11-24 21:59:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:11,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:11,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:59:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:12,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:59:12,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:12,254 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 [2023-11-24 21:59:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:12,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:12,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:12,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459268464] [2023-11-24 21:59:12,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:12,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608965131] [2023-11-24 21:59:12,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608965131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:12,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:12,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:12,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389913762] [2023-11-24 21:59:12,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:12,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:12,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:12,325 INFO L87 Difference]: Start difference. First operand 211 states and 242 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) [2023-11-24 21:59:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:12,637 INFO L93 Difference]: Finished difference Result 218 states and 249 transitions. [2023-11-24 21:59:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:12,638 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 [2023-11-24 21:59:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:12,640 INFO L225 Difference]: With dead ends: 218 [2023-11-24 21:59:12,641 INFO L226 Difference]: Without dead ends: 218 [2023-11-24 21:59:12,641 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 [2023-11-24 21:59:12,645 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 9 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:12,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 579 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:59:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-24 21:59:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2023-11-24 21:59:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 114 states have (on average 1.956140350877193) internal successors, (223), 201 states have internal predecessors, (223), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 249 transitions. [2023-11-24 21:59:12,690 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 249 transitions. Word has length 6 [2023-11-24 21:59:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:12,690 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 249 transitions. [2023-11-24 21:59:12,690 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) [2023-11-24 21:59:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 249 transitions. [2023-11-24 21:59:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 21:59:12,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:12,694 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] [2023-11-24 21:59:12,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:12,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:12,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:12,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash 740659307, now seen corresponding path program 1 times [2023-11-24 21:59:12,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:12,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431523814] [2023-11-24 21:59:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:12,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:12,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:12,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473252118] [2023-11-24 21:59:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:12,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:12,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:13,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:59:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:13,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:59:13,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:13,356 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 [2023-11-24 21:59:13,453 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 [2023-11-24 21:59:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-24 21:59:13,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431523814] [2023-11-24 21:59:13,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:13,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473252118] [2023-11-24 21:59:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473252118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:13,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:59:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250539533] [2023-11-24 21:59:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:13,663 INFO L87 Difference]: Start difference. First operand 218 states and 249 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 21:59:16,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 21:59:21,091 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] [2023-11-24 21:59:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:22,783 INFO L93 Difference]: Finished difference Result 226 states and 257 transitions. [2023-11-24 21:59:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2023-11-24 21:59:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:22,791 INFO L225 Difference]: With dead ends: 226 [2023-11-24 21:59:22,792 INFO L226 Difference]: Without dead ends: 220 [2023-11-24 21:59:22,792 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 [2023-11-24 21:59:22,793 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:22,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 792 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2023-11-24 21:59:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-24 21:59:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-11-24 21:59:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 116 states have (on average 1.9396551724137931) internal successors, (225), 203 states have internal predecessors, (225), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2023-11-24 21:59:22,808 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 55 [2023-11-24 21:59:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:22,809 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2023-11-24 21:59:22,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-24 21:59:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2023-11-24 21:59:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-24 21:59:22,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:22,812 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] [2023-11-24 21:59:22,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:59:23,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:23,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:23,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash -780331179, now seen corresponding path program 1 times [2023-11-24 21:59:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:23,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019610301] [2023-11-24 21:59:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:23,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:23,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:23,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165901609] [2023-11-24 21:59:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:23,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:23,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:23,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:59:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:23,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:59:23,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:23,503 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 [2023-11-24 21:59:23,539 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 [2023-11-24 21:59:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-24 21:59:23,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-24 21:59:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:23,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019610301] [2023-11-24 21:59:23,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:23,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165901609] [2023-11-24 21:59:23,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165901609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:23,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:59:23,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-24 21:59:23,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544011993] [2023-11-24 21:59:23,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:23,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:59:23,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:59:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:59:23,945 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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) [2023-11-24 21:59:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:24,503 INFO L93 Difference]: Finished difference Result 238 states and 271 transitions. [2023-11-24 21:59:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:59:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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 60 [2023-11-24 21:59:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:24,506 INFO L225 Difference]: With dead ends: 238 [2023-11-24 21:59:24,506 INFO L226 Difference]: Without dead ends: 226 [2023-11-24 21:59:24,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:59:24,507 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 7 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:24,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1167 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:59:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-24 21:59:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-11-24 21:59:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 122 states have (on average 1.8934426229508197) internal successors, (231), 209 states have internal predecessors, (231), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 257 transitions. [2023-11-24 21:59:24,518 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 257 transitions. Word has length 60 [2023-11-24 21:59:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:24,518 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 257 transitions. [2023-11-24 21:59:24,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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) [2023-11-24 21:59:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 257 transitions. [2023-11-24 21:59:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-24 21:59:24,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:24,521 INFO L195 NwaCegarLoop]: trace histogram [20, 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] [2023-11-24 21:59:24,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:24,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:24,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 803456235, now seen corresponding path program 2 times [2023-11-24 21:59:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:24,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327335596] [2023-11-24 21:59:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:24,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302051703] [2023-11-24 21:59:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:59:24,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:24,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:24,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:59:25,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:59:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:25,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-24 21:59:25,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:25,587 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 [2023-11-24 21:59:25,618 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 [2023-11-24 21:59:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 239 proven. 56 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-24 21:59:25,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 75 proven. 70 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-24 21:59:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327335596] [2023-11-24 21:59:26,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302051703] [2023-11-24 21:59:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302051703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:26,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:59:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-11-24 21:59:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239504162] [2023-11-24 21:59:26,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:59:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:26,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:59:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:59:26,221 INFO L87 Difference]: Start difference. First operand 226 states and 257 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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) [2023-11-24 21:59:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:27,274 INFO L93 Difference]: Finished difference Result 246 states and 281 transitions. [2023-11-24 21:59:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:59:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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 75 [2023-11-24 21:59:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:27,277 INFO L225 Difference]: With dead ends: 246 [2023-11-24 21:59:27,277 INFO L226 Difference]: Without dead ends: 234 [2023-11-24 21:59:27,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-11-24 21:59:27,279 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 11 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:27,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2859 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:59:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-24 21:59:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2023-11-24 21:59:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 130 states have (on average 1.8384615384615384) internal successors, (239), 217 states have internal predecessors, (239), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 265 transitions. [2023-11-24 21:59:27,291 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 265 transitions. Word has length 75 [2023-11-24 21:59:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,291 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 265 transitions. [2023-11-24 21:59:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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) [2023-11-24 21:59:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 265 transitions. [2023-11-24 21:59:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-24 21:59:27,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,294 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2023-11-24 21:59:27,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:27,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:27,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:27,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1621706389, now seen corresponding path program 3 times [2023-11-24 21:59:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24231318] [2023-11-24 21:59:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:27,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592218254] [2023-11-24 21:59:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:59:27,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:27,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:27,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:27,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:59:27,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:59:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:27,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:59:27,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:27,953 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 [2023-11-24 21:59:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2023-11-24 21:59:27,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24231318] [2023-11-24 21:59:27,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592218254] [2023-11-24 21:59:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592218254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691025944] [2023-11-24 21:59:27,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:27,994 INFO L87 Difference]: Start difference. First operand 234 states and 265 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) [2023-11-24 21:59:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:28,255 INFO L93 Difference]: Finished difference Result 233 states and 264 transitions. [2023-11-24 21:59:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:28,256 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 95 [2023-11-24 21:59:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:28,259 INFO L225 Difference]: With dead ends: 233 [2023-11-24 21:59:28,259 INFO L226 Difference]: Without dead ends: 233 [2023-11-24 21:59:28,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:28,260 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 9 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 569 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 [2023-11-24 21:59:28,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 569 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:59:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-24 21:59:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2023-11-24 21:59:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 130 states have (on average 1.8307692307692307) internal successors, (238), 216 states have internal predecessors, (238), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 264 transitions. [2023-11-24 21:59:28,279 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 264 transitions. Word has length 95 [2023-11-24 21:59:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:28,281 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 264 transitions. [2023-11-24 21:59:28,281 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) [2023-11-24 21:59:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 264 transitions. [2023-11-24 21:59:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-24 21:59:28,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:28,293 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-11-24 21:59:28,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:28,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:28,506 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:28,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:28,506 INFO L85 PathProgramCache]: Analyzing trace with hash 263455380, now seen corresponding path program 1 times [2023-11-24 21:59:28,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:28,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524966693] [2023-11-24 21:59:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:28,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:28,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391345382] [2023-11-24 21:59:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:28,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:28,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:28,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:59:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:29,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:59:29,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:29,298 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 [2023-11-24 21:59:29,375 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:59:29,375 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 [2023-11-24 21:59:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 693 proven. 1 refuted. 0 times theorem prover too weak. 742 trivial. 85 not checked. [2023-11-24 21:59:29,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:29,797 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:59:29,798 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 [2023-11-24 21:59:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 693 proven. 86 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2023-11-24 21:59:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524966693] [2023-11-24 21:59:29,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 21:59:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391345382] [2023-11-24 21:59:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391345382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:29,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:59:29,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-11-24 21:59:29,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970023226] [2023-11-24 21:59:29,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:29,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:59:29,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:59:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-24 21:59:29,831 INFO L87 Difference]: Start difference. First operand 233 states and 264 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) [2023-11-24 21:59:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:30,812 INFO L93 Difference]: Finished difference Result 323 states and 375 transitions. [2023-11-24 21:59:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:59:30,813 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 108 [2023-11-24 21:59:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:30,817 INFO L225 Difference]: With dead ends: 323 [2023-11-24 21:59:30,817 INFO L226 Difference]: Without dead ends: 323 [2023-11-24 21:59:30,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-11-24 21:59:30,819 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 320 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:30,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1403 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 906 Invalid, 0 Unknown, 346 Unchecked, 0.8s Time] [2023-11-24 21:59:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-24 21:59:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 231. [2023-11-24 21:59:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 214 states have internal predecessors, (236), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-24 21:59:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2023-11-24 21:59:30,831 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 108 [2023-11-24 21:59:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:30,832 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2023-11-24 21:59:30,832 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) [2023-11-24 21:59:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2023-11-24 21:59:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-24 21:59:30,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:30,834 INFO L195 NwaCegarLoop]: trace histogram [48, 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] [2023-11-24 21:59:30,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:31,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:59:31,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2023-11-24 21:59:31,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:31,043 INFO L85 PathProgramCache]: Analyzing trace with hash 263455381, now seen corresponding path program 1 times [2023-11-24 21:59:31,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:31,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048890771] [2023-11-24 21:59:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:31,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:31,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 21:59:31,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343358328] [2023-11-24 21:59:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:31,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:31,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca60e6d-85ac-41fb-a8c7-5d7c9114926f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:59:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:36,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-24 21:59:36,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:36,874 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 [2023-11-24 22:00:04,506 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 [2023-11-24 22:00:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:04,695 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 [2023-11-24 22:00:04,833 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 22:00:04,833 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 [2023-11-24 22:00:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 574 proven. 316 refuted. 0 times theorem prover too weak. 482 trivial. 149 not checked. [2023-11-24 22:00:05,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048890771] [2023-11-24 22:00:06,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 22:00:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343358328] [2023-11-24 22:00:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343358328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:06,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:06,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-11-24 22:00:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996453786] [2023-11-24 22:00:06,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:06,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 22:00:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 22:00:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=681, Unknown=5, NotChecked=52, Total=812 [2023-11-24 22:00:06,052 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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)