./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.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_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/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_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/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_02ba9cff-1fa4-46f2-a368-728922832f00/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 b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:37:49,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:37:50,051 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:37:50,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:37:50,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:37:50,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:37:50,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:37:50,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:37:50,092 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:37:50,092 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:37:50,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:37:50,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:37:50,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:37:50,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:37:50,096 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:37:50,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:37:50,098 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:37:50,098 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:37:50,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:37:50,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:37:50,100 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:37:50,101 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:37:50,102 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:37:50,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:37:50,103 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:37:50,104 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:37:50,105 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:37:50,105 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:37:50,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:37:50,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:37:50,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:37:50,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:37:50,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:37:50,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:37:50,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:37:50,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:37:50,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:37:50,111 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:37:50,111 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:37:50,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:37:50,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:37:50,113 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_02ba9cff-1fa4-46f2-a368-728922832f00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 [2023-11-24 21:37:50,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:37:50,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:37:50,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:37:50,475 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:37:50,476 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:37:50,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2023-11-24 21:37:53,970 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:37:54,319 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:37:54,321 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2023-11-24 21:37:54,337 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data/710cd6390/cc90d84304014da0b2038dca529b6c5e/FLAGaac569f95 [2023-11-24 21:37:54,354 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data/710cd6390/cc90d84304014da0b2038dca529b6c5e [2023-11-24 21:37:54,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:37:54,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:37:54,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:37:54,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:37:54,392 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:37:54,393 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:37:54" (1/1) ... [2023-11-24 21:37:54,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c3ed0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:54, skipping insertion in model container [2023-11-24 21:37:54,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:37:54" (1/1) ... [2023-11-24 21:37:54,510 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:37:54,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:37:54,959 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:37:55,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:37:55,045 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:37:55,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55 WrapperNode [2023-11-24 21:37:55,046 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:37:55,047 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:37:55,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:37:55,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:37:55,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,105 INFO L138 Inliner]: procedures = 126, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2023-11-24 21:37:55,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:37:55,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:37:55,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:37:55,107 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:37:55,120 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,124 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,147 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 8, 10]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 2, 3]. [2023-11-24 21:37:55,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,163 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:37:55,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:37:55,179 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:37:55,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:37:55,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (1/1) ... [2023-11-24 21:37:55,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:37:55,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:37:55,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:37:55,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:37:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:37:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:37:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:37:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:37:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:37:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:37:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:37:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:37:55,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:37:55,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:37:55,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:37:55,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:37:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:37:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:37:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:37:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:37:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:37:55,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:37:55,489 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:37:55,492 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:37:55,963 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:37:56,045 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:37:56,045 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:37:56,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:56 BoogieIcfgContainer [2023-11-24 21:37:56,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:37:56,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:37:56,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:37:56,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:37:56,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:37:54" (1/3) ... [2023-11-24 21:37:56,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb2867c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:37:56, skipping insertion in model container [2023-11-24 21:37:56,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:37:55" (2/3) ... [2023-11-24 21:37:56,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb2867c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:37:56, skipping insertion in model container [2023-11-24 21:37:56,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:56" (3/3) ... [2023-11-24 21:37:56,057 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2023-11-24 21:37:56,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:37:56,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-24 21:37:56,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:37:56,138 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;@7cedde65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:37:56,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-11-24 21:37:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 79 states have internal predecessors, (86), 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 21:37:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:37:56,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:56,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:37:56,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:56,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash 161642, now seen corresponding path program 1 times [2023-11-24 21:37:56,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815939280] [2023-11-24 21:37:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:56,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:56,571 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 21:37:56,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815939280] [2023-11-24 21:37:56,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815939280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:56,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:56,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:56,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844888667] [2023-11-24 21:37:56,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:56,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:56,643 INFO L87 Difference]: Start difference. First operand has 80 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 79 states have internal predecessors, (86), 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) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:37:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:56,913 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-11-24 21:37:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:37:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:56,927 INFO L225 Difference]: With dead ends: 76 [2023-11-24 21:37:56,927 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:37:56,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:37:56,934 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:56,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 60 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:37:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-11-24 21:37:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 73 states have internal predecessors, (79), 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 21:37:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2023-11-24 21:37:56,983 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 3 [2023-11-24 21:37:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:56,984 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2023-11-24 21:37:56,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:37:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2023-11-24 21:37:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:37:56,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:56,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:37:56,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:37:56,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:56,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash 161643, now seen corresponding path program 1 times [2023-11-24 21:37:56,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:56,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475694313] [2023-11-24 21:37:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:56,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,335 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 21:37:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475694313] [2023-11-24 21:37:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475694313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:57,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637955617] [2023-11-24 21:37:57,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:57,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:57,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:57,345 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:37:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:57,588 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2023-11-24 21:37:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:37:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:57,594 INFO L225 Difference]: With dead ends: 94 [2023-11-24 21:37:57,594 INFO L226 Difference]: Without dead ends: 94 [2023-11-24 21:37:57,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:37:57,598 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 72 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:57,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 65 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-24 21:37:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2023-11-24 21:37:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 76 states have internal predecessors, (86), 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 21:37:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-24 21:37:57,620 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 3 [2023-11-24 21:37:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:57,620 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-24 21:37:57,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:37:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-24 21:37:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:37:57,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:57,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:37:57,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:37:57,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:57,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 5010882, now seen corresponding path program 1 times [2023-11-24 21:37:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178193762] [2023-11-24 21:37:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:57,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,704 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 21:37:57,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178193762] [2023-11-24 21:37:57,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178193762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:57,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771625021] [2023-11-24 21:37:57,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:57,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:57,714 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 21:37:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:57,803 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-11-24 21:37:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:57,804 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), 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 4 [2023-11-24 21:37:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:57,805 INFO L225 Difference]: With dead ends: 73 [2023-11-24 21:37:57,805 INFO L226 Difference]: Without dead ends: 73 [2023-11-24 21:37:57,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:37:57,807 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:57,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:37:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-24 21:37:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-24 21:37:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 72 states have internal predecessors, (82), 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 21:37:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2023-11-24 21:37:57,815 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 4 [2023-11-24 21:37:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:57,815 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2023-11-24 21:37:57,816 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), 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 21:37:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2023-11-24 21:37:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:37:57,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:57,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:37:57,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:37:57,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:57,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:57,818 INFO L85 PathProgramCache]: Analyzing trace with hash 5010883, now seen corresponding path program 1 times [2023-11-24 21:37:57,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:57,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755220291] [2023-11-24 21:37:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:57,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:57,877 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 21:37:57,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:57,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755220291] [2023-11-24 21:37:57,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755220291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:57,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:57,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:37:57,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015238595] [2023-11-24 21:37:57,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:57,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:57,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:57,880 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 21:37:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:57,943 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-11-24 21:37:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:57,944 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), 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 4 [2023-11-24 21:37:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:57,945 INFO L225 Difference]: With dead ends: 69 [2023-11-24 21:37:57,945 INFO L226 Difference]: Without dead ends: 69 [2023-11-24 21:37:57,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:37:57,947 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:57,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:37:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-24 21:37:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-24 21:37:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 68 states have internal predecessors, (78), 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 21:37:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2023-11-24 21:37:57,955 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 4 [2023-11-24 21:37:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:57,955 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2023-11-24 21:37:57,955 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), 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 21:37:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2023-11-24 21:37:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:37:57,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:57,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:57,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:37:57,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:57,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:57,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2086236227, now seen corresponding path program 1 times [2023-11-24 21:37:57,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:57,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272280284] [2023-11-24 21:37:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,277 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 21:37:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272280284] [2023-11-24 21:37:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272280284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:58,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:58,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:37:58,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993171562] [2023-11-24 21:37:58,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:37:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:37:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:37:58,282 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 21:37:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:58,506 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2023-11-24 21:37:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:37:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 8 [2023-11-24 21:37:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:58,511 INFO L225 Difference]: With dead ends: 77 [2023-11-24 21:37:58,512 INFO L226 Difference]: Without dead ends: 77 [2023-11-24 21:37:58,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:37:58,516 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 14 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:58,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 300 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:37:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-24 21:37:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2023-11-24 21:37:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 73 states have internal predecessors, (83), 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 21:37:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-11-24 21:37:58,540 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 8 [2023-11-24 21:37:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:58,540 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-11-24 21:37:58,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 21:37:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-11-24 21:37:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:37:58,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:58,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:58,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:37:58,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:58,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1991850737, now seen corresponding path program 1 times [2023-11-24 21:37:58,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:58,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045432390] [2023-11-24 21:37:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:58,832 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 21:37:58,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045432390] [2023-11-24 21:37:58,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045432390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:58,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:58,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:37:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147857709] [2023-11-24 21:37:58,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:58,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:37:58,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:37:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:37:58,842 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:37:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:59,032 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2023-11-24 21:37:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:37:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2023-11-24 21:37:59,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:59,041 INFO L225 Difference]: With dead ends: 92 [2023-11-24 21:37:59,041 INFO L226 Difference]: Without dead ends: 92 [2023-11-24 21:37:59,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:37:59,044 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:59,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 102 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-24 21:37:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2023-11-24 21:37:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 73 states have internal predecessors, (82), 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 21:37:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-11-24 21:37:59,065 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 13 [2023-11-24 21:37:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:59,066 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-11-24 21:37:59,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:37:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-11-24 21:37:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:37:59,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:59,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:37:59,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:59,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1991850738, now seen corresponding path program 1 times [2023-11-24 21:37:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256939944] [2023-11-24 21:37:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,400 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 21:37:59,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:59,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256939944] [2023-11-24 21:37:59,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256939944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:59,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:59,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:37:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087656150] [2023-11-24 21:37:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:59,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:37:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:37:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:37:59,403 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:37:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:59,631 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2023-11-24 21:37:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:37:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2023-11-24 21:37:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:59,633 INFO L225 Difference]: With dead ends: 87 [2023-11-24 21:37:59,633 INFO L226 Difference]: Without dead ends: 87 [2023-11-24 21:37:59,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:37:59,634 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:59,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 133 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:37:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-24 21:37:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2023-11-24 21:37:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.702127659574468) internal successors, (80), 72 states have internal predecessors, (80), 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 21:37:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-11-24 21:37:59,641 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 13 [2023-11-24 21:37:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:59,642 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-11-24 21:37:59,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:37:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-11-24 21:37:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:37:59,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:59,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:59,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:37:59,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:59,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1991836803, now seen corresponding path program 1 times [2023-11-24 21:37:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:59,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362188097] [2023-11-24 21:37:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:59,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,687 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 21:37:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362188097] [2023-11-24 21:37:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362188097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:59,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:59,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:37:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140810566] [2023-11-24 21:37:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:37:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:37:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:37:59,690 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 21:37:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:59,720 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-24 21:37:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:37:59,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-11-24 21:37:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:59,722 INFO L225 Difference]: With dead ends: 56 [2023-11-24 21:37:59,722 INFO L226 Difference]: Without dead ends: 56 [2023-11-24 21:37:59,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:37:59,724 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:59,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:37:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-24 21:37:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-24 21:37:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 55 states have internal predecessors, (62), 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 21:37:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-24 21:37:59,729 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 13 [2023-11-24 21:37:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:59,730 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-24 21:37:59,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 21:37:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-24 21:37:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:37:59,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:59,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:37:59,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:59,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1993072933, now seen corresponding path program 1 times [2023-11-24 21:37:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951626267] [2023-11-24 21:37:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:37:59,803 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 21:37:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:37:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951626267] [2023-11-24 21:37:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951626267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:37:59,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:37:59,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:37:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223606692] [2023-11-24 21:37:59,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:37:59,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:37:59,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:37:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:37:59,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:59,808 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:37:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:37:59,865 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-11-24 21:37:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:37:59,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-11-24 21:37:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:37:59,867 INFO L225 Difference]: With dead ends: 54 [2023-11-24 21:37:59,867 INFO L226 Difference]: Without dead ends: 54 [2023-11-24 21:37:59,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:37:59,870 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:37:59,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 84 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:37:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-24 21:37:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-11-24 21:37:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.542857142857143) internal successors, (54), 51 states have internal predecessors, (54), 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 21:37:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-11-24 21:37:59,878 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 13 [2023-11-24 21:37:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:37:59,879 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-11-24 21:37:59,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:37:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-11-24 21:37:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:37:59,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:37:59,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:37:59,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:37:59,881 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:37:59,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:37:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1386795632, now seen corresponding path program 1 times [2023-11-24 21:37:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:37:59,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914808531] [2023-11-24 21:37:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:37:59,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:37:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,046 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 21:38:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914808531] [2023-11-24 21:38:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914808531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:00,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:00,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581582539] [2023-11-24 21:38:00,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:00,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:00,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:00,050 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 21:38:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:00,136 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-11-24 21:38:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-24 21:38:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:00,138 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:38:00,138 INFO L226 Difference]: Without dead ends: 51 [2023-11-24 21:38:00,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:00,139 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:00,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-24 21:38:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-24 21:38:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 50 states have internal predecessors, (53), 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 21:38:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-11-24 21:38:00,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 15 [2023-11-24 21:38:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:00,151 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-11-24 21:38:00,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 21:38:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-11-24 21:38:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:38:00,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:00,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:00,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:38:00,153 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:00,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash -40991519, now seen corresponding path program 1 times [2023-11-24 21:38:00,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:00,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582026059] [2023-11-24 21:38:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,379 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 21:38:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:00,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582026059] [2023-11-24 21:38:00,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582026059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:00,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:00,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:00,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801927619] [2023-11-24 21:38:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:00,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:00,382 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 21:38:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:00,481 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-11-24 21:38:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:00,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-24 21:38:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:00,483 INFO L225 Difference]: With dead ends: 50 [2023-11-24 21:38:00,483 INFO L226 Difference]: Without dead ends: 50 [2023-11-24 21:38:00,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:00,485 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:00,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 72 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-24 21:38:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-24 21:38:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 49 states have internal predecessors, (52), 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 21:38:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-11-24 21:38:00,488 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 16 [2023-11-24 21:38:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:00,489 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-11-24 21:38:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 21:38:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-11-24 21:38:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:38:00,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:00,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:00,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:38:00,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:00,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 467993133, now seen corresponding path program 1 times [2023-11-24 21:38:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:00,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842497451] [2023-11-24 21:38:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:00,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842497451] [2023-11-24 21:38:00,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842497451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876012752] [2023-11-24 21:38:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:00,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:00,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:00,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:38:00,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:38:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:01,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:38:01,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:01,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:01,328 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 21:38:01,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-24 21:38:01,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:38:01,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:01,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:38:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:01,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:01,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-24 21:38:02,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:38:02,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 339 [2023-11-24 21:38:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:02,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876012752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:38:02,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:38:02,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-24 21:38:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56466907] [2023-11-24 21:38:02,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:38:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:38:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:38:02,922 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 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 21:38:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:03,294 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2023-11-24 21:38:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:38:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 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 16 [2023-11-24 21:38:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:03,296 INFO L225 Difference]: With dead ends: 52 [2023-11-24 21:38:03,296 INFO L226 Difference]: Without dead ends: 52 [2023-11-24 21:38:03,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:38:03,297 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:03,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 127 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-24 21:38:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2023-11-24 21:38:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.457142857142857) internal successors, (51), 48 states have internal predecessors, (51), 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 21:38:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-11-24 21:38:03,299 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 16 [2023-11-24 21:38:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:03,300 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-11-24 21:38:03,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 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 21:38:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-11-24 21:38:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:38:03,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:03,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:03,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:03,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:38:03,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:03,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:03,508 INFO L85 PathProgramCache]: Analyzing trace with hash 467993134, now seen corresponding path program 1 times [2023-11-24 21:38:03,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:03,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749387783] [2023-11-24 21:38:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749387783] [2023-11-24 21:38:04,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749387783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45631524] [2023-11-24 21:38:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:04,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:04,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:38:04,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:38:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:04,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 21:38:04,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:04,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:04,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:04,442 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-24 21:38:04,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2023-11-24 21:38:04,462 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:38:04,463 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 15 treesize of output 15 [2023-11-24 21:38:04,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:38:04,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:04,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:04,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:38:04,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-24 21:38:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:04,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:04,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2023-11-24 21:38:04,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-11-24 21:38:04,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-24 21:38:05,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:38:05,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 134 [2023-11-24 21:38:05,142 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 68 treesize of output 64 [2023-11-24 21:38:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:05,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45631524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:38:05,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:38:05,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-24 21:38:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606994254] [2023-11-24 21:38:05,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:05,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:38:05,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:38:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:38:05,340 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 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 21:38:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:06,035 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-11-24 21:38:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:38:06,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 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 16 [2023-11-24 21:38:06,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:06,037 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:38:06,037 INFO L226 Difference]: Without dead ends: 51 [2023-11-24 21:38:06,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:38:06,038 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:06,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 291 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:38:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-24 21:38:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2023-11-24 21:38:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 47 states have internal predecessors, (50), 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 21:38:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-11-24 21:38:06,041 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 16 [2023-11-24 21:38:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:06,041 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-11-24 21:38:06,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 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 21:38:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-11-24 21:38:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:38:06,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:06,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:06,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:06,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:38:06,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:06,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1270736974, now seen corresponding path program 1 times [2023-11-24 21:38:06,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679155919] [2023-11-24 21:38:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,319 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 21:38:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679155919] [2023-11-24 21:38:06,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679155919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:06,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:06,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511702532] [2023-11-24 21:38:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:06,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:06,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:06,324 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 21:38:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:06,415 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-11-24 21:38:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2023-11-24 21:38:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:06,417 INFO L225 Difference]: With dead ends: 47 [2023-11-24 21:38:06,417 INFO L226 Difference]: Without dead ends: 47 [2023-11-24 21:38:06,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:06,418 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:06,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-24 21:38:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-24 21:38:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.4) internal successors, (49), 46 states have internal predecessors, (49), 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 21:38:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-24 21:38:06,421 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 17 [2023-11-24 21:38:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:06,422 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-24 21:38:06,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 21:38:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-24 21:38:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:38:06,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:06,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:06,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:38:06,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:06,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash -738140412, now seen corresponding path program 1 times [2023-11-24 21:38:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714348229] [2023-11-24 21:38:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,697 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 21:38:06,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:06,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714348229] [2023-11-24 21:38:06,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714348229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:06,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:06,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:06,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597164547] [2023-11-24 21:38:06,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:06,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:06,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:06,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:06,700 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 21:38:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:06,843 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-11-24 21:38:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2023-11-24 21:38:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:06,844 INFO L225 Difference]: With dead ends: 46 [2023-11-24 21:38:06,845 INFO L226 Difference]: Without dead ends: 46 [2023-11-24 21:38:06,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:06,845 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:06,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:38:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-24 21:38:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-24 21:38:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 45 states have internal predecessors, (48), 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 21:38:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-24 21:38:06,848 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 18 [2023-11-24 21:38:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:06,848 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-24 21:38:06,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 21:38:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-24 21:38:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:38:06,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:06,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:06,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:38:06,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:06,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -738140411, now seen corresponding path program 1 times [2023-11-24 21:38:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27953105] [2023-11-24 21:38:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:06,918 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 21:38:06,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:06,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27953105] [2023-11-24 21:38:06,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27953105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:06,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:06,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287557255] [2023-11-24 21:38:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:06,921 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21:38:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:06,965 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-11-24 21:38:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2023-11-24 21:38:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:06,967 INFO L225 Difference]: With dead ends: 42 [2023-11-24 21:38:06,967 INFO L226 Difference]: Without dead ends: 42 [2023-11-24 21:38:06,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:06,969 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:06,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:38:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-24 21:38:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-24 21:38:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 41 states have internal predecessors, (44), 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 21:38:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-11-24 21:38:06,973 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 18 [2023-11-24 21:38:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:06,974 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-11-24 21:38:06,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21:38:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-11-24 21:38:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:38:06,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:06,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:06,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:38:06,976 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:06,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 293159117, now seen corresponding path program 1 times [2023-11-24 21:38:06,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:06,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488644863] [2023-11-24 21:38:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:06,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:07,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:38:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:07,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:38:07,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:38:07,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK (43 of 44 remaining) [2023-11-24 21:38:07,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 44 remaining) [2023-11-24 21:38:07,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 44 remaining) [2023-11-24 21:38:07,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 44 remaining) [2023-11-24 21:38:07,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 44 remaining) [2023-11-24 21:38:07,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 44 remaining) [2023-11-24 21:38:07,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 44 remaining) [2023-11-24 21:38:07,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 44 remaining) [2023-11-24 21:38:07,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 44 remaining) [2023-11-24 21:38:07,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 44 remaining) [2023-11-24 21:38:07,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 44 remaining) [2023-11-24 21:38:07,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 44 remaining) [2023-11-24 21:38:07,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 44 remaining) [2023-11-24 21:38:07,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 44 remaining) [2023-11-24 21:38:07,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 44 remaining) [2023-11-24 21:38:07,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 44 remaining) [2023-11-24 21:38:07,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 44 remaining) [2023-11-24 21:38:07,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 44 remaining) [2023-11-24 21:38:07,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 44 remaining) [2023-11-24 21:38:07,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (24 of 44 remaining) [2023-11-24 21:38:07,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (23 of 44 remaining) [2023-11-24 21:38:07,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (22 of 44 remaining) [2023-11-24 21:38:07,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 44 remaining) [2023-11-24 21:38:07,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 44 remaining) [2023-11-24 21:38:07,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 44 remaining) [2023-11-24 21:38:07,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 44 remaining) [2023-11-24 21:38:07,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 44 remaining) [2023-11-24 21:38:07,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 44 remaining) [2023-11-24 21:38:07,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE (15 of 44 remaining) [2023-11-24 21:38:07,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (14 of 44 remaining) [2023-11-24 21:38:07,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (13 of 44 remaining) [2023-11-24 21:38:07,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 44 remaining) [2023-11-24 21:38:07,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 44 remaining) [2023-11-24 21:38:07,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 44 remaining) [2023-11-24 21:38:07,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 44 remaining) [2023-11-24 21:38:07,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 44 remaining) [2023-11-24 21:38:07,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 44 remaining) [2023-11-24 21:38:07,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 44 remaining) [2023-11-24 21:38:07,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 44 remaining) [2023-11-24 21:38:07,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (4 of 44 remaining) [2023-11-24 21:38:07,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE (3 of 44 remaining) [2023-11-24 21:38:07,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE (2 of 44 remaining) [2023-11-24 21:38:07,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 44 remaining) [2023-11-24 21:38:07,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 44 remaining) [2023-11-24 21:38:07,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:38:07,107 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:07,111 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 21:38:07,128 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~malloc9 [2023-11-24 21:38:07,128 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem6 [2023-11-24 21:38:07,129 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ite10 [2023-11-24 21:38:07,130 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem17 [2023-11-24 21:38:07,130 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem17 [2023-11-24 21:38:07,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 09:38:07 BoogieIcfgContainer [2023-11-24 21:38:07,143 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 21:38:07,143 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 21:38:07,143 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 21:38:07,144 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 21:38:07,144 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:37:56" (3/4) ... [2023-11-24 21:38:07,146 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 21:38:07,147 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 21:38:07,152 INFO L158 Benchmark]: Toolchain (without parser) took 12785.21ms. Allocated memory was 172.0MB in the beginning and 255.9MB in the end (delta: 83.9MB). Free memory was 128.3MB in the beginning and 188.1MB in the end (delta: -59.8MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2023-11-24 21:38:07,153 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 109.1MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:38:07,153 INFO L158 Benchmark]: CACSL2BoogieTranslator took 680.76ms. Allocated memory is still 172.0MB. Free memory was 128.3MB in the beginning and 127.4MB in the end (delta: 879.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:07,154 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.16ms. Allocated memory is still 172.0MB. Free memory was 126.8MB in the beginning and 125.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:07,154 INFO L158 Benchmark]: Boogie Preprocessor took 72.24ms. Allocated memory is still 172.0MB. Free memory was 125.3MB in the beginning and 122.0MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:07,155 INFO L158 Benchmark]: RCFGBuilder took 867.20ms. Allocated memory is still 172.0MB. Free memory was 122.0MB in the beginning and 99.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:07,156 INFO L158 Benchmark]: TraceAbstraction took 11093.67ms. Allocated memory was 172.0MB in the beginning and 255.9MB in the end (delta: 83.9MB). Free memory was 98.0MB in the beginning and 188.1MB in the end (delta: -90.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:38:07,156 INFO L158 Benchmark]: Witness Printer took 4.42ms. Allocated memory is still 255.9MB. Free memory is still 188.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:38:07,159 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 109.1MB. Free memory is still 76.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 680.76ms. Allocated memory is still 172.0MB. Free memory was 128.3MB in the beginning and 127.4MB in the end (delta: 879.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.16ms. Allocated memory is still 172.0MB. Free memory was 126.8MB in the beginning and 125.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.24ms. Allocated memory is still 172.0MB. Free memory was 125.3MB in the beginning and 122.0MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 867.20ms. Allocated memory is still 172.0MB. Free memory was 122.0MB in the beginning and 99.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 11093.67ms. Allocated memory was 172.0MB in the beginning and 255.9MB in the end (delta: 83.9MB). Free memory was 98.0MB in the beginning and 188.1MB in the end (delta: -90.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.42ms. Allocated memory is still 255.9MB. Free memory is still 188.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~malloc9 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem6 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ite10 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem17 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem17 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; [L541] struct item *list = ((void *)0); [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [c=0, length=0, list={6:0}] [L544] CALL append(&list) [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [c=1] [L533] item->next = *plist [L534] EXPR item->next VAL [c=1] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [c=1, item={3:0}, plist={6:0}, plist={6:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L537] *plist = item [L544] RET append(&list) [L545] length++ [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [c=1] [L548] COND FALSE, EXPR !(length < 0) VAL [c=1] [L551] EXPR \read(*list) VAL [c=1] [L551] EXPR list->next [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [c=1] [L552] EXPR free(list) VAL [c=1, length=1, list={6:0}, next={0:0}] [L552] EXPR free(list) VAL [c=1, length=1, list={6:0}, next={0:0}] [L552] EXPR free(list) [L553] EXPR list = next [L554] EXPR length-- [L547-L555] { if(length < 0) { free(list->data); } struct item *next = list->next; free(list); list = next; length--; } VAL [c=1, length=0, list={6:0}] [L556] COND FALSE !(length > 0) VAL [c=1, length=0, list={6:0}] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\result=0, c=1, length=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 80 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 11.0s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 684 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 684 mSDsluCounter, 1686 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1147 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1773 IncrementalHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 539 mSDtfsCounter, 1773 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=0, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 61 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 234 ConstructedInterpolants, 6 QuantifiedInterpolants, 2306 SizeOfPredicates, 35 NumberOfNonLiveVariables, 428 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 6/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-24 21:38:07,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/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_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/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 b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:38:09,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:38:10,077 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:38:10,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:38:10,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:38:10,136 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:38:10,137 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:38:10,138 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:38:10,139 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:38:10,144 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:38:10,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:38:10,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:38:10,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:38:10,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:38:10,148 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:38:10,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:38:10,149 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:38:10,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:38:10,149 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:38:10,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:38:10,150 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:38:10,151 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:38:10,151 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:38:10,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:38:10,152 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:38:10,153 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:38:10,153 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:38:10,153 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:38:10,154 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:38:10,154 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:38:10,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:38:10,157 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:38:10,157 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:38:10,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:38:10,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:38:10,158 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:38:10,159 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:38:10,159 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:38:10,159 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:38:10,160 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:38:10,160 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:38:10,160 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:38:10,160 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:38:10,161 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:38:10,161 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_02ba9cff-1fa4-46f2-a368-728922832f00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36390e4ace21fb538f0c1df6f562bcf2825b5901fb45d9987e6242615034592 [2023-11-24 21:38:10,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:38:10,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:38:10,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:38:10,562 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:38:10,563 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:38:10,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2023-11-24 21:38:14,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:38:14,341 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:38:14,342 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2023-11-24 21:38:14,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data/dfa8adc0e/7339d256fdf04d92a4e99874fa075a2c/FLAG850485a12 [2023-11-24 21:38:14,372 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/data/dfa8adc0e/7339d256fdf04d92a4e99874fa075a2c [2023-11-24 21:38:14,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:38:14,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:38:14,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:38:14,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:38:14,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:38:14,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:14,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7170f920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14, skipping insertion in model container [2023-11-24 21:38:14,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:14,439 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:38:14,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:38:14,871 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:38:14,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:38:14,976 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:38:14,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14 WrapperNode [2023-11-24 21:38:14,977 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:38:14,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:38:14,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:38:14,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:38:14,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,022 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,060 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 100 [2023-11-24 21:38:15,061 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:38:15,062 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:38:15,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:38:15,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:38:15,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,135 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 8, 10]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 2, 3]. [2023-11-24 21:38:15,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,156 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,186 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:38:15,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:38:15,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:38:15,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:38:15,188 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (1/1) ... [2023-11-24 21:38:15,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:38:15,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:15,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:38:15,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:38:15,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:38:15,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:38:15,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:38:15,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:38:15,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:38:15,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:38:15,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:38:15,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:38:15,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:38:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:38:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:38:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:38:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:38:15,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:38:15,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:38:15,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:38:15,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:38:15,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:38:15,465 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:38:15,468 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:38:15,941 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:38:16,012 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:38:16,012 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:38:16,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:16 BoogieIcfgContainer [2023-11-24 21:38:16,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:38:16,016 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:38:16,016 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:38:16,020 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:38:16,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:38:14" (1/3) ... [2023-11-24 21:38:16,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd1da06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:38:16, skipping insertion in model container [2023-11-24 21:38:16,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:14" (2/3) ... [2023-11-24 21:38:16,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd1da06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:38:16, skipping insertion in model container [2023-11-24 21:38:16,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:16" (3/3) ... [2023-11-24 21:38:16,026 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2023-11-24 21:38:16,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:38:16,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-24 21:38:16,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:38:16,115 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;@555cb31d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:38:16,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-11-24 21:38:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 79 states have internal predecessors, (86), 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 21:38:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:38:16,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:16,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:38:16,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:16,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash 161642, now seen corresponding path program 1 times [2023-11-24 21:38:16,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:16,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620891204] [2023-11-24 21:38:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:16,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:16,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:16,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:16,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 21:38:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:16,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:38:16,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:16,409 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 7 [2023-11-24 21:38:16,470 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:38:16,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:38:16,510 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 21:38:16,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:16,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:16,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620891204] [2023-11-24 21:38:16,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620891204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:16,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:16,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517519756] [2023-11-24 21:38:16,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:16,559 INFO L87 Difference]: Start difference. First operand has 80 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 79 states have internal predecessors, (86), 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) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:38:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:16,953 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-11-24 21:38:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:38:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:16,966 INFO L225 Difference]: With dead ends: 76 [2023-11-24 21:38:16,966 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:38:16,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:38:16,972 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:16,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 60 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:38:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-11-24 21:38:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 73 states have internal predecessors, (79), 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 21:38:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2023-11-24 21:38:17,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 3 [2023-11-24 21:38:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:17,025 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2023-11-24 21:38:17,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:38:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2023-11-24 21:38:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:38:17,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:17,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:38:17,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:17,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:17,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash 161643, now seen corresponding path program 1 times [2023-11-24 21:38:17,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:17,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534157567] [2023-11-24 21:38:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:17,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:17,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 21:38:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:17,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:38:17,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:17,334 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 7 [2023-11-24 21:38:17,342 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 21:38:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:38:17,418 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 14 treesize of output 9 [2023-11-24 21:38:17,462 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:38:17,463 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 13 treesize of output 13 [2023-11-24 21:38:17,481 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 21:38:17,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:17,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:17,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534157567] [2023-11-24 21:38:17,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534157567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:17,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:17,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684449360] [2023-11-24 21:38:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:17,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:17,486 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:38:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:17,963 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2023-11-24 21:38:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:38:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:17,966 INFO L225 Difference]: With dead ends: 99 [2023-11-24 21:38:17,966 INFO L226 Difference]: Without dead ends: 99 [2023-11-24 21:38:17,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 21:38:17,968 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 73 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:17,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 65 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:38:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-24 21:38:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2023-11-24 21:38:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 79 states have internal predecessors, (91), 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 21:38:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-24 21:38:17,984 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 3 [2023-11-24 21:38:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:17,984 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-24 21:38:17,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 21:38:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-24 21:38:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:38:17,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:17,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:38:17,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-24 21:38:18,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:18,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 5010882, now seen corresponding path program 1 times [2023-11-24 21:38:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:18,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531682714] [2023-11-24 21:38:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:18,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:18,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:18,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:18,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 21:38:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:18,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:38:18,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:18,291 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 7 [2023-11-24 21:38:18,302 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 21:38:18,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:18,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:18,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531682714] [2023-11-24 21:38:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531682714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:18,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780151492] [2023-11-24 21:38:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:18,309 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 21:38:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:18,521 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2023-11-24 21:38:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:18,523 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), 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 4 [2023-11-24 21:38:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:18,524 INFO L225 Difference]: With dead ends: 76 [2023-11-24 21:38:18,524 INFO L226 Difference]: Without dead ends: 76 [2023-11-24 21:38:18,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:38:18,526 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:18,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-24 21:38:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-24 21:38:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 75 states have internal predecessors, (86), 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 21:38:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2023-11-24 21:38:18,534 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 4 [2023-11-24 21:38:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:18,534 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2023-11-24 21:38:18,535 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), 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 21:38:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2023-11-24 21:38:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:38:18,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:18,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:38:18,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-24 21:38:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:18,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:18,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 5010883, now seen corresponding path program 1 times [2023-11-24 21:38:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851212917] [2023-11-24 21:38:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:18,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:18,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:18,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 21:38:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:18,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:38:18,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:18,818 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 21:38:18,839 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 21:38:18,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:18,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:18,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851212917] [2023-11-24 21:38:18,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851212917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:18,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:18,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291356644] [2023-11-24 21:38:18,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:18,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:18,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:18,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:18,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:18,842 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 21:38:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:19,044 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-11-24 21:38:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:19,045 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), 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 4 [2023-11-24 21:38:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:19,046 INFO L225 Difference]: With dead ends: 72 [2023-11-24 21:38:19,046 INFO L226 Difference]: Without dead ends: 72 [2023-11-24 21:38:19,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:38:19,048 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:19,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 86 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-24 21:38:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-24 21:38:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 71 states have internal predecessors, (81), 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 21:38:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2023-11-24 21:38:19,063 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 4 [2023-11-24 21:38:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:19,063 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2023-11-24 21:38:19,064 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), 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 21:38:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2023-11-24 21:38:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:38:19,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:19,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:19,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-24 21:38:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:19,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2086236227, now seen corresponding path program 1 times [2023-11-24 21:38:19,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:19,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788908712] [2023-11-24 21:38:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:19,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:19,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:19,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 21:38:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:19,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:38:19,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:19,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:19,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:19,543 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 21:38:19,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:19,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788908712] [2023-11-24 21:38:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788908712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:19,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:38:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145934214] [2023-11-24 21:38:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:19,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:38:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:38:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:19,560 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 21:38:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:20,187 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-11-24 21:38:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:38:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 8 [2023-11-24 21:38:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:20,189 INFO L225 Difference]: With dead ends: 80 [2023-11-24 21:38:20,189 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 21:38:20,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:38:20,190 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 17 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:20,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 302 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:38:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 21:38:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2023-11-24 21:38:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 76 states have internal predecessors, (86), 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 21:38:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-24 21:38:20,198 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 8 [2023-11-24 21:38:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:20,198 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-24 21:38:20,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 21:38:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-24 21:38:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:38:20,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:20,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:20,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-24 21:38:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:20,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2086248360, now seen corresponding path program 1 times [2023-11-24 21:38:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:20,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689388856] [2023-11-24 21:38:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:20,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:20,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:20,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 21:38:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:20,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:38:20,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:20,531 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 21:38:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:38:20,627 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 14 treesize of output 9 [2023-11-24 21:38:20,640 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:38:20,640 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 13 treesize of output 13 [2023-11-24 21:38:20,667 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 21:38:20,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:20,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689388856] [2023-11-24 21:38:20,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689388856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:20,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:20,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739715694] [2023-11-24 21:38:20,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:20,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:20,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:20,670 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 21:38:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:20,944 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-24 21:38:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2023-11-24 21:38:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:20,946 INFO L225 Difference]: With dead ends: 76 [2023-11-24 21:38:20,946 INFO L226 Difference]: Without dead ends: 76 [2023-11-24 21:38:20,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:20,948 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:20,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 112 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-24 21:38:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-24 21:38:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 73 states have internal predecessors, (83), 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 21:38:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-11-24 21:38:20,954 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 8 [2023-11-24 21:38:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:20,954 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-11-24 21:38:20,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 21:38:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-11-24 21:38:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:38:20,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:20,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:20,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:21,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:21,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1991850737, now seen corresponding path program 1 times [2023-11-24 21:38:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:21,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859474688] [2023-11-24 21:38:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:21,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:21,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:21,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-24 21:38:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:21,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:38:21,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:21,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:21,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:38:21,441 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 21:38:21,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:21,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:21,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859474688] [2023-11-24 21:38:21,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859474688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:21,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:21,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:38:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492268705] [2023-11-24 21:38:21,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:21,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:21,444 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:38:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:22,074 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2023-11-24 21:38:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2023-11-24 21:38:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:22,075 INFO L225 Difference]: With dead ends: 92 [2023-11-24 21:38:22,076 INFO L226 Difference]: Without dead ends: 92 [2023-11-24 21:38:22,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:22,077 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:22,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 102 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:38:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-24 21:38:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2023-11-24 21:38:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 73 states have internal predecessors, (82), 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 21:38:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-11-24 21:38:22,085 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 13 [2023-11-24 21:38:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:22,085 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-11-24 21:38:22,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:38:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-11-24 21:38:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:38:22,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:22,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:22,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:22,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:22,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:22,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1991850738, now seen corresponding path program 1 times [2023-11-24 21:38:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:22,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619090421] [2023-11-24 21:38:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:22,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:22,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:22,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-24 21:38:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:22,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:38:22,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:22,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:22,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:22,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:38:22,688 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 21:38:22,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:22,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:22,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619090421] [2023-11-24 21:38:22,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619090421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:22,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:22,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:38:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349583355] [2023-11-24 21:38:22,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:22,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:22,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:22,691 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:38:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:23,328 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2023-11-24 21:38:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:38:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2023-11-24 21:38:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:23,330 INFO L225 Difference]: With dead ends: 87 [2023-11-24 21:38:23,330 INFO L226 Difference]: Without dead ends: 87 [2023-11-24 21:38:23,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:23,331 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:23,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 133 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:38:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-24 21:38:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2023-11-24 21:38:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.702127659574468) internal successors, (80), 72 states have internal predecessors, (80), 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 21:38:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-11-24 21:38:23,337 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 13 [2023-11-24 21:38:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:23,338 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-11-24 21:38:23,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 21:38:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-11-24 21:38:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:38:23,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:23,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:23,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-24 21:38:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:23,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:23,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1991836803, now seen corresponding path program 1 times [2023-11-24 21:38:23,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:23,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343450139] [2023-11-24 21:38:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:23,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:23,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-24 21:38:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:23,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:38:23,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:23,703 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 21:38:23,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:23,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343450139] [2023-11-24 21:38:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343450139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:23,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585283773] [2023-11-24 21:38:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:23,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:23,707 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:38:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:23,933 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2023-11-24 21:38:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-11-24 21:38:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:23,936 INFO L225 Difference]: With dead ends: 105 [2023-11-24 21:38:23,936 INFO L226 Difference]: Without dead ends: 105 [2023-11-24 21:38:23,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:23,937 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:23,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:38:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-24 21:38:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2023-11-24 21:38:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.65) internal successors, (99), 85 states have internal predecessors, (99), 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 21:38:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2023-11-24 21:38:23,944 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 13 [2023-11-24 21:38:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:23,944 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2023-11-24 21:38:23,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:38:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2023-11-24 21:38:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:38:23,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:23,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:23,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:24,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:24,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:24,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1386795632, now seen corresponding path program 1 times [2023-11-24 21:38:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:24,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426899753] [2023-11-24 21:38:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:24,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:24,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-24 21:38:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:24,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:38:24,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:24,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:24,468 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 21:38:24,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:24,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:24,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426899753] [2023-11-24 21:38:24,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426899753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:24,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:24,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:24,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626924676] [2023-11-24 21:38:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:24,471 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 21:38:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:24,773 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2023-11-24 21:38:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-24 21:38:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:24,776 INFO L225 Difference]: With dead ends: 97 [2023-11-24 21:38:24,776 INFO L226 Difference]: Without dead ends: 97 [2023-11-24 21:38:24,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:38:24,777 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:24,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 117 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:38:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-24 21:38:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2023-11-24 21:38:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 84 states have internal predecessors, (97), 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 21:38:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2023-11-24 21:38:24,783 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 15 [2023-11-24 21:38:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:24,783 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2023-11-24 21:38:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 21:38:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2023-11-24 21:38:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:38:24,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:24,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:24,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:24,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:24,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:24,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash -40991519, now seen corresponding path program 1 times [2023-11-24 21:38:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:24,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542497705] [2023-11-24 21:38:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:24,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:24,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:24,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:24,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-24 21:38:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:25,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:38:25,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:25,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:25,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:38:25,493 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 21:38:25,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:38:25,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542497705] [2023-11-24 21:38:25,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542497705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:25,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:25,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667706547] [2023-11-24 21:38:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:38:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:38:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:38:25,495 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 21:38:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:26,143 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2023-11-24 21:38:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:38:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-24 21:38:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:26,145 INFO L225 Difference]: With dead ends: 96 [2023-11-24 21:38:26,145 INFO L226 Difference]: Without dead ends: 96 [2023-11-24 21:38:26,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:38:26,146 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:26,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 95 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:38:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-24 21:38:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2023-11-24 21:38:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 83 states have internal predecessors, (95), 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 21:38:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2023-11-24 21:38:26,151 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2023-11-24 21:38:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:26,152 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2023-11-24 21:38:26,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 21:38:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2023-11-24 21:38:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:38:26,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:26,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:26,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:26,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:26,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 467993133, now seen corresponding path program 1 times [2023-11-24 21:38:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815538260] [2023-11-24 21:38:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:26,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:26,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-24 21:38:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:26,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:38:26,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:26,603 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 21:38:26,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:26,709 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-24 21:38:26,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2023-11-24 21:38:26,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:38:26,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:26,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:38:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:26,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:27,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-24 21:38:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:27,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:27,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815538260] [2023-11-24 21:38:27,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815538260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:38:27,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:38:27,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2023-11-24 21:38:27,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651487293] [2023-11-24 21:38:27,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:27,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:38:27,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:38:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:38:27,325 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 21:38:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:38:28,857 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-11-24 21:38:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:38:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 16 [2023-11-24 21:38:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:38:28,859 INFO L225 Difference]: With dead ends: 97 [2023-11-24 21:38:28,860 INFO L226 Difference]: Without dead ends: 97 [2023-11-24 21:38:28,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:38:28,861 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:38:28,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 278 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-24 21:38:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-24 21:38:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2023-11-24 21:38:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 82 states have internal predecessors, (94), 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 21:38:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-11-24 21:38:28,866 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2023-11-24 21:38:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:38:28,867 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-11-24 21:38:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 21:38:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-11-24 21:38:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:38:28,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:38:28,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:28,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:29,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:29,072 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:38:29,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 467993134, now seen corresponding path program 1 times [2023-11-24 21:38:29,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:38:29,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929919482] [2023-11-24 21:38:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:29,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:38:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:38:29,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:38:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02ba9cff-1fa4-46f2-a368-728922832f00/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-24 21:38:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:29,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:38:29,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:29,348 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 21:38:29,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:29,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:29,519 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-24 21:38:29,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2023-11-24 21:38:29,568 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-11-24 21:38:29,568 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 17 treesize of output 17 [2023-11-24 21:38:29,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:38:29,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:38:29,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:38:29,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:38:29,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-11-24 21:38:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:29,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:35,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-11-24 21:38:35,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-11-24 21:38:35,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-11-24 21:38:38,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:38:38,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 193 treesize of output 457 [2023-11-24 21:38:41,091 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 24 treesize of output 22 [2023-11-24 21:38:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:41,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:38:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929919482] [2023-11-24 21:38:41,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929919482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:38:41,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:38:41,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-24 21:38:41,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274436346] [2023-11-24 21:38:41,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:41,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:38:41,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:38:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:38:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:38:41,274 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 states have internal predecessors, (31), 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)