./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-queue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme --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 c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:58,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:58,732 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:42:58,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:58,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:58,779 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:58,780 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:58,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:58,782 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:58,787 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:58,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:58,788 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:58,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:58,791 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:58,792 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:58,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:58,793 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:58,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:58,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:58,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:58,795 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:42:58,795 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:42:58,796 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:42:58,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:58,797 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:42:58,797 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:42:58,798 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:58,798 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:58,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:58,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:58,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:58,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:58,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:58,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:58,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:58,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:58,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:58,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:58,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:58,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:58,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:58,805 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_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 [2023-11-26 10:42:59,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:59,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:59,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:59,101 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:59,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:59,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/forester-heap/dll-queue-1.i [2023-11-26 10:43:02,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:43:02,546 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:43:02,547 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/sv-benchmarks/c/forester-heap/dll-queue-1.i [2023-11-26 10:43:02,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/data/333e0a153/7616224419244eb08db83efb9fc316f3/FLAGeaf3c5b47 [2023-11-26 10:43:02,580 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/data/333e0a153/7616224419244eb08db83efb9fc316f3 [2023-11-26 10:43:02,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:43:02,589 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:43:02,593 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:02,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:43:02,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:43:02,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677f50d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:02, skipping insertion in model container [2023-11-26 10:43:02,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:02" (1/1) ... [2023-11-26 10:43:02,669 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:43:02,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:02,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:43:03,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:03,063 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:43:03,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03 WrapperNode [2023-11-26 10:43:03,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:03,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:03,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:43:03,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:43:03,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,152 INFO L138 Inliner]: procedures = 119, calls = 52, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 227 [2023-11-26 10:43:03,153 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:03,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:43:03,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:43:03,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:43:03,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,170 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,201 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 9 writes are split as follows [0, 9]. [2023-11-26 10:43:03,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,240 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:43:03,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:43:03,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:43:03,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:43:03,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (1/1) ... [2023-11-26 10:43:03,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:03,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:43:03,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:43:03,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-26 10:43:03,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-26 10:43:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:43:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:43:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:43:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:43:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:43:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:43:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:43:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:43:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:43:03,461 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:43:03,464 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:43:04,000 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:43:04,047 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:43:04,047 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-26 10:43:04,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:04 BoogieIcfgContainer [2023-11-26 10:43:04,048 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:43:04,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:43:04,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:43:04,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:43:04,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:43:02" (1/3) ... [2023-11-26 10:43:04,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471822e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:04, skipping insertion in model container [2023-11-26 10:43:04,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:03" (2/3) ... [2023-11-26 10:43:04,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471822e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:04, skipping insertion in model container [2023-11-26 10:43:04,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:04" (3/3) ... [2023-11-26 10:43:04,057 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-queue-1.i [2023-11-26 10:43:04,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:43:04,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 63 error locations. [2023-11-26 10:43:04,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:04,136 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;@457bb2a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:04,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-11-26 10:43:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 94 states have (on average 2.276595744680851) internal successors, (214), 157 states have internal predecessors, (214), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-26 10:43:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-26 10:43:04,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:04,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-26 10:43:04,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:04,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash 15978, now seen corresponding path program 1 times [2023-11-26 10:43:04,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:04,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702975174] [2023-11-26 10:43:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:04,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702975174] [2023-11-26 10:43:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702975174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:04,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:04,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:43:04,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289361437] [2023-11-26 10:43:04,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:04,406 INFO L87 Difference]: Start difference. First operand has 173 states, 94 states have (on average 2.276595744680851) internal successors, (214), 157 states have internal predecessors, (214), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-26 10:43:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:04,667 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2023-11-26 10:43:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-26 10:43:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:04,679 INFO L225 Difference]: With dead ends: 152 [2023-11-26 10:43:04,679 INFO L226 Difference]: Without dead ends: 151 [2023-11-26 10:43:04,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:04,685 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:04,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 102 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-26 10:43:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2023-11-26 10:43:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 145 states have internal predecessors, (158), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2023-11-26 10:43:04,732 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 2 [2023-11-26 10:43:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:04,733 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2023-11-26 10:43:04,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-26 10:43:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2023-11-26 10:43:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-26 10:43:04,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:04,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-26 10:43:04,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:43:04,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:04,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 15979, now seen corresponding path program 1 times [2023-11-26 10:43:04,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:04,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021770515] [2023-11-26 10:43:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:04,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021770515] [2023-11-26 10:43:04,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021770515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:04,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:04,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:43:04,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148171687] [2023-11-26 10:43:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:04,844 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-26 10:43:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:05,061 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2023-11-26 10:43:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:05,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-26 10:43:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:05,064 INFO L225 Difference]: With dead ends: 139 [2023-11-26 10:43:05,064 INFO L226 Difference]: Without dead ends: 139 [2023-11-26 10:43:05,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:05,066 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 130 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:05,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 107 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-26 10:43:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2023-11-26 10:43:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 81 states have (on average 1.8024691358024691) internal successors, (146), 134 states have internal predecessors, (146), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2023-11-26 10:43:05,080 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 2 [2023-11-26 10:43:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:05,081 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2023-11-26 10:43:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-26 10:43:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2023-11-26 10:43:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 10:43:05,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:05,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:05,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:43:05,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:05,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2125466043, now seen corresponding path program 1 times [2023-11-26 10:43:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:05,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551683390] [2023-11-26 10:43:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551683390] [2023-11-26 10:43:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551683390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:05,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:05,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:05,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053222151] [2023-11-26 10:43:05,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:05,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:05,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:05,266 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-26 10:43:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:05,478 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2023-11-26 10:43:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:05,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-26 10:43:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:05,483 INFO L225 Difference]: With dead ends: 143 [2023-11-26 10:43:05,484 INFO L226 Difference]: Without dead ends: 143 [2023-11-26 10:43:05,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:05,491 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 225 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:05,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 110 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-26 10:43:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2023-11-26 10:43:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 87 states have (on average 1.7241379310344827) internal successors, (150), 134 states have internal predecessors, (150), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 164 transitions. [2023-11-26 10:43:05,518 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 164 transitions. Word has length 7 [2023-11-26 10:43:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:05,519 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 164 transitions. [2023-11-26 10:43:05,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-26 10:43:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 164 transitions. [2023-11-26 10:43:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 10:43:05,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:05,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:05,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:43:05,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:05,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2125466042, now seen corresponding path program 1 times [2023-11-26 10:43:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523748918] [2023-11-26 10:43:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523748918] [2023-11-26 10:43:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523748918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:05,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119410282] [2023-11-26 10:43:05,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:43:05,837 INFO L87 Difference]: Start difference. First operand 136 states and 164 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2023-11-26 10:43:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:06,243 INFO L93 Difference]: Finished difference Result 217 states and 257 transitions. [2023-11-26 10:43:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2023-11-26 10:43:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:06,246 INFO L225 Difference]: With dead ends: 217 [2023-11-26 10:43:06,246 INFO L226 Difference]: Without dead ends: 217 [2023-11-26 10:43:06,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:43:06,247 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 279 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:06,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 200 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:43:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-26 10:43:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 142. [2023-11-26 10:43:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 93 states have (on average 1.6989247311827957) internal successors, (158), 140 states have internal predecessors, (158), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2023-11-26 10:43:06,266 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 7 [2023-11-26 10:43:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:06,267 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2023-11-26 10:43:06,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2023-11-26 10:43:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2023-11-26 10:43:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:43:06,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:06,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:06,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:43:06,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:06,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:06,269 INFO L85 PathProgramCache]: Analyzing trace with hash 945106439, now seen corresponding path program 1 times [2023-11-26 10:43:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:06,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825549231] [2023-11-26 10:43:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:06,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:06,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825549231] [2023-11-26 10:43:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825549231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:06,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:06,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:43:06,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484271448] [2023-11-26 10:43:06,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:06,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:06,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:06,350 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:06,415 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2023-11-26 10:43:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 10:43:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:06,417 INFO L225 Difference]: With dead ends: 137 [2023-11-26 10:43:06,417 INFO L226 Difference]: Without dead ends: 137 [2023-11-26 10:43:06,417 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 [2023-11-26 10:43:06,419 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 112 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:06,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 133 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-26 10:43:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-26 10:43:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 93 states have (on average 1.6344086021505377) internal successors, (152), 135 states have internal predecessors, (152), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2023-11-26 10:43:06,442 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 10 [2023-11-26 10:43:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:06,443 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2023-11-26 10:43:06,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2023-11-26 10:43:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 10:43:06,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:06,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:06,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:43:06,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:06,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:06,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1831998218, now seen corresponding path program 1 times [2023-11-26 10:43:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:06,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496555326] [2023-11-26 10:43:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:06,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496555326] [2023-11-26 10:43:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496555326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:06,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:06,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117797980] [2023-11-26 10:43:06,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:06,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:06,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:06,658 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-11-26 10:43:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:06,833 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2023-11-26 10:43:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2023-11-26 10:43:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:06,836 INFO L225 Difference]: With dead ends: 136 [2023-11-26 10:43:06,837 INFO L226 Difference]: Without dead ends: 136 [2023-11-26 10:43:06,837 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 [2023-11-26 10:43:06,839 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 6 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:06,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 384 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-26 10:43:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-26 10:43:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 93 states have (on average 1.6129032258064515) internal successors, (150), 134 states have internal predecessors, (150), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2023-11-26 10:43:06,852 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 9 [2023-11-26 10:43:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:06,852 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2023-11-26 10:43:06,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-11-26 10:43:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2023-11-26 10:43:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 10:43:06,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:06,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:06,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:43:06,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:06,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1831998219, now seen corresponding path program 1 times [2023-11-26 10:43:06,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:06,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874474116] [2023-11-26 10:43:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:06,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:07,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:07,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874474116] [2023-11-26 10:43:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874474116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:07,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:07,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:07,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151515584] [2023-11-26 10:43:07,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:07,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:07,073 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-11-26 10:43:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:07,243 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2023-11-26 10:43:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:07,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2023-11-26 10:43:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:07,245 INFO L225 Difference]: With dead ends: 135 [2023-11-26 10:43:07,245 INFO L226 Difference]: Without dead ends: 135 [2023-11-26 10:43:07,245 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 [2023-11-26 10:43:07,246 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 3 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:07,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 384 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-26 10:43:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-26 10:43:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.5913978494623655) internal successors, (148), 133 states have internal predecessors, (148), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2023-11-26 10:43:07,251 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 9 [2023-11-26 10:43:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:07,251 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2023-11-26 10:43:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-11-26 10:43:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2023-11-26 10:43:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:43:07,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:07,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:07,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:43:07,256 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:07,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash -385860111, now seen corresponding path program 1 times [2023-11-26 10:43:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:07,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948388865] [2023-11-26 10:43:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:07,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:07,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948388865] [2023-11-26 10:43:07,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948388865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:07,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:07,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:43:07,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966081117] [2023-11-26 10:43:07,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:07,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:43:07,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:07,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:43:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:43:07,577 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-11-26 10:43:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:07,909 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2023-11-26 10:43:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:43:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 11 [2023-11-26 10:43:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:07,911 INFO L225 Difference]: With dead ends: 137 [2023-11-26 10:43:07,911 INFO L226 Difference]: Without dead ends: 137 [2023-11-26 10:43:07,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:07,912 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 214 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:07,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 306 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:43:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-26 10:43:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2023-11-26 10:43:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 93 states have (on average 1.5806451612903225) internal successors, (147), 132 states have internal predecessors, (147), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-11-26 10:43:07,917 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 11 [2023-11-26 10:43:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-11-26 10:43:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-11-26 10:43:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-11-26 10:43:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:43:07,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:07,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:07,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:43:07,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:07,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -385860110, now seen corresponding path program 1 times [2023-11-26 10:43:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836286630] [2023-11-26 10:43:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836286630] [2023-11-26 10:43:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836286630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:08,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:43:08,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963763209] [2023-11-26 10:43:08,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:43:08,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:43:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:43:08,325 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-26 10:43:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:08,955 INFO L93 Difference]: Finished difference Result 191 states and 221 transitions. [2023-11-26 10:43:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:43:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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 11 [2023-11-26 10:43:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:08,957 INFO L225 Difference]: With dead ends: 191 [2023-11-26 10:43:08,957 INFO L226 Difference]: Without dead ends: 191 [2023-11-26 10:43:08,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:43:08,958 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 277 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:08,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 515 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:43:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-26 10:43:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2023-11-26 10:43:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 87 states have (on average 1.528735632183908) internal successors, (133), 119 states have internal predecessors, (133), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2023-11-26 10:43:08,963 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 11 [2023-11-26 10:43:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:08,963 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2023-11-26 10:43:08,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-26 10:43:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2023-11-26 10:43:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:43:08,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:08,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:08,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:43:08,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:08,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:08,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1590650999, now seen corresponding path program 1 times [2023-11-26 10:43:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279789501] [2023-11-26 10:43:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:08,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:08,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279789501] [2023-11-26 10:43:08,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279789501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:08,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:08,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588831219] [2023-11-26 10:43:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:09,000 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:09,054 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2023-11-26 10:43:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:09,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-26 10:43:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:09,057 INFO L225 Difference]: With dead ends: 170 [2023-11-26 10:43:09,057 INFO L226 Difference]: Without dead ends: 170 [2023-11-26 10:43:09,057 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 [2023-11-26 10:43:09,058 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 41 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:09,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 220 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:43:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-26 10:43:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 134. [2023-11-26 10:43:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 100 states have (on average 1.47) internal successors, (147), 132 states have internal predecessors, (147), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-11-26 10:43:09,063 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 16 [2023-11-26 10:43:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:09,064 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-11-26 10:43:09,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-11-26 10:43:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:43:09,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:09,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:09,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:43:09,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:09,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:09,066 INFO L85 PathProgramCache]: Analyzing trace with hash 271995679, now seen corresponding path program 1 times [2023-11-26 10:43:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:09,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527671591] [2023-11-26 10:43:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527671591] [2023-11-26 10:43:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527671591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:09,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:43:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536255630] [2023-11-26 10:43:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:09,250 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 5 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) [2023-11-26 10:43:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:09,376 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2023-11-26 10:43:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:43:09,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2023-11-26 10:43:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:09,378 INFO L225 Difference]: With dead ends: 141 [2023-11-26 10:43:09,378 INFO L226 Difference]: Without dead ends: 141 [2023-11-26 10:43:09,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:43:09,379 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 10 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:09,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 418 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-26 10:43:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2023-11-26 10:43:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 136 states have internal predecessors, (151), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2023-11-26 10:43:09,388 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 18 [2023-11-26 10:43:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:09,388 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2023-11-26 10:43:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2023-11-26 10:43:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2023-11-26 10:43:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:43:09,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:09,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:09,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:43:09,390 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:09,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:09,391 INFO L85 PathProgramCache]: Analyzing trace with hash 275840090, now seen corresponding path program 1 times [2023-11-26 10:43:09,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:09,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244495626] [2023-11-26 10:43:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:09,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244495626] [2023-11-26 10:43:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244495626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:09,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:43:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773327701] [2023-11-26 10:43:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:43:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:43:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:43:09,630 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:09,957 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2023-11-26 10:43:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:43:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 10:43:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:09,959 INFO L225 Difference]: With dead ends: 210 [2023-11-26 10:43:09,960 INFO L226 Difference]: Without dead ends: 210 [2023-11-26 10:43:09,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:43:09,960 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 272 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:09,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 470 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:43:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-26 10:43:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 142. [2023-11-26 10:43:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 140 states have internal predecessors, (155), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2023-11-26 10:43:09,966 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 19 [2023-11-26 10:43:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:09,966 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2023-11-26 10:43:09,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2023-11-26 10:43:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:43:09,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:09,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:09,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:43:09,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:09,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash -101384236, now seen corresponding path program 1 times [2023-11-26 10:43:09,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:09,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196773847] [2023-11-26 10:43:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:10,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196773847] [2023-11-26 10:43:10,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196773847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:10,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172035353] [2023-11-26 10:43:10,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:10,037 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-11-26 10:43:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:10,170 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2023-11-26 10:43:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2023-11-26 10:43:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:10,171 INFO L225 Difference]: With dead ends: 142 [2023-11-26 10:43:10,171 INFO L226 Difference]: Without dead ends: 142 [2023-11-26 10:43:10,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:10,172 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 110 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:10,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 262 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-26 10:43:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-26 10:43:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 108 states have (on average 1.4259259259259258) internal successors, (154), 140 states have internal predecessors, (154), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2023-11-26 10:43:10,177 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 19 [2023-11-26 10:43:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:10,177 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2023-11-26 10:43:10,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-11-26 10:43:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2023-11-26 10:43:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 10:43:10,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:10,178 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:10,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:43:10,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:10,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -975301181, now seen corresponding path program 1 times [2023-11-26 10:43:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:10,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928195959] [2023-11-26 10:43:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928195959] [2023-11-26 10:43:10,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928195959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673526526] [2023-11-26 10:43:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:10,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:10,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:10,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:43:10,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:10,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673526526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:10,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:10,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-26 10:43:10,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115725174] [2023-11-26 10:43:10,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:43:10,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:43:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:43:10,676 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2023-11-26 10:43:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:11,015 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2023-11-26 10:43:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:43:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 22 [2023-11-26 10:43:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:11,017 INFO L225 Difference]: With dead ends: 167 [2023-11-26 10:43:11,017 INFO L226 Difference]: Without dead ends: 167 [2023-11-26 10:43:11,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:43:11,018 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 127 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:11,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 459 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-26 10:43:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2023-11-26 10:43:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 117 states have (on average 1.4017094017094016) internal successors, (164), 149 states have internal predecessors, (164), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2023-11-26 10:43:11,024 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 22 [2023-11-26 10:43:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:11,025 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2023-11-26 10:43:11,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2023-11-26 10:43:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2023-11-26 10:43:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:43:11,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:11,027 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, 1, 1] [2023-11-26 10:43:11,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:43:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:11,232 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:11,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -169566645, now seen corresponding path program 1 times [2023-11-26 10:43:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784194795] [2023-11-26 10:43:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:11,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784194795] [2023-11-26 10:43:11,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784194795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005539051] [2023-11-26 10:43:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:11,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:11,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:43:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:43:11,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:11,505 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 13 treesize of output 9 [2023-11-26 10:43:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:11,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:11,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005539051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:11,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-26 10:43:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89400569] [2023-11-26 10:43:11,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:43:11,573 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2023-11-26 10:43:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:11,742 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2023-11-26 10:43:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 23 [2023-11-26 10:43:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:11,744 INFO L225 Difference]: With dead ends: 160 [2023-11-26 10:43:11,744 INFO L226 Difference]: Without dead ends: 143 [2023-11-26 10:43:11,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:43:11,745 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 10 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:11,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 353 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-26 10:43:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-26 10:43:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 109 states have (on average 1.4220183486238531) internal successors, (155), 141 states have internal predecessors, (155), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2023-11-26 10:43:11,750 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 23 [2023-11-26 10:43:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:11,750 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2023-11-26 10:43:11,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2023-11-26 10:43:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2023-11-26 10:43:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:43:11,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:11,751 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:11,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:11,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:43:11,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:11,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1408130527, now seen corresponding path program 1 times [2023-11-26 10:43:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037391187] [2023-11-26 10:43:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:12,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037391187] [2023-11-26 10:43:12,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037391187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:12,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593316708] [2023-11-26 10:43:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:12,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:12,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:12,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:43:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:12,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:43:12,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:12,580 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 [2023-11-26 10:43:12,685 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:12,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:12,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:12,839 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:12,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-26 10:43:12,909 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:12,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 23 [2023-11-26 10:43:12,950 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:12,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-26 10:43:13,047 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 24 treesize of output 12 [2023-11-26 10:43:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:13,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:13,083 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_482) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2023-11-26 10:43:13,146 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int)) (v_ArrVal_482 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_480))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_482)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2023-11-26 10:43:13,156 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int)) (v_ArrVal_482 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_480))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_482)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2023-11-26 10:43:13,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:13,167 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-11-26 10:43:13,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:13,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 245 treesize of output 220 [2023-11-26 10:43:13,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:13,213 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 144 treesize of output 141 [2023-11-26 10:43:13,223 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 132 treesize of output 126 [2023-11-26 10:43:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593316708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:13,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:13,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 25 [2023-11-26 10:43:13,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630871015] [2023-11-26 10:43:13,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:13,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 10:43:13,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 10:43:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=395, Unknown=7, NotChecked=126, Total=600 [2023-11-26 10:43:13,557 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:14,620 INFO L93 Difference]: Finished difference Result 252 states and 295 transitions. [2023-11-26 10:43:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:43:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-26 10:43:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:14,622 INFO L225 Difference]: With dead ends: 252 [2023-11-26 10:43:14,623 INFO L226 Difference]: Without dead ends: 252 [2023-11-26 10:43:14,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=704, Unknown=7, NotChecked=174, Total=1056 [2023-11-26 10:43:14,624 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 974 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 746 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:14,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1045 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 943 Invalid, 0 Unknown, 746 Unchecked, 0.7s Time] [2023-11-26 10:43:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-26 10:43:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 153. [2023-11-26 10:43:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 119 states have (on average 1.403361344537815) internal successors, (167), 151 states have internal predecessors, (167), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2023-11-26 10:43:14,631 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 29 [2023-11-26 10:43:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:14,631 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2023-11-26 10:43:14,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2023-11-26 10:43:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 10:43:14,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:14,633 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:14,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:43:14,841 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:14,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1521654695, now seen corresponding path program 1 times [2023-11-26 10:43:14,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:14,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435604904] [2023-11-26 10:43:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:14,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:14,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435604904] [2023-11-26 10:43:14,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435604904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:14,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:14,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:14,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478421308] [2023-11-26 10:43:14,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:14,924 INFO L87 Difference]: Start difference. First operand 153 states and 176 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:14,987 INFO L93 Difference]: Finished difference Result 218 states and 249 transitions. [2023-11-26 10:43:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:14,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-26 10:43:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:14,991 INFO L225 Difference]: With dead ends: 218 [2023-11-26 10:43:14,991 INFO L226 Difference]: Without dead ends: 218 [2023-11-26 10:43:14,992 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 [2023-11-26 10:43:14,993 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 49 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:14,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 220 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-26 10:43:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 171. [2023-11-26 10:43:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 169 states have internal predecessors, (186), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2023-11-26 10:43:15,000 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 30 [2023-11-26 10:43:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:15,000 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2023-11-26 10:43:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2023-11-26 10:43:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:43:15,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:15,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:43:15,003 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:15,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 706251702, now seen corresponding path program 1 times [2023-11-26 10:43:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633890170] [2023-11-26 10:43:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:15,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633890170] [2023-11-26 10:43:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633890170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13541000] [2023-11-26 10:43:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:15,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:15,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:15,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:43:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:15,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 10:43:15,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:15,464 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 [2023-11-26 10:43:15,484 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 [2023-11-26 10:43:15,527 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 [2023-11-26 10:43:15,558 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:15,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13541000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:15,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:15,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-11-26 10:43:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103465246] [2023-11-26 10:43:15,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:15,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:43:15,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:43:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:15,715 INFO L87 Difference]: Start difference. First operand 171 states and 195 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:16,062 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2023-11-26 10:43:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:43:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-26 10:43:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:16,065 INFO L225 Difference]: With dead ends: 220 [2023-11-26 10:43:16,065 INFO L226 Difference]: Without dead ends: 220 [2023-11-26 10:43:16,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:43:16,066 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 663 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:16,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 343 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:43:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-26 10:43:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 170. [2023-11-26 10:43:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 168 states have internal predecessors, (184), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2023-11-26 10:43:16,073 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 33 [2023-11-26 10:43:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:16,073 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2023-11-26 10:43:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2023-11-26 10:43:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:43:16,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:16,074 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:16,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:16,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:43:16,275 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:16,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 232211828, now seen corresponding path program 1 times [2023-11-26 10:43:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:16,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76613596] [2023-11-26 10:43:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:16,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76613596] [2023-11-26 10:43:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76613596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:16,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250857201] [2023-11-26 10:43:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:16,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:16,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:43:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:16,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 10:43:16,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:16,952 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 [2023-11-26 10:43:17,043 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:43:17,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:43:17,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:17,213 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:17,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:17,282 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:17,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 24 [2023-11-26 10:43:17,327 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:17,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:17,520 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 [2023-11-26 10:43:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:17,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:17,725 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_774 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_774) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2023-11-26 10:43:17,736 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_772 (Array Int Int)) (v_ArrVal_774 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_772))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_774)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2023-11-26 10:43:17,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:17,797 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2023-11-26 10:43:17,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:17,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 252 treesize of output 227 [2023-11-26 10:43:17,823 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 171 treesize of output 163 [2023-11-26 10:43:17,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:17,838 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 163 treesize of output 159 [2023-11-26 10:43:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250857201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:19,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:19,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 27 [2023-11-26 10:43:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158372037] [2023-11-26 10:43:19,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 10:43:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 10:43:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=495, Unknown=12, NotChecked=98, Total=756 [2023-11-26 10:43:19,062 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 28 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 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) [2023-11-26 10:43:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:20,143 INFO L93 Difference]: Finished difference Result 298 states and 341 transitions. [2023-11-26 10:43:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:43:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 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 36 [2023-11-26 10:43:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:20,146 INFO L225 Difference]: With dead ends: 298 [2023-11-26 10:43:20,146 INFO L226 Difference]: Without dead ends: 298 [2023-11-26 10:43:20,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=954, Unknown=12, NotChecked=138, Total=1406 [2023-11-26 10:43:20,147 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 775 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:20,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 515 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 597 Invalid, 0 Unknown, 586 Unchecked, 0.8s Time] [2023-11-26 10:43:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-26 10:43:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 180. [2023-11-26 10:43:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 147 states have (on average 1.346938775510204) internal successors, (198), 178 states have internal predecessors, (198), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2023-11-26 10:43:20,158 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 36 [2023-11-26 10:43:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:20,159 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2023-11-26 10:43:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 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) [2023-11-26 10:43:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2023-11-26 10:43:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:43:20,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:20,160 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:20,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:20,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:20,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 232211829, now seen corresponding path program 1 times [2023-11-26 10:43:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:20,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921896326] [2023-11-26 10:43:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:21,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921896326] [2023-11-26 10:43:21,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921896326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:21,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969469099] [2023-11-26 10:43:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:21,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:21,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:43:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:21,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 10:43:21,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:21,249 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 [2023-11-26 10:43:21,320 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:21,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:21,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-26 10:43:21,372 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 [2023-11-26 10:43:21,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:21,501 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:21,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:43:21,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:21,568 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:21,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 24 [2023-11-26 10:43:21,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:43:21,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-26 10:43:21,611 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:21,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:43:21,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:21,804 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 [2023-11-26 10:43:21,808 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 [2023-11-26 10:43:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:21,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:21,973 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_877 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_877) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_876) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_877 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_877) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 8)))) is different from false [2023-11-26 10:43:22,076 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_877 (Array Int Int)) (v_ArrVal_872 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_873))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ 12 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_872) .cse0 v_ArrVal_877) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_876) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_877 (Array Int Int)) (v_ArrVal_872 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (<= 0 (+ 8 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_872) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_873) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_877) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2023-11-26 10:43:22,093 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_877 (Array Int Int)) (v_ArrVal_872 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_872) (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_873) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_877) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 8))) (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_877 (Array Int Int)) (v_ArrVal_872 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_873))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_872) .cse1 v_ArrVal_877) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 12) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_876) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))))) is different from false [2023-11-26 10:43:22,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,106 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2023-11-26 10:43:22,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,114 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2023-11-26 10:43:22,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 334 treesize of output 301 [2023-11-26 10:43:22,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 826 treesize of output 793 [2023-11-26 10:43:22,191 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 180 treesize of output 172 [2023-11-26 10:43:22,205 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 172 treesize of output 164 [2023-11-26 10:43:22,216 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 84 treesize of output 80 [2023-11-26 10:43:22,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,232 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 160 treesize of output 150 [2023-11-26 10:43:22,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,447 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-11-26 10:43:22,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:22,456 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-26 10:43:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:22,462 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 28 treesize of output 20 [2023-11-26 10:43:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:22,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-26 10:43:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:22,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969469099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:22,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:22,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 27 [2023-11-26 10:43:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989180020] [2023-11-26 10:43:22,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 10:43:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 10:43:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=505, Unknown=9, NotChecked=144, Total=756 [2023-11-26 10:43:22,615 INFO L87 Difference]: Start difference. First operand 180 states and 206 transitions. Second operand has 28 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 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) [2023-11-26 10:43:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:24,111 INFO L93 Difference]: Finished difference Result 286 states and 327 transitions. [2023-11-26 10:43:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:43:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 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 36 [2023-11-26 10:43:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:24,113 INFO L225 Difference]: With dead ends: 286 [2023-11-26 10:43:24,113 INFO L226 Difference]: Without dead ends: 286 [2023-11-26 10:43:24,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=1241, Unknown=9, NotChecked=234, Total=1806 [2023-11-26 10:43:24,115 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 526 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:24,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 788 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1040 Invalid, 0 Unknown, 824 Unchecked, 1.0s Time] [2023-11-26 10:43:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-26 10:43:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 183. [2023-11-26 10:43:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 150 states have (on average 1.34) internal successors, (201), 181 states have internal predecessors, (201), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 209 transitions. [2023-11-26 10:43:24,122 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 209 transitions. Word has length 36 [2023-11-26 10:43:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:24,123 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 209 transitions. [2023-11-26 10:43:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 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) [2023-11-26 10:43:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 209 transitions. [2023-11-26 10:43:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:43:24,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:24,124 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:24,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 10:43:24,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:24,331 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:24,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1370959522, now seen corresponding path program 1 times [2023-11-26 10:43:24,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:24,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565678165] [2023-11-26 10:43:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565678165] [2023-11-26 10:43:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565678165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:24,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167356425] [2023-11-26 10:43:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:24,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:24,385 INFO L87 Difference]: Start difference. First operand 183 states and 209 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:24,421 INFO L93 Difference]: Finished difference Result 184 states and 209 transitions. [2023-11-26 10:43:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-26 10:43:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:24,423 INFO L225 Difference]: With dead ends: 184 [2023-11-26 10:43:24,423 INFO L226 Difference]: Without dead ends: 184 [2023-11-26 10:43:24,424 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 [2023-11-26 10:43:24,424 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:24,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:43:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-26 10:43:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-26 10:43:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 151 states have (on average 1.3311258278145695) internal successors, (201), 182 states have internal predecessors, (201), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2023-11-26 10:43:24,430 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 39 [2023-11-26 10:43:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:24,431 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2023-11-26 10:43:24,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2023-11-26 10:43:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:43:24,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:24,432 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:24,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 10:43:24,433 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:24,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash 579373491, now seen corresponding path program 1 times [2023-11-26 10:43:24,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:24,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188729899] [2023-11-26 10:43:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:24,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:25,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:25,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188729899] [2023-11-26 10:43:25,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188729899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:25,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334195406] [2023-11-26 10:43:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:25,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:25,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:25,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:43:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:26,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-26 10:43:26,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:26,090 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 [2023-11-26 10:43:26,179 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:26,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:26,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-26 10:43:26,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:26,242 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 [2023-11-26 10:43:26,390 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:26,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:43:26,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:26,475 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:26,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 24 [2023-11-26 10:43:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:43:26,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-26 10:43:26,580 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:26,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 90 [2023-11-26 10:43:26,588 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 31 treesize of output 1 [2023-11-26 10:43:26,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 9 [2023-11-26 10:43:26,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:26,804 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 27 treesize of output 15 [2023-11-26 10:43:26,810 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 [2023-11-26 10:43:26,867 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 15 treesize of output 7 [2023-11-26 10:43:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:26,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:26,985 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 72 treesize of output 52 [2023-11-26 10:43:27,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:27,601 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 56 [2023-11-26 10:43:27,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:27,608 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 52 [2023-11-26 10:43:27,612 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 89 treesize of output 73 [2023-11-26 10:43:27,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:27,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 132 treesize of output 131 [2023-11-26 10:43:27,637 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 96 treesize of output 78 [2023-11-26 10:43:27,645 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 66 [2023-11-26 10:43:27,652 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 98 treesize of output 92 [2023-11-26 10:43:27,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:27,856 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 48 [2023-11-26 10:43:27,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:27,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 247 treesize of output 210 [2023-11-26 10:43:27,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:27,906 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 119 treesize of output 107 [2023-11-26 10:43:27,914 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 90 treesize of output 84 [2023-11-26 10:43:28,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:28,108 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-11-26 10:43:28,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:28,117 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2023-11-26 10:43:28,124 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 75 treesize of output 63 [2023-11-26 10:43:28,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:28,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 100 treesize of output 99 [2023-11-26 10:43:28,165 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 72 treesize of output 62 [2023-11-26 10:43:28,174 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 76 treesize of output 70 [2023-11-26 10:43:28,182 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 48 treesize of output 46 [2023-11-26 10:43:28,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:28,545 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 145 treesize of output 216 [2023-11-26 10:43:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:29,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334195406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:29,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:29,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 12] total 35 [2023-11-26 10:43:29,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085190475] [2023-11-26 10:43:29,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-26 10:43:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-26 10:43:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1144, Unknown=6, NotChecked=0, Total=1260 [2023-11-26 10:43:29,583 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:32,536 INFO L93 Difference]: Finished difference Result 294 states and 335 transitions. [2023-11-26 10:43:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 10:43:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 10:43:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:32,539 INFO L225 Difference]: With dead ends: 294 [2023-11-26 10:43:32,539 INFO L226 Difference]: Without dead ends: 294 [2023-11-26 10:43:32,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=410, Invalid=2554, Unknown=6, NotChecked=0, Total=2970 [2023-11-26 10:43:32,541 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 1152 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:32,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1362 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 10:43:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-26 10:43:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 183. [2023-11-26 10:43:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 181 states have internal predecessors, (199), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2023-11-26 10:43:32,548 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 40 [2023-11-26 10:43:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:32,548 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2023-11-26 10:43:32,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2023-11-26 10:43:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:43:32,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:32,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:32,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:32,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:32,750 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:32,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash 567998358, now seen corresponding path program 1 times [2023-11-26 10:43:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439556632] [2023-11-26 10:43:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:33,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:33,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439556632] [2023-11-26 10:43:33,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439556632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:33,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469019984] [2023-11-26 10:43:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:33,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:33,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:33,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:43:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:33,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 10:43:33,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:33,507 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 [2023-11-26 10:43:33,594 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:43:33,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:43:33,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:33,779 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:33,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:33,849 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:33,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 24 [2023-11-26 10:43:33,890 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:33,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:34,159 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 [2023-11-26 10:43:34,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-11-26 10:43:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:34,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:34,360 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1129 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1129) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) (forall ((v_ArrVal_1129 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~head~0#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1129) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2023-11-26 10:43:34,439 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1127 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1127))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))) (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1127 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1127))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))) is different from false [2023-11-26 10:43:34,451 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1127 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_1127))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1127 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_1127))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))))) is different from false [2023-11-26 10:43:34,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:34,465 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2023-11-26 10:43:34,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:34,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 144 treesize of output 131 [2023-11-26 10:43:34,483 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 80 treesize of output 76 [2023-11-26 10:43:34,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:34,496 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 76 treesize of output 74 [2023-11-26 10:43:34,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:34,932 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-11-26 10:43:34,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:34,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 141 treesize of output 128 [2023-11-26 10:43:34,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:34,964 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 76 treesize of output 75 [2023-11-26 10:43:34,971 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 66 treesize of output 62 [2023-11-26 10:43:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:35,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469019984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:35,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:35,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 26 [2023-11-26 10:43:35,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276203661] [2023-11-26 10:43:35,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:35,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:43:35,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:43:35,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=12, NotChecked=138, Total=702 [2023-11-26 10:43:35,150 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand has 27 states, 26 states have (on average 3.5) internal successors, (91), 27 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) [2023-11-26 10:43:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:35,826 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2023-11-26 10:43:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:43:35,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 27 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) Word has length 40 [2023-11-26 10:43:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:35,828 INFO L225 Difference]: With dead ends: 225 [2023-11-26 10:43:35,828 INFO L226 Difference]: Without dead ends: 225 [2023-11-26 10:43:35,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=12, NotChecked=150, Total=812 [2023-11-26 10:43:35,829 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 220 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:35,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 737 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 779 Invalid, 0 Unknown, 599 Unchecked, 0.5s Time] [2023-11-26 10:43:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-26 10:43:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 203. [2023-11-26 10:43:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 170 states have (on average 1.3529411764705883) internal successors, (230), 201 states have internal predecessors, (230), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2023-11-26 10:43:35,835 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 40 [2023-11-26 10:43:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:35,836 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2023-11-26 10:43:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 27 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) [2023-11-26 10:43:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2023-11-26 10:43:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:43:35,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:35,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:35,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 10:43:36,044 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:36,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 567998359, now seen corresponding path program 1 times [2023-11-26 10:43:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360344243] [2023-11-26 10:43:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:36,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360344243] [2023-11-26 10:43:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360344243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456799063] [2023-11-26 10:43:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:36,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:36,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:36,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:43:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:36,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 10:43:36,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:36,779 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 [2023-11-26 10:43:36,862 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:36,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:36,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-26 10:43:36,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:36,916 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 [2023-11-26 10:43:37,024 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:37,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:43:37,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:37,096 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 10:43:37,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-26 10:43:37,113 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:37,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 24 [2023-11-26 10:43:37,181 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:37,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:43:37,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:37,401 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 [2023-11-26 10:43:37,406 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 [2023-11-26 10:43:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:37,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:37,632 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1235 (Array Int Int)) (v_ArrVal_1234 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1235) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_1234 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2023-11-26 10:43:37,740 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1235 (Array Int Int)) (v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1231))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1230) .cse0 v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_1235) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1230) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1231) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2023-11-26 10:43:37,755 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_1235 (Array Int Int)) (v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_1231))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_1230) .cse1 v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_1235) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_1230) (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_1231) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2023-11-26 10:43:37,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:37,778 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-11-26 10:43:37,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:37,784 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-26 10:43:37,788 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 54 treesize of output 46 [2023-11-26 10:43:37,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:37,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 166 treesize of output 161 [2023-11-26 10:43:37,808 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 56 treesize of output 54 [2023-11-26 10:43:37,813 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 78 treesize of output 72 [2023-11-26 10:43:37,821 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 50 treesize of output 46 [2023-11-26 10:43:37,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:37,874 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2023-11-26 10:43:37,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:37,882 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2023-11-26 10:43:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:37,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2023-11-26 10:43:37,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:37,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-11-26 10:43:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456799063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:38,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:38,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 26 [2023-11-26 10:43:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819395780] [2023-11-26 10:43:38,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:38,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:43:38,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:43:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=471, Unknown=5, NotChecked=138, Total=702 [2023-11-26 10:43:38,060 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand has 27 states, 26 states have (on average 4.615384615384615) internal successors, (120), 27 states have internal predecessors, (120), 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) [2023-11-26 10:43:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:38,916 INFO L93 Difference]: Finished difference Result 222 states and 251 transitions. [2023-11-26 10:43:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:43:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.615384615384615) internal successors, (120), 27 states have internal predecessors, (120), 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 40 [2023-11-26 10:43:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:38,918 INFO L225 Difference]: With dead ends: 222 [2023-11-26 10:43:38,918 INFO L226 Difference]: Without dead ends: 222 [2023-11-26 10:43:38,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=790, Unknown=5, NotChecked=186, Total=1190 [2023-11-26 10:43:38,920 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 586 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:38,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 532 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 604 Invalid, 0 Unknown, 587 Unchecked, 0.5s Time] [2023-11-26 10:43:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-26 10:43:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 203. [2023-11-26 10:43:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 201 states have internal predecessors, (229), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 237 transitions. [2023-11-26 10:43:38,926 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 237 transitions. Word has length 40 [2023-11-26 10:43:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:38,927 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 237 transitions. [2023-11-26 10:43:38,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.615384615384615) internal successors, (120), 27 states have internal predecessors, (120), 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) [2023-11-26 10:43:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 237 transitions. [2023-11-26 10:43:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 10:43:38,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:38,928 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:38,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:39,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 10:43:39,135 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:39,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash 428078808, now seen corresponding path program 1 times [2023-11-26 10:43:39,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:39,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128043511] [2023-11-26 10:43:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:39,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:39,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128043511] [2023-11-26 10:43:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128043511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223031470] [2023-11-26 10:43:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:39,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:39,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:43:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:39,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:43:39,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:39,490 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 17 [2023-11-26 10:43:39,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-26 10:43:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:39,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:43:39,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223031470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:39,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:39,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-26 10:43:39,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107060224] [2023-11-26 10:43:39,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:39,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:43:39,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:43:39,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:43:39,581 INFO L87 Difference]: Start difference. First operand 203 states and 237 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-26 10:43:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:39,728 INFO L93 Difference]: Finished difference Result 237 states and 275 transitions. [2023-11-26 10:43:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:39,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 41 [2023-11-26 10:43:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:39,731 INFO L225 Difference]: With dead ends: 237 [2023-11-26 10:43:39,731 INFO L226 Difference]: Without dead ends: 230 [2023-11-26 10:43:39,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:43:39,732 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 143 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:39,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 308 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-26 10:43:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2023-11-26 10:43:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 192 states have (on average 1.34375) internal successors, (258), 223 states have internal predecessors, (258), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2023-11-26 10:43:39,738 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 41 [2023-11-26 10:43:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:39,738 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2023-11-26 10:43:39,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-26 10:43:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2023-11-26 10:43:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 10:43:39,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:39,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:39,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:39,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:39,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:39,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:39,947 INFO L85 PathProgramCache]: Analyzing trace with hash 428081773, now seen corresponding path program 1 times [2023-11-26 10:43:39,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:39,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873051921] [2023-11-26 10:43:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:39,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873051921] [2023-11-26 10:43:40,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873051921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:40,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272832736] [2023-11-26 10:43:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:40,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:40,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:43:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:40,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 10:43:40,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:40,546 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 [2023-11-26 10:43:40,624 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:40,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:40,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:40,667 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 [2023-11-26 10:43:40,762 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:40,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-26 10:43:40,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2023-11-26 10:43:40,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-26 10:43:40,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-26 10:43:40,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-26 10:43:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:40,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:41,033 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1431 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1431) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) is different from false [2023-11-26 10:43:41,041 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1428 (Array Int Int)) (v_ArrVal_1431 (Array Int Int)) (v_ArrVal_1429 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1428) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1429) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1431) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) is different from false [2023-11-26 10:43:41,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:41,088 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-11-26 10:43:41,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:41,095 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-11-26 10:43:41,099 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 50 treesize of output 42 [2023-11-26 10:43:41,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:41,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 100 treesize of output 99 [2023-11-26 10:43:41,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2023-11-26 10:43:41,122 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 76 treesize of output 70 [2023-11-26 10:43:41,127 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 48 treesize of output 46 [2023-11-26 10:43:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:41,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272832736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:41,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:41,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2023-11-26 10:43:41,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801111446] [2023-11-26 10:43:41,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:43:41,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:43:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=367, Unknown=12, NotChecked=82, Total=552 [2023-11-26 10:43:41,258 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand has 24 states, 23 states have (on average 3.869565217391304) internal successors, (89), 24 states have internal predecessors, (89), 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) [2023-11-26 10:43:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:41,962 INFO L93 Difference]: Finished difference Result 240 states and 277 transitions. [2023-11-26 10:43:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:43:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.869565217391304) internal successors, (89), 24 states have internal predecessors, (89), 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 41 [2023-11-26 10:43:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:41,964 INFO L225 Difference]: With dead ends: 240 [2023-11-26 10:43:41,964 INFO L226 Difference]: Without dead ends: 240 [2023-11-26 10:43:41,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=705, Unknown=13, NotChecked=118, Total=1056 [2023-11-26 10:43:41,966 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 741 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:41,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 755 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 634 Invalid, 0 Unknown, 386 Unchecked, 0.5s Time] [2023-11-26 10:43:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-26 10:43:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2023-11-26 10:43:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 193 states have (on average 1.3419689119170986) internal successors, (259), 224 states have internal predecessors, (259), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 267 transitions. [2023-11-26 10:43:41,972 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 267 transitions. Word has length 41 [2023-11-26 10:43:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:41,973 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 267 transitions. [2023-11-26 10:43:41,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.869565217391304) internal successors, (89), 24 states have internal predecessors, (89), 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) [2023-11-26 10:43:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 267 transitions. [2023-11-26 10:43:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 10:43:41,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:41,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:41,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 10:43:42,181 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:42,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 385633541, now seen corresponding path program 1 times [2023-11-26 10:43:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:42,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505793458] [2023-11-26 10:43:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:43,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:43,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505793458] [2023-11-26 10:43:43,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505793458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:43,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244202457] [2023-11-26 10:43:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:43,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:43,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:43:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:43,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 10:43:43,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:43,201 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 [2023-11-26 10:43:43,242 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:43,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:43,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:43,334 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:43,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:43,393 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:43,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 24 [2023-11-26 10:43:43,434 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:43,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:43,605 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 [2023-11-26 10:43:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:43,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:43,725 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1531 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1531) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-11-26 10:43:43,736 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1531 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1531) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-11-26 10:43:43,743 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1531 (Array Int Int)) (v_ArrVal_1529 (Array Int Int))) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1529))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1531)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-11-26 10:43:43,750 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1531 (Array Int Int)) (v_ArrVal_1529 (Array Int Int))) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1529))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1531)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-11-26 10:43:43,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:43,758 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2023-11-26 10:43:43,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:43,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 136 treesize of output 123 [2023-11-26 10:43:43,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:43,784 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 80 treesize of output 78 [2023-11-26 10:43:43,790 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 70 treesize of output 66 [2023-11-26 10:43:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:44,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244202457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:44,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:44,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 27 [2023-11-26 10:43:44,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697905668] [2023-11-26 10:43:44,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:44,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:43:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:43:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=490, Unknown=4, NotChecked=196, Total=812 [2023-11-26 10:43:44,041 INFO L87 Difference]: Start difference. First operand 226 states and 267 transitions. Second operand has 29 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 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) [2023-11-26 10:43:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:45,005 INFO L93 Difference]: Finished difference Result 241 states and 278 transitions. [2023-11-26 10:43:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:43:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 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 42 [2023-11-26 10:43:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:45,007 INFO L225 Difference]: With dead ends: 241 [2023-11-26 10:43:45,007 INFO L226 Difference]: Without dead ends: 241 [2023-11-26 10:43:45,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=1091, Unknown=4, NotChecked=300, Total=1722 [2023-11-26 10:43:45,009 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 687 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 804 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:45,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 734 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 747 Invalid, 0 Unknown, 804 Unchecked, 0.6s Time] [2023-11-26 10:43:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-26 10:43:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2023-11-26 10:43:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 194 states have (on average 1.3402061855670102) internal successors, (260), 225 states have internal predecessors, (260), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 268 transitions. [2023-11-26 10:43:45,015 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 268 transitions. Word has length 42 [2023-11-26 10:43:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:45,016 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 268 transitions. [2023-11-26 10:43:45,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 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) [2023-11-26 10:43:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 268 transitions. [2023-11-26 10:43:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 10:43:45,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:45,017 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:45,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:45,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 10:43:45,217 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:45,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash 182413883, now seen corresponding path program 1 times [2023-11-26 10:43:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:45,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561426123] [2023-11-26 10:43:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:43:45,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561426123] [2023-11-26 10:43:45,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561426123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:45,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:45,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:45,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344456253] [2023-11-26 10:43:45,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:45,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:45,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:45,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:45,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:45,290 INFO L87 Difference]: Start difference. First operand 227 states and 268 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:45,363 INFO L93 Difference]: Finished difference Result 293 states and 341 transitions. [2023-11-26 10:43:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-26 10:43:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:45,366 INFO L225 Difference]: With dead ends: 293 [2023-11-26 10:43:45,366 INFO L226 Difference]: Without dead ends: 293 [2023-11-26 10:43:45,366 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 [2023-11-26 10:43:45,367 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 56 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:45,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 243 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-26 10:43:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 246. [2023-11-26 10:43:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 213 states have (on average 1.3145539906103287) internal successors, (280), 244 states have internal predecessors, (280), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 288 transitions. [2023-11-26 10:43:45,378 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 288 transitions. Word has length 43 [2023-11-26 10:43:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:45,378 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 288 transitions. [2023-11-26 10:43:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 288 transitions. [2023-11-26 10:43:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 10:43:45,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:45,379 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:45,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-26 10:43:45,380 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:45,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -930261649, now seen corresponding path program 1 times [2023-11-26 10:43:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:45,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897029892] [2023-11-26 10:43:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:43:45,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:45,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897029892] [2023-11-26 10:43:45,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897029892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:45,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:45,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:43:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867393892] [2023-11-26 10:43:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:45,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:43:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:43:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:43:45,458 INFO L87 Difference]: Start difference. First operand 246 states and 288 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-26 10:43:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:45,589 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2023-11-26 10:43:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:45,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 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 43 [2023-11-26 10:43:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:45,591 INFO L225 Difference]: With dead ends: 250 [2023-11-26 10:43:45,591 INFO L226 Difference]: Without dead ends: 250 [2023-11-26 10:43:45,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:45,592 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 147 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:45,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 139 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:43:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-26 10:43:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2023-11-26 10:43:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 208 states have (on average 1.3173076923076923) internal successors, (274), 238 states have internal predecessors, (274), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 282 transitions. [2023-11-26 10:43:45,599 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 282 transitions. Word has length 43 [2023-11-26 10:43:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:45,599 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 282 transitions. [2023-11-26 10:43:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-26 10:43:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 282 transitions. [2023-11-26 10:43:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:43:45,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:45,600 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:45,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-26 10:43:45,601 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-26 10:43:45,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -864164995, now seen corresponding path program 1 times [2023-11-26 10:43:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:45,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419639275] [2023-11-26 10:43:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419639275] [2023-11-26 10:43:46,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419639275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711716701] [2023-11-26 10:43:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:46,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:46,641 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:46,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1451c576-36be-4cc7-9327-a7872d84a363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:43:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:46,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 10:43:46,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:46,856 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 [2023-11-26 10:43:46,952 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:46,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:46,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:47,108 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:47,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-26 10:43:47,183 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:47,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 23 [2023-11-26 10:43:47,271 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:43:47,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 23 [2023-11-26 10:43:47,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:43:47,382 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-26 10:43:47,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-26 10:43:47,459 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-11-26 10:43:47,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19