./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX --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 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:12:16,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:12:16,792 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:12:16,800 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:12:16,801 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:12:16,839 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:12:16,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:12:16,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:12:16,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:12:16,843 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:12:16,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:12:16,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:12:16,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:12:16,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:12:16,846 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:12:16,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:12:16,848 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:12:16,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:12:16,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:12:16,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:12:16,851 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:12:16,852 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:12:16,853 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:12:16,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:12:16,854 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:12:16,855 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:12:16,855 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:12:16,856 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:12:16,857 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:12:16,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:12:16,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:12:16,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:12:16,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:12:16,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:12:16,861 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:12:16,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:12:16,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:12:16,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:12:16,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:12:16,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:12:16,866 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:12:16,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:12:16,870 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_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2024-11-08 18:12:17,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:12:17,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:12:17,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:12:17,459 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:12:17,459 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:12:17,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i Unable to find full path for "g++" [2024-11-08 18:12:20,649 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:12:21,093 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:12:21,094 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-11-08 18:12:21,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/data/b5918847c/ed37753817a14b138d594de730fed471/FLAGc00940e6b [2024-11-08 18:12:21,153 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/data/b5918847c/ed37753817a14b138d594de730fed471 [2024-11-08 18:12:21,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:12:21,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:12:21,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:12:21,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:12:21,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:12:21,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:12:21" (1/1) ... [2024-11-08 18:12:21,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdc6f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:21, skipping insertion in model container [2024-11-08 18:12:21,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:12:21" (1/1) ... [2024-11-08 18:12:21,259 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:12:21,964 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:12:21,979 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:12:21,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:12:22,004 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:12:22,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:12:22,128 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:12:22,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22 WrapperNode [2024-11-08 18:12:22,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:12:22,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:12:22,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:12:22,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:12:22,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,233 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-11-08 18:12:22,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:12:22,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:12:22,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:12:22,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:12:22,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,266 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,314 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-11-08 18:12:22,318 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,318 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:12:22,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:12:22,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:12:22,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:12:22,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (1/1) ... [2024-11-08 18:12:22,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:12:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:22,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:12:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:12:22,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:12:22,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:12:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 18:12:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 18:12:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:12:22,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:12:22,659 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:12:22,663 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:12:22,915 INFO L? ?]: Removed 37 outVars from TransFormulas that were not future-live. [2024-11-08 18:12:22,916 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:12:22,944 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:12:22,945 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 18:12:22,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:12:22 BoogieIcfgContainer [2024-11-08 18:12:22,946 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:12:22,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:12:22,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:12:22,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:12:22,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:12:21" (1/3) ... [2024-11-08 18:12:22,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb7d3c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:12:22, skipping insertion in model container [2024-11-08 18:12:22,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:12:22" (2/3) ... [2024-11-08 18:12:22,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb7d3c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:12:22, skipping insertion in model container [2024-11-08 18:12:22,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:12:22" (3/3) ... [2024-11-08 18:12:22,959 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2024-11-08 18:12:22,982 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:12:22,983 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-11-08 18:12:23,070 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:12:23,079 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@2ea1a5db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:12:23,080 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-08 18:12:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 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) [2024-11-08 18:12:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 18:12:23,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:23,101 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:23,102 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:23,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash 121323279, now seen corresponding path program 1 times [2024-11-08 18:12:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:23,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069001687] [2024-11-08 18:12:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:23,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:23,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069001687] [2024-11-08 18:12:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069001687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:23,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:23,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:12:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614412323] [2024-11-08 18:12:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:23,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:12:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:12:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:12:23,934 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:24,047 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-11-08 18:12:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:12:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 18:12:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:24,071 INFO L225 Difference]: With dead ends: 25 [2024-11-08 18:12:24,072 INFO L226 Difference]: Without dead ends: 23 [2024-11-08 18:12:24,078 INFO L431 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 [2024-11-08 18:12:24,088 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:24,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-08 18:12:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-08 18:12:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 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) [2024-11-08 18:12:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-11-08 18:12:24,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 8 [2024-11-08 18:12:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:24,155 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-11-08 18:12:24,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-11-08 18:12:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 18:12:24,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:24,158 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:24,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:12:24,159 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:24,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash 121323280, now seen corresponding path program 1 times [2024-11-08 18:12:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299168571] [2024-11-08 18:12:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:24,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:24,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299168571] [2024-11-08 18:12:24,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299168571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:24,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:24,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:12:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996597590] [2024-11-08 18:12:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:24,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:12:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:12:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:12:24,964 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:25,254 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-11-08 18:12:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:12:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 18:12:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:25,257 INFO L225 Difference]: With dead ends: 34 [2024-11-08 18:12:25,258 INFO L226 Difference]: Without dead ends: 34 [2024-11-08 18:12:25,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:12:25,260 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:25,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 18:12:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-08 18:12:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-11-08 18:12:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 26 states have internal predecessors, (33), 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) [2024-11-08 18:12:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-08 18:12:25,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 8 [2024-11-08 18:12:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:25,271 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-08 18:12:25,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-08 18:12:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 18:12:25,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:25,274 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:25,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:12:25,275 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:25,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash 123170322, now seen corresponding path program 1 times [2024-11-08 18:12:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976624436] [2024-11-08 18:12:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976624436] [2024-11-08 18:12:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976624436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:25,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:25,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:12:25,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929484326] [2024-11-08 18:12:25,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:25,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:12:25,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:25,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:12:25,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:12:25,611 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:25,737 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-11-08 18:12:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:12:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 18:12:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:25,742 INFO L225 Difference]: With dead ends: 31 [2024-11-08 18:12:25,742 INFO L226 Difference]: Without dead ends: 31 [2024-11-08 18:12:25,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:12:25,746 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:25,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-08 18:12:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2024-11-08 18:12:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 25 states have internal predecessors, (32), 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) [2024-11-08 18:12:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-08 18:12:25,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 8 [2024-11-08 18:12:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:25,761 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-08 18:12:25,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-08 18:12:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 18:12:25,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:25,764 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:25,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:12:25,766 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:25,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1784024264, now seen corresponding path program 1 times [2024-11-08 18:12:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:25,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986301287] [2024-11-08 18:12:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:25,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:25,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986301287] [2024-11-08 18:12:25,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986301287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:25,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706098204] [2024-11-08 18:12:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:25,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:25,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:25,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:25,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:12:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:25,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 18:12:25,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:26,125 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:12:26,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706098204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:26,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:12:26,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-08 18:12:26,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139739668] [2024-11-08 18:12:26,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:26,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:12:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:26,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:12:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:12:26,133 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-08 18:12:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:26,207 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-11-08 18:12:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:12:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-11-08 18:12:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:26,208 INFO L225 Difference]: With dead ends: 33 [2024-11-08 18:12:26,209 INFO L226 Difference]: Without dead ends: 33 [2024-11-08 18:12:26,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:12:26,210 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:26,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-08 18:12:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-08 18:12:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 31 states have internal predecessors, (38), 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) [2024-11-08 18:12:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-08 18:12:26,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 12 [2024-11-08 18:12:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:26,217 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-08 18:12:26,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-08 18:12:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-08 18:12:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 18:12:26,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:26,218 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:26,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:12:26,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:26,423 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:26,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1830884662, now seen corresponding path program 1 times [2024-11-08 18:12:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128449712] [2024-11-08 18:12:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:26,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:27,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128449712] [2024-11-08 18:12:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128449712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:27,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162254149] [2024-11-08 18:12:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:27,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:27,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:27,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:12:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:27,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 18:12:27,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:27,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-08 18:12:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:27,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162254149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:27,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-08 18:12:27,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981230647] [2024-11-08 18:12:27,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:27,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 18:12:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 18:12:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-08 18:12:27,970 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2024-11-08 18:12:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:28,240 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-08 18:12:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:12:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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 12 [2024-11-08 18:12:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:28,243 INFO L225 Difference]: With dead ends: 32 [2024-11-08 18:12:28,243 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 18:12:28,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-11-08 18:12:28,246 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:28,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 108 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 18:12:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-08 18:12:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 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) [2024-11-08 18:12:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-08 18:12:28,257 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 12 [2024-11-08 18:12:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:28,262 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-08 18:12:28,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2024-11-08 18:12:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-08 18:12:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 18:12:28,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:28,263 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:28,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 18:12:28,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:28,465 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:28,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash 765772597, now seen corresponding path program 1 times [2024-11-08 18:12:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:28,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149570480] [2024-11-08 18:12:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:28,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149570480] [2024-11-08 18:12:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149570480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:28,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:28,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:12:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434921055] [2024-11-08 18:12:28,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:28,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:12:28,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:28,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:12:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:12:28,614 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-08 18:12:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:28,708 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-08 18:12:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:12:28,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2024-11-08 18:12:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:28,709 INFO L225 Difference]: With dead ends: 30 [2024-11-08 18:12:28,709 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 18:12:28,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:12:28,711 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:28,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 18:12:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-08 18:12:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2024-11-08 18:12:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-08 18:12:28,715 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2024-11-08 18:12:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:28,715 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-08 18:12:28,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-08 18:12:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-08 18:12:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 18:12:28,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:28,716 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:28,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 18:12:28,717 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:28,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash 765772598, now seen corresponding path program 1 times [2024-11-08 18:12:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:28,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240031717] [2024-11-08 18:12:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:28,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240031717] [2024-11-08 18:12:28,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240031717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886617470] [2024-11-08 18:12:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:28,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:28,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:12:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:29,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 18:12:29,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:29,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:29,403 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 20 treesize of output 16 [2024-11-08 18:12:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:29,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886617470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:29,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:29,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2024-11-08 18:12:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230452506] [2024-11-08 18:12:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:29,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:12:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:12:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:12:29,437 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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) [2024-11-08 18:12:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:29,605 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-08 18:12:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:12:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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 14 [2024-11-08 18:12:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:29,607 INFO L225 Difference]: With dead ends: 35 [2024-11-08 18:12:29,607 INFO L226 Difference]: Without dead ends: 35 [2024-11-08 18:12:29,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:12:29,609 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:29,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-08 18:12:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2024-11-08 18:12:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 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) [2024-11-08 18:12:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-08 18:12:29,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2024-11-08 18:12:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:29,620 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-08 18:12:29,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 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) [2024-11-08 18:12:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-08 18:12:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 18:12:29,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:29,621 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:29,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 18:12:29,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 18:12:29,822 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:29,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:29,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2030147180, now seen corresponding path program 1 times [2024-11-08 18:12:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:29,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659711392] [2024-11-08 18:12:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:12:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:29,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659711392] [2024-11-08 18:12:29,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659711392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:29,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:29,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:12:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804637288] [2024-11-08 18:12:29,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:29,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:12:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:12:29,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:12:29,910 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:29,959 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-08 18:12:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:12:29,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 18:12:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:29,960 INFO L225 Difference]: With dead ends: 36 [2024-11-08 18:12:29,961 INFO L226 Difference]: Without dead ends: 36 [2024-11-08 18:12:29,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:12:29,962 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:29,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 18:12:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-08 18:12:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-11-08 18:12:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-08 18:12:29,966 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2024-11-08 18:12:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:29,967 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-08 18:12:29,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-08 18:12:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 18:12:29,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:29,968 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:29,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:12:29,969 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:29,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1771981742, now seen corresponding path program 1 times [2024-11-08 18:12:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078812550] [2024-11-08 18:12:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:12:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078812550] [2024-11-08 18:12:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078812550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:30,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:12:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868551530] [2024-11-08 18:12:30,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:30,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:12:30,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:12:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:12:30,075 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:30,110 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-11-08 18:12:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:12:30,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 18:12:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:30,111 INFO L225 Difference]: With dead ends: 34 [2024-11-08 18:12:30,111 INFO L226 Difference]: Without dead ends: 34 [2024-11-08 18:12:30,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:12:30,113 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:30,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 18:12:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-08 18:12:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-08 18:12:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 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) [2024-11-08 18:12:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-08 18:12:30,117 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2024-11-08 18:12:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:30,117 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-08 18:12:30,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-08 18:12:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 18:12:30,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:30,119 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:30,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 18:12:30,119 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:30,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1734823685, now seen corresponding path program 1 times [2024-11-08 18:12:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:30,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964797446] [2024-11-08 18:12:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:30,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:12:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:30,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964797446] [2024-11-08 18:12:30,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964797446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:30,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:30,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:12:30,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938091268] [2024-11-08 18:12:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:30,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:12:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:12:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:12:30,225 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:30,242 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-08 18:12:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:12:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 18:12:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:30,244 INFO L225 Difference]: With dead ends: 29 [2024-11-08 18:12:30,244 INFO L226 Difference]: Without dead ends: 25 [2024-11-08 18:12:30,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:12:30,245 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:30,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 18:12:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-08 18:12:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-08 18:12:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2024-11-08 18:12:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-08 18:12:30,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2024-11-08 18:12:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:30,249 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-08 18:12:30,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-08 18:12:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 18:12:30,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:30,250 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:30,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 18:12:30,251 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:30,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2055089852, now seen corresponding path program 1 times [2024-11-08 18:12:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:30,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788622559] [2024-11-08 18:12:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:30,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:12:30,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:30,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788622559] [2024-11-08 18:12:30,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788622559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:12:30,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:12:30,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:12:30,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033869664] [2024-11-08 18:12:30,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:12:30,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:12:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:30,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:12:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:12:30,407 INFO L87 Difference]: Start difference. First operand 25 states and 28 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) [2024-11-08 18:12:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:30,449 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-11-08 18:12:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:12:30,450 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 [2024-11-08 18:12:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:30,451 INFO L225 Difference]: With dead ends: 31 [2024-11-08 18:12:30,451 INFO L226 Difference]: Without dead ends: 19 [2024-11-08 18:12:30,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:12:30,452 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:30,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 18:12:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-08 18:12:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-08 18:12:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2024-11-08 18:12:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-08 18:12:30,455 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 18 [2024-11-08 18:12:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:30,455 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-08 18:12:30,455 INFO L472 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) [2024-11-08 18:12:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-08 18:12:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 18:12:30,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:30,456 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:30,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 18:12:30,457 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:30,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash 775226174, now seen corresponding path program 1 times [2024-11-08 18:12:30,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:30,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077938246] [2024-11-08 18:12:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:30,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077938246] [2024-11-08 18:12:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077938246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6591093] [2024-11-08 18:12:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:30,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:30,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:30,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:30,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:12:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:30,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 18:12:30,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:30,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:31,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6591093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:31,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:31,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-08 18:12:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339643075] [2024-11-08 18:12:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:31,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 18:12:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 18:12:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:12:31,097 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 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) [2024-11-08 18:12:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:31,273 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-08 18:12:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:12:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 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 [2024-11-08 18:12:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:31,275 INFO L225 Difference]: With dead ends: 32 [2024-11-08 18:12:31,275 INFO L226 Difference]: Without dead ends: 26 [2024-11-08 18:12:31,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-08 18:12:31,277 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:31,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 18:12:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-08 18:12:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-11-08 18:12:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2024-11-08 18:12:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-08 18:12:31,281 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2024-11-08 18:12:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:31,281 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-08 18:12:31,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 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) [2024-11-08 18:12:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-08 18:12:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 18:12:31,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:31,283 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:31,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 18:12:31,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:31,484 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:31,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash 133298678, now seen corresponding path program 2 times [2024-11-08 18:12:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:31,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936716445] [2024-11-08 18:12:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936716445] [2024-11-08 18:12:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936716445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:32,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104524387] [2024-11-08 18:12:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:12:32,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:32,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:32,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:32,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:12:32,242 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:12:32,242 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:32,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 18:12:32,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:32,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:32,811 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 22 treesize of output 18 [2024-11-08 18:12:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104524387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:32,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:32,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-08 18:12:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863909675] [2024-11-08 18:12:32,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:32,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 18:12:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 18:12:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-08 18:12:32,955 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:33,337 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-11-08 18:12:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 18:12:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 18:12:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:33,338 INFO L225 Difference]: With dead ends: 29 [2024-11-08 18:12:33,338 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 18:12:33,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-11-08 18:12:33,340 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:33,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 18:12:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 18:12:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-08 18:12:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2024-11-08 18:12:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-08 18:12:33,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2024-11-08 18:12:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:33,351 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-08 18:12:33,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-08 18:12:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 18:12:33,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:33,352 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:33,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:12:33,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:33,554 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:33,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1775371644, now seen corresponding path program 3 times [2024-11-08 18:12:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:33,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208896253] [2024-11-08 18:12:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208896253] [2024-11-08 18:12:33,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208896253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:33,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609478230] [2024-11-08 18:12:33,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:12:33,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:33,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:12:34,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 18:12:34,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:34,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-08 18:12:34,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:35,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:36,221 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 22 treesize of output 18 [2024-11-08 18:12:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609478230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:36,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:36,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2024-11-08 18:12:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129469818] [2024-11-08 18:12:36,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:36,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 18:12:36,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 18:12:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 18:12:36,667 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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) [2024-11-08 18:12:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:38,473 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2024-11-08 18:12:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 18:12:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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 26 [2024-11-08 18:12:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:38,474 INFO L225 Difference]: With dead ends: 48 [2024-11-08 18:12:38,475 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 18:12:38,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=362, Invalid=3178, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 18:12:38,478 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:38,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 137 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 18:12:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 18:12:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-08 18:12:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-11-08 18:12:38,482 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 26 [2024-11-08 18:12:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:38,482 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-11-08 18:12:38,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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) [2024-11-08 18:12:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-11-08 18:12:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 18:12:38,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:38,484 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:38,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:12:38,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 18:12:38,685 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:38,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash -197295942, now seen corresponding path program 4 times [2024-11-08 18:12:38,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:38,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736644680] [2024-11-08 18:12:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:38,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736644680] [2024-11-08 18:12:39,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736644680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318693127] [2024-11-08 18:12:39,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:12:39,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:39,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:39,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:39,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:12:39,216 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:12:39,216 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:39,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 18:12:39,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:39,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:39,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318693127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:39,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-08 18:12:39,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512074140] [2024-11-08 18:12:39,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:39,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 18:12:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 18:12:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-11-08 18:12:39,834 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 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) [2024-11-08 18:12:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:40,268 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2024-11-08 18:12:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 18:12:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 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 34 [2024-11-08 18:12:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:40,272 INFO L225 Difference]: With dead ends: 56 [2024-11-08 18:12:40,272 INFO L226 Difference]: Without dead ends: 42 [2024-11-08 18:12:40,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-08 18:12:40,276 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:40,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 196 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 18:12:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-08 18:12:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-11-08 18:12:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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) [2024-11-08 18:12:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-11-08 18:12:40,286 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2024-11-08 18:12:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:40,287 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-11-08 18:12:40,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 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) [2024-11-08 18:12:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-11-08 18:12:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 18:12:40,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:40,288 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:40,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:12:40,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:40,496 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:40,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:40,499 INFO L85 PathProgramCache]: Analyzing trace with hash 191235954, now seen corresponding path program 5 times [2024-11-08 18:12:40,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:40,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481685285] [2024-11-08 18:12:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:40,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:41,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:41,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481685285] [2024-11-08 18:12:41,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481685285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188477402] [2024-11-08 18:12:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:12:41,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:41,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:12:41,693 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-08 18:12:41,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:41,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 18:12:41,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:41,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:12:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:42,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188477402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:43,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:43,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-11-08 18:12:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419003901] [2024-11-08 18:12:43,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:43,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 18:12:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 18:12:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2024-11-08 18:12:43,109 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 32 states, 31 states have (on average 3.032258064516129) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:43,811 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-11-08 18:12:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 18:12:43,812 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.032258064516129) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-08 18:12:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:43,813 INFO L225 Difference]: With dead ends: 45 [2024-11-08 18:12:43,814 INFO L226 Difference]: Without dead ends: 45 [2024-11-08 18:12:43,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 18:12:43,817 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:43,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 171 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 18:12:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-08 18:12:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-11-08 18:12:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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) [2024-11-08 18:12:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-08 18:12:43,823 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2024-11-08 18:12:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:43,824 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-08 18:12:43,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.032258064516129) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-08 18:12:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 18:12:43,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:43,826 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:43,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:12:44,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 18:12:44,028 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:44,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1363866872, now seen corresponding path program 6 times [2024-11-08 18:12:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:44,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485917036] [2024-11-08 18:12:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485917036] [2024-11-08 18:12:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485917036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:44,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077734612] [2024-11-08 18:12:44,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:12:44,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:44,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:12:44,867 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 18:12:44,867 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:44,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 18:12:44,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:45,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:45,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077734612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:45,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:45,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-11-08 18:12:45,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301355417] [2024-11-08 18:12:45,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:45,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 18:12:45,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 18:12:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-08 18:12:45,715 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 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) [2024-11-08 18:12:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:46,379 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2024-11-08 18:12:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 18:12:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 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 [2024-11-08 18:12:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:46,381 INFO L225 Difference]: With dead ends: 68 [2024-11-08 18:12:46,381 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 18:12:46,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2024-11-08 18:12:46,383 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:46,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 303 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 18:12:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 18:12:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2024-11-08 18:12:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-11-08 18:12:46,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2024-11-08 18:12:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:46,400 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-11-08 18:12:46,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 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) [2024-11-08 18:12:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-11-08 18:12:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 18:12:46,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:46,404 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:46,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 18:12:46,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 18:12:46,605 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:46,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash 599606192, now seen corresponding path program 7 times [2024-11-08 18:12:46,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:46,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591174526] [2024-11-08 18:12:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:48,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591174526] [2024-11-08 18:12:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591174526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:48,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76289166] [2024-11-08 18:12:48,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:12:48,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:48,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:48,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:48,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:12:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:48,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-08 18:12:48,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:48,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:49,198 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 7 treesize of output 5 [2024-11-08 18:12:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:49,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76289166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:49,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:49,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2024-11-08 18:12:49,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182753934] [2024-11-08 18:12:49,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:49,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 18:12:49,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 18:12:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 18:12:49,359 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:50,117 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-11-08 18:12:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 18:12:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 18:12:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:50,119 INFO L225 Difference]: With dead ends: 53 [2024-11-08 18:12:50,119 INFO L226 Difference]: Without dead ends: 53 [2024-11-08 18:12:50,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 18:12:50,121 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:50,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 18:12:50,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-08 18:12:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-11-08 18:12:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-11-08 18:12:50,125 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2024-11-08 18:12:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:50,125 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-11-08 18:12:50,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:12:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-11-08 18:12:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 18:12:50,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:50,128 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:50,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:12:50,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:12:50,329 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:50,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1223826890, now seen corresponding path program 8 times [2024-11-08 18:12:50,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729811588] [2024-11-08 18:12:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:50,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:50,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729811588] [2024-11-08 18:12:50,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729811588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:50,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973214646] [2024-11-08 18:12:50,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:12:50,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:50,980 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:50,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:12:51,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:12:51,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:51,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 18:12:51,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:51,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:12:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973214646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:12:52,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:12:52,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2024-11-08 18:12:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887913527] [2024-11-08 18:12:52,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:12:52,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 18:12:52,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:12:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 18:12:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 18:12:52,094 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2024-11-08 18:12:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:12:52,658 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2024-11-08 18:12:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 18:12:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 50 [2024-11-08 18:12:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:12:52,660 INFO L225 Difference]: With dead ends: 80 [2024-11-08 18:12:52,660 INFO L226 Difference]: Without dead ends: 58 [2024-11-08 18:12:52,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 18:12:52,662 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 18:12:52,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 262 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 18:12:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-08 18:12:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2024-11-08 18:12:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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) [2024-11-08 18:12:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-11-08 18:12:52,667 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2024-11-08 18:12:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:12:52,667 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-11-08 18:12:52,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2024-11-08 18:12:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-11-08 18:12:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 18:12:52,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:12:52,669 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:12:52,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 18:12:52,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:52,874 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:12:52,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:12:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1652685038, now seen corresponding path program 9 times [2024-11-08 18:12:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:12:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242169054] [2024-11-08 18:12:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:12:52,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:12:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:12:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 36 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:12:54,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:12:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242169054] [2024-11-08 18:12:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242169054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:12:54,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714333032] [2024-11-08 18:12:54,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:12:54,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:12:54,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:12:54,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:12:54,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:12:54,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-08 18:12:54,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:12:54,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-08 18:12:54,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:12:54,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:12:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:12:57,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:13:00,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714333032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:00,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:00,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 25] total 66 [2024-11-08 18:13:00,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708945511] [2024-11-08 18:13:00,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:00,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-08 18:13:00,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-08 18:13:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=3960, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 18:13:00,845 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 67 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 67 states have internal predecessors, (143), 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) [2024-11-08 18:13:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:07,943 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-11-08 18:13:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-08 18:13:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 67 states have internal predecessors, (143), 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 54 [2024-11-08 18:13:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:07,945 INFO L225 Difference]: With dead ends: 81 [2024-11-08 18:13:07,945 INFO L226 Difference]: Without dead ends: 81 [2024-11-08 18:13:07,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1563, Invalid=12009, Unknown=0, NotChecked=0, Total=13572 [2024-11-08 18:13:07,949 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:07,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 240 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 18:13:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-08 18:13:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-11-08 18:13:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:13:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2024-11-08 18:13:07,956 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 54 [2024-11-08 18:13:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:07,957 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2024-11-08 18:13:07,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 67 states have internal predecessors, (143), 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) [2024-11-08 18:13:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2024-11-08 18:13:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-08 18:13:07,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:07,960 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:07,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 18:13:08,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:08,161 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:08,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash -186984174, now seen corresponding path program 10 times [2024-11-08 18:13:08,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:08,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366724326] [2024-11-08 18:13:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:08,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 132 proven. 126 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-08 18:13:09,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366724326] [2024-11-08 18:13:09,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366724326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:09,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206692006] [2024-11-08 18:13:09,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:13:09,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:09,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:09,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:09,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:13:09,386 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:13:09,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:13:09,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 18:13:09,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 132 proven. 126 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-08 18:13:09,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 132 proven. 126 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-08 18:13:10,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206692006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:10,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2024-11-08 18:13:10,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548897907] [2024-11-08 18:13:10,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:10,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:13:10,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:13:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 18:13:10,538 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 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) [2024-11-08 18:13:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:11,372 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2024-11-08 18:13:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 18:13:11,373 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 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 78 [2024-11-08 18:13:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:11,374 INFO L225 Difference]: With dead ends: 112 [2024-11-08 18:13:11,374 INFO L226 Difference]: Without dead ends: 86 [2024-11-08 18:13:11,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 18:13:11,376 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:11,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 563 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 18:13:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-08 18:13:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-11-08 18:13:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 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) [2024-11-08 18:13:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-11-08 18:13:11,382 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2024-11-08 18:13:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:11,382 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-11-08 18:13:11,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 37 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) [2024-11-08 18:13:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-11-08 18:13:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-08 18:13:11,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:11,384 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:11,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 18:13:11,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:11,585 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:11,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 962472906, now seen corresponding path program 11 times [2024-11-08 18:13:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885182104] [2024-11-08 18:13:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:11,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 126 proven. 175 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 18:13:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885182104] [2024-11-08 18:13:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885182104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23375209] [2024-11-08 18:13:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:13:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:12,580 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:12,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:13:12,846 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-08 18:13:12,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:13:12,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-08 18:13:12,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:12,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-08 18:13:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 42 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:14,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23375209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:18,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:18,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 26] total 68 [2024-11-08 18:13:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572507876] [2024-11-08 18:13:18,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:18,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-08 18:13:18,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:18,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-08 18:13:18,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4185, Unknown=0, NotChecked=0, Total=4556 [2024-11-08 18:13:18,039 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 68 states, 68 states have (on average 3.25) internal successors, (221), 68 states have internal predecessors, (221), 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) [2024-11-08 18:13:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:21,871 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2024-11-08 18:13:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 18:13:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.25) internal successors, (221), 68 states have internal predecessors, (221), 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 82 [2024-11-08 18:13:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:21,877 INFO L225 Difference]: With dead ends: 193 [2024-11-08 18:13:21,877 INFO L226 Difference]: Without dead ends: 163 [2024-11-08 18:13:21,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=952, Invalid=9968, Unknown=0, NotChecked=0, Total=10920 [2024-11-08 18:13:21,884 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:21,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 601 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 18:13:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-08 18:13:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 121. [2024-11-08 18:13:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 120 states have internal predecessors, (130), 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) [2024-11-08 18:13:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2024-11-08 18:13:21,900 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 82 [2024-11-08 18:13:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:21,900 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2024-11-08 18:13:21,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.25) internal successors, (221), 68 states have internal predecessors, (221), 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) [2024-11-08 18:13:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2024-11-08 18:13:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-08 18:13:21,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:21,907 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:21,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 18:13:22,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:22,108 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:22,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1370114056, now seen corresponding path program 12 times [2024-11-08 18:13:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:22,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082074295] [2024-11-08 18:13:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:22,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 144 proven. 232 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 18:13:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082074295] [2024-11-08 18:13:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082074295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:23,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177110820] [2024-11-08 18:13:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:13:23,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:23,191 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 18:13:23,731 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-08 18:13:23,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:13:23,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-08 18:13:23,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:23,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-08 18:13:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 46 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:25,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:29,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177110820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:29,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:29,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 28] total 74 [2024-11-08 18:13:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627978128] [2024-11-08 18:13:29,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:29,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-08 18:13:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-08 18:13:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=4976, Unknown=0, NotChecked=0, Total=5402 [2024-11-08 18:13:29,030 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 74 states, 74 states have (on average 3.310810810810811) internal successors, (245), 74 states have internal predecessors, (245), 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) [2024-11-08 18:13:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:33,846 INFO L93 Difference]: Finished difference Result 263 states and 274 transitions. [2024-11-08 18:13:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-08 18:13:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.310810810810811) internal successors, (245), 74 states have internal predecessors, (245), 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 90 [2024-11-08 18:13:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:33,848 INFO L225 Difference]: With dead ends: 263 [2024-11-08 18:13:33,848 INFO L226 Difference]: Without dead ends: 229 [2024-11-08 18:13:33,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1129, Invalid=12211, Unknown=0, NotChecked=0, Total=13340 [2024-11-08 18:13:33,852 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:33,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 669 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3081 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-08 18:13:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-08 18:13:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 183. [2024-11-08 18:13:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.065934065934066) internal successors, (194), 182 states have internal predecessors, (194), 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) [2024-11-08 18:13:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 194 transitions. [2024-11-08 18:13:33,859 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 194 transitions. Word has length 90 [2024-11-08 18:13:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:33,860 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 194 transitions. [2024-11-08 18:13:33,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.310810810810811) internal successors, (245), 74 states have internal predecessors, (245), 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) [2024-11-08 18:13:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 194 transitions. [2024-11-08 18:13:33,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-08 18:13:33,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:33,863 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:33,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 18:13:34,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:34,065 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:34,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash -532259158, now seen corresponding path program 13 times [2024-11-08 18:13:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539945957] [2024-11-08 18:13:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 22 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:35,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:35,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539945957] [2024-11-08 18:13:35,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539945957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:35,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266586894] [2024-11-08 18:13:35,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:13:35,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:35,398 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:35,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 18:13:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:35,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-08 18:13:35,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 22 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:36,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 22 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:38,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266586894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:38,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-11-08 18:13:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618926957] [2024-11-08 18:13:38,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:38,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-08 18:13:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-08 18:13:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 18:13:38,149 INFO L87 Difference]: Start difference. First operand 183 states and 194 transitions. Second operand has 56 states, 56 states have (on average 3.5) internal successors, (196), 56 states have internal predecessors, (196), 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) [2024-11-08 18:13:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:40,420 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2024-11-08 18:13:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 18:13:40,421 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.5) internal successors, (196), 56 states have internal predecessors, (196), 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 98 [2024-11-08 18:13:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:40,423 INFO L225 Difference]: With dead ends: 229 [2024-11-08 18:13:40,423 INFO L226 Difference]: Without dead ends: 183 [2024-11-08 18:13:40,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=200, Invalid=4090, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 18:13:40,425 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 28 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:40,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1487 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 18:13:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-08 18:13:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-08 18:13:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0604395604395604) internal successors, (193), 182 states have internal predecessors, (193), 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) [2024-11-08 18:13:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 193 transitions. [2024-11-08 18:13:40,435 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 193 transitions. Word has length 98 [2024-11-08 18:13:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:40,438 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 193 transitions. [2024-11-08 18:13:40,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.5) internal successors, (196), 56 states have internal predecessors, (196), 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) [2024-11-08 18:13:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 193 transitions. [2024-11-08 18:13:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-08 18:13:40,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:40,441 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:40,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-08 18:13:40,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-08 18:13:40,645 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:40,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1519919802, now seen corresponding path program 14 times [2024-11-08 18:13:40,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:40,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568866073] [2024-11-08 18:13:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 162 proven. 297 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 18:13:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568866073] [2024-11-08 18:13:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568866073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302033526] [2024-11-08 18:13:41,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:13:41,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:41,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:41,911 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:41,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 18:13:42,294 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:13:42,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:13:42,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 18:13:42,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 162 proven. 297 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 18:13:42,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 162 proven. 297 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 18:13:44,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302033526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:44,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:44,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2024-11-08 18:13:44,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504800213] [2024-11-08 18:13:44,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:44,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-08 18:13:44,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:44,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-08 18:13:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 18:13:44,311 INFO L87 Difference]: Start difference. First operand 183 states and 193 transitions. Second operand has 49 states, 49 states have (on average 3.4285714285714284) internal successors, (168), 49 states have internal predecessors, (168), 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) [2024-11-08 18:13:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:45,919 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2024-11-08 18:13:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 18:13:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.4285714285714284) internal successors, (168), 49 states have internal predecessors, (168), 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 98 [2024-11-08 18:13:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:45,921 INFO L225 Difference]: With dead ends: 221 [2024-11-08 18:13:45,921 INFO L226 Difference]: Without dead ends: 183 [2024-11-08 18:13:45,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=174, Invalid=3018, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 18:13:45,923 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:45,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 948 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 18:13:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-08 18:13:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-08 18:13:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.054945054945055) internal successors, (192), 182 states have internal predecessors, (192), 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) [2024-11-08 18:13:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 192 transitions. [2024-11-08 18:13:45,930 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 192 transitions. Word has length 98 [2024-11-08 18:13:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:45,930 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 192 transitions. [2024-11-08 18:13:45,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.4285714285714284) internal successors, (168), 49 states have internal predecessors, (168), 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) [2024-11-08 18:13:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 192 transitions. [2024-11-08 18:13:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-08 18:13:45,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:45,933 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:45,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-08 18:13:46,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 18:13:46,137 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:46,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1761696770, now seen corresponding path program 15 times [2024-11-08 18:13:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485127517] [2024-11-08 18:13:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:46,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 140 proven. 370 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 18:13:47,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:47,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485127517] [2024-11-08 18:13:47,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485127517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:47,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146546893] [2024-11-08 18:13:47,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:13:47,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:47,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:47,426 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 18:13:47,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-08 18:13:47,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:13:47,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 18:13:47,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 140 proven. 370 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 18:13:48,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 140 proven. 370 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 18:13:49,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146546893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:49,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:49,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2024-11-08 18:13:49,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797763929] [2024-11-08 18:13:49,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:49,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-08 18:13:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-08 18:13:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 18:13:49,828 INFO L87 Difference]: Start difference. First operand 183 states and 192 transitions. Second operand has 52 states, 52 states have (on average 3.519230769230769) internal successors, (183), 52 states have internal predecessors, (183), 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) [2024-11-08 18:13:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:51,731 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2024-11-08 18:13:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 18:13:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.519230769230769) internal successors, (183), 52 states have internal predecessors, (183), 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 102 [2024-11-08 18:13:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:51,733 INFO L225 Difference]: With dead ends: 225 [2024-11-08 18:13:51,734 INFO L226 Difference]: Without dead ends: 183 [2024-11-08 18:13:51,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=185, Invalid=3475, Unknown=0, NotChecked=0, Total=3660 [2024-11-08 18:13:51,736 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 26 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:51,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1121 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 18:13:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-08 18:13:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-08 18:13:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0494505494505495) internal successors, (191), 182 states have internal predecessors, (191), 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) [2024-11-08 18:13:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 191 transitions. [2024-11-08 18:13:51,745 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 191 transitions. Word has length 102 [2024-11-08 18:13:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:51,745 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 191 transitions. [2024-11-08 18:13:51,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.519230769230769) internal successors, (183), 52 states have internal predecessors, (183), 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) [2024-11-08 18:13:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 191 transitions. [2024-11-08 18:13:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-08 18:13:51,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:51,748 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:51,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-08 18:13:51,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-08 18:13:51,949 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:51,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1440638232, now seen corresponding path program 16 times [2024-11-08 18:13:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:51,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625570940] [2024-11-08 18:13:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:13:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:13:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 24 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:13:53,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625570940] [2024-11-08 18:13:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625570940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:13:53,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494501055] [2024-11-08 18:13:53,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:13:53,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:13:53,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:13:53,498 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:13:53,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 18:13:54,210 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:13:54,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:13:54,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-08 18:13:54,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:13:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 24 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:54,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:13:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 24 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:13:56,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494501055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:13:56,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:13:56,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2024-11-08 18:13:56,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951039168] [2024-11-08 18:13:56,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:13:56,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 18:13:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:13:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 18:13:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 18:13:56,817 INFO L87 Difference]: Start difference. First operand 183 states and 191 transitions. Second operand has 60 states, 60 states have (on average 3.533333333333333) internal successors, (212), 60 states have internal predecessors, (212), 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) [2024-11-08 18:13:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:13:59,690 INFO L93 Difference]: Finished difference Result 231 states and 238 transitions. [2024-11-08 18:13:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-08 18:13:59,691 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.533333333333333) internal successors, (212), 60 states have internal predecessors, (212), 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 106 [2024-11-08 18:13:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:13:59,693 INFO L225 Difference]: With dead ends: 231 [2024-11-08 18:13:59,693 INFO L226 Difference]: Without dead ends: 181 [2024-11-08 18:13:59,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=215, Invalid=4755, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 18:13:59,695 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 2671 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 18:13:59,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1651 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2671 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 18:13:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-08 18:13:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-08 18:13:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0444444444444445) internal successors, (188), 180 states have internal predecessors, (188), 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) [2024-11-08 18:13:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 188 transitions. [2024-11-08 18:13:59,704 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 188 transitions. Word has length 106 [2024-11-08 18:13:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:13:59,704 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 188 transitions. [2024-11-08 18:13:59,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.533333333333333) internal successors, (212), 60 states have internal predecessors, (212), 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) [2024-11-08 18:13:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 188 transitions. [2024-11-08 18:13:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-08 18:13:59,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:13:59,708 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:13:59,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 18:13:59,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-08 18:13:59,909 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:13:59,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:13:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2032980362, now seen corresponding path program 17 times [2024-11-08 18:13:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:13:59,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460198546] [2024-11-08 18:13:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:13:59,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:14:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:14:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 351 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:03,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:14:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460198546] [2024-11-08 18:14:03,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460198546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:14:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173807227] [2024-11-08 18:14:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:14:03,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:14:03,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:14:03,179 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:14:03,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 18:14:03,741 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-08 18:14:03,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:14:03,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-08 18:14:03,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:14:03,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:14:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 253 proven. 406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 18:14:05,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:14:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 417 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 18:14:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173807227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:14:09,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:14:09,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 86 [2024-11-08 18:14:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205799443] [2024-11-08 18:14:09,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:14:09,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-08 18:14:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:14:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-08 18:14:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=6494, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 18:14:09,255 INFO L87 Difference]: Start difference. First operand 181 states and 188 transitions. Second operand has 87 states, 86 states have (on average 3.6744186046511627) internal successors, (316), 87 states have internal predecessors, (316), 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) [2024-11-08 18:14:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:14:14,458 INFO L93 Difference]: Finished difference Result 243 states and 249 transitions. [2024-11-08 18:14:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-08 18:14:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.6744186046511627) internal successors, (316), 87 states have internal predecessors, (316), 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 114 [2024-11-08 18:14:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:14:14,460 INFO L225 Difference]: With dead ends: 243 [2024-11-08 18:14:14,460 INFO L226 Difference]: Without dead ends: 243 [2024-11-08 18:14:14,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3962 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1589, Invalid=12453, Unknown=0, NotChecked=0, Total=14042 [2024-11-08 18:14:14,463 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 3 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 3436 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 3436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-08 18:14:14,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1315 Invalid, 3436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3436 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-08 18:14:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-08 18:14:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 133. [2024-11-08 18:14:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 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) [2024-11-08 18:14:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2024-11-08 18:14:14,469 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 114 [2024-11-08 18:14:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:14:14,469 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2024-11-08 18:14:14,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.6744186046511627) internal successors, (316), 87 states have internal predecessors, (316), 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) [2024-11-08 18:14:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2024-11-08 18:14:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-08 18:14:14,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:14:14,472 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:14:14,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 18:14:14,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 18:14:14,673 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:14:14,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:14:14,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1045319718, now seen corresponding path program 18 times [2024-11-08 18:14:14,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:14:14,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922315908] [2024-11-08 18:14:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:14:14,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:14:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:14:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 26 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:16,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:14:16,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922315908] [2024-11-08 18:14:16,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922315908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:14:16,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45131382] [2024-11-08 18:14:16,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:14:16,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:14:16,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:14:16,117 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:14:16,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 18:14:16,701 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-08 18:14:16,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:14:16,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-08 18:14:16,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:14:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 26 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:16,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:14:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 26 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:18,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45131382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:14:18,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:14:18,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2024-11-08 18:14:18,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092326766] [2024-11-08 18:14:18,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:14:18,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-08 18:14:18,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:14:18,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-08 18:14:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2024-11-08 18:14:18,959 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 64 states, 64 states have (on average 3.5625) internal successors, (228), 64 states have internal predecessors, (228), 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) [2024-11-08 18:14:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:14:21,335 INFO L93 Difference]: Finished difference Result 187 states and 190 transitions. [2024-11-08 18:14:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 18:14:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.5625) internal successors, (228), 64 states have internal predecessors, (228), 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 114 [2024-11-08 18:14:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:14:21,337 INFO L225 Difference]: With dead ends: 187 [2024-11-08 18:14:21,337 INFO L226 Difference]: Without dead ends: 133 [2024-11-08 18:14:21,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=230, Invalid=5470, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 18:14:21,339 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:14:21,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1902 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3039 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-08 18:14:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-08 18:14:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-08 18:14:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 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) [2024-11-08 18:14:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2024-11-08 18:14:21,345 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 114 [2024-11-08 18:14:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:14:21,345 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2024-11-08 18:14:21,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.5625) internal successors, (228), 64 states have internal predecessors, (228), 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) [2024-11-08 18:14:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2024-11-08 18:14:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-08 18:14:21,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:14:21,347 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:14:21,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-08 18:14:21,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 18:14:21,552 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:14:21,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:14:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1615812898, now seen corresponding path program 19 times [2024-11-08 18:14:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:14:21,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483664643] [2024-11-08 18:14:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:14:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:14:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:14:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 300 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:24,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:14:24,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483664643] [2024-11-08 18:14:24,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483664643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:14:24,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180769878] [2024-11-08 18:14:24,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:14:24,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:14:24,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:14:24,190 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:14:24,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 18:14:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:14:24,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-08 18:14:24,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:14:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 351 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:25,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:14:26,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-08 18:14:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 351 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180769878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:14:27,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:14:27,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 69 [2024-11-08 18:14:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769279654] [2024-11-08 18:14:27,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:14:27,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-08 18:14:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:14:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-08 18:14:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=4286, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 18:14:27,157 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 70 states, 69 states have (on average 3.463768115942029) internal successors, (239), 70 states have internal predecessors, (239), 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) [2024-11-08 18:14:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:14:29,371 INFO L93 Difference]: Finished difference Result 187 states and 190 transitions. [2024-11-08 18:14:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-08 18:14:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.463768115942029) internal successors, (239), 70 states have internal predecessors, (239), 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 118 [2024-11-08 18:14:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:14:29,373 INFO L225 Difference]: With dead ends: 187 [2024-11-08 18:14:29,373 INFO L226 Difference]: Without dead ends: 187 [2024-11-08 18:14:29,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 14 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=722, Invalid=6250, Unknown=0, NotChecked=0, Total=6972 [2024-11-08 18:14:29,375 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 18:14:29,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 816 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2588 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 18:14:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-08 18:14:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2024-11-08 18:14:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 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) [2024-11-08 18:14:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2024-11-08 18:14:29,380 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 118 [2024-11-08 18:14:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:14:29,381 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2024-11-08 18:14:29,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.463768115942029) internal successors, (239), 70 states have internal predecessors, (239), 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) [2024-11-08 18:14:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2024-11-08 18:14:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-08 18:14:29,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:14:29,382 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:14:29,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-08 18:14:29,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:14:29,583 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:14:29,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:14:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1998585444, now seen corresponding path program 20 times [2024-11-08 18:14:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:14:29,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592212707] [2024-11-08 18:14:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:14:29,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:14:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:14:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 28 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:31,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:14:31,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592212707] [2024-11-08 18:14:31,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592212707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:14:31,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655227143] [2024-11-08 18:14:31,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:14:31,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:14:31,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:14:31,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:14:31,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 18:14:31,595 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:14:31,595 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:14:31,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-08 18:14:31,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:14:31,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-08 18:14:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:14:37,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:14:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-08 18:14:46,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655227143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:14:46,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:14:46,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 49, 35] total 116 [2024-11-08 18:14:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442387587] [2024-11-08 18:14:46,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:14:46,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-08 18:14:46,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:14:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-08 18:14:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=12630, Unknown=0, NotChecked=0, Total=13340 [2024-11-08 18:14:46,539 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 116 states, 116 states have (on average 2.6379310344827585) internal successors, (306), 116 states have internal predecessors, (306), 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) [2024-11-08 18:15:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:15:43,445 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2024-11-08 18:15:43,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2024-11-08 18:15:43,447 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.6379310344827585) internal successors, (306), 116 states have internal predecessors, (306), 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 122 [2024-11-08 18:15:43,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:15:43,448 INFO L225 Difference]: With dead ends: 248 [2024-11-08 18:15:43,449 INFO L226 Difference]: Without dead ends: 190 [2024-11-08 18:15:43,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16297 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=6944, Invalid=66768, Unknown=0, NotChecked=0, Total=73712 [2024-11-08 18:15:43,460 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 351 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 8032 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 8430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 8032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-08 18:15:43,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1135 Invalid, 8430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [398 Valid, 8032 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-08 18:15:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-08 18:15:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2024-11-08 18:15:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 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) [2024-11-08 18:15:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2024-11-08 18:15:43,469 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 122 [2024-11-08 18:15:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:15:43,470 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2024-11-08 18:15:43,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.6379310344827585) internal successors, (306), 116 states have internal predecessors, (306), 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) [2024-11-08 18:15:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2024-11-08 18:15:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-08 18:15:43,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:15:43,473 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:43,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-08 18:15:43,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:43,674 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:15:43,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2069581322, now seen corresponding path program 21 times [2024-11-08 18:15:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:43,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962872109] [2024-11-08 18:15:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 870 proven. 855 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-08 18:15:46,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962872109] [2024-11-08 18:15:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962872109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684562323] [2024-11-08 18:15:46,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:15:46,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:46,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:46,791 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:46,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 18:15:49,004 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-11-08 18:15:49,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:15:49,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-08 18:15:49,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 870 proven. 855 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-08 18:15:49,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 870 proven. 855 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-08 18:15:53,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684562323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:53,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:53,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 73 [2024-11-08 18:15:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132620982] [2024-11-08 18:15:53,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:53,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-08 18:15:53,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-08 18:15:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5062, Unknown=0, NotChecked=0, Total=5256 [2024-11-08 18:15:53,023 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 73 states, 73 states have (on average 3.6164383561643834) internal successors, (264), 73 states have internal predecessors, (264), 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) [2024-11-08 18:15:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:15:56,680 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2024-11-08 18:15:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-08 18:15:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.6164383561643834) internal successors, (264), 73 states have internal predecessors, (264), 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 186 [2024-11-08 18:15:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:15:56,682 INFO L225 Difference]: With dead ends: 256 [2024-11-08 18:15:56,682 INFO L226 Difference]: Without dead ends: 194 [2024-11-08 18:15:56,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=264, Invalid=7218, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 18:15:56,684 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 33 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 4288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:15:56,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2508 Invalid, 4288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-08 18:15:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-08 18:15:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2024-11-08 18:15:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 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) [2024-11-08 18:15:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2024-11-08 18:15:56,690 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 186 [2024-11-08 18:15:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:15:56,691 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2024-11-08 18:15:56,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.6164383561643834) internal successors, (264), 73 states have internal predecessors, (264), 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) [2024-11-08 18:15:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2024-11-08 18:15:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-08 18:15:56,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:15:56,693 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:56,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-08 18:15:56,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-08 18:15:56,894 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:15:56,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1680806062, now seen corresponding path program 22 times [2024-11-08 18:15:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805826218] [2024-11-08 18:15:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 864 proven. 976 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2024-11-08 18:15:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805826218] [2024-11-08 18:15:59,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805826218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573984087] [2024-11-08 18:15:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:15:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:59,545 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:59,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 18:16:00,295 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:16:00,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:00,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-08 18:16:00,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 864 proven. 976 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2024-11-08 18:16:00,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 864 proven. 976 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2024-11-08 18:16:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573984087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:04,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 77 [2024-11-08 18:16:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476755916] [2024-11-08 18:16:04,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:04,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-08 18:16:04,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-08 18:16:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=5648, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 18:16:04,234 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 77 states, 77 states have (on average 3.6363636363636362) internal successors, (280), 77 states have internal predecessors, (280), 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) [2024-11-08 18:16:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:16:08,011 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2024-11-08 18:16:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-08 18:16:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.6363636363636362) internal successors, (280), 77 states have internal predecessors, (280), 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 190 [2024-11-08 18:16:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:16:08,013 INFO L225 Difference]: With dead ends: 264 [2024-11-08 18:16:08,013 INFO L226 Difference]: Without dead ends: 198 [2024-11-08 18:16:08,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=279, Invalid=8093, Unknown=0, NotChecked=0, Total=8372 [2024-11-08 18:16:08,015 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 4269 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:16:08,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2555 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4269 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-08 18:16:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-08 18:16:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2024-11-08 18:16:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 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) [2024-11-08 18:16:08,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2024-11-08 18:16:08,021 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 190 [2024-11-08 18:16:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:16:08,021 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2024-11-08 18:16:08,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.6363636363636362) internal successors, (280), 77 states have internal predecessors, (280), 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) [2024-11-08 18:16:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2024-11-08 18:16:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-08 18:16:08,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:16:08,023 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:08,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-08 18:16:08,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-08 18:16:08,224 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:16:08,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1518644378, now seen corresponding path program 23 times [2024-11-08 18:16:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364536739] [2024-11-08 18:16:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 850 proven. 1105 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-08 18:16:10,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364536739] [2024-11-08 18:16:10,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364536739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506401287] [2024-11-08 18:16:10,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:16:10,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:10,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:10,303 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:10,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 18:16:11,050 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2024-11-08 18:16:11,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:11,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-08 18:16:11,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 850 proven. 1105 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-08 18:16:11,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 850 proven. 1105 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-08 18:16:14,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506401287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:14,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:14,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2024-11-08 18:16:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807468988] [2024-11-08 18:16:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:14,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-08 18:16:14,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-08 18:16:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2024-11-08 18:16:14,554 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 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) [2024-11-08 18:16:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:16:18,428 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2024-11-08 18:16:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-08 18:16:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 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 194 [2024-11-08 18:16:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:16:18,430 INFO L225 Difference]: With dead ends: 272 [2024-11-08 18:16:18,430 INFO L226 Difference]: Without dead ends: 202 [2024-11-08 18:16:18,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=290, Invalid=8830, Unknown=0, NotChecked=0, Total=9120 [2024-11-08 18:16:18,431 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 40 mSDsluCounter, 2852 mSDsCounter, 0 mSdLazyCounter, 4888 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-08 18:16:18,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2909 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4888 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-08 18:16:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-08 18:16:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2024-11-08 18:16:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 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) [2024-11-08 18:16:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2024-11-08 18:16:18,435 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2024-11-08 18:16:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:16:18,435 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2024-11-08 18:16:18,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 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) [2024-11-08 18:16:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2024-11-08 18:16:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-08 18:16:18,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:16:18,437 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:18,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-08 18:16:18,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-08 18:16:18,639 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:16:18,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:18,640 INFO L85 PathProgramCache]: Analyzing trace with hash 217545246, now seen corresponding path program 24 times [2024-11-08 18:16:18,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:18,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827324027] [2024-11-08 18:16:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:18,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 828 proven. 1242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-11-08 18:16:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827324027] [2024-11-08 18:16:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827324027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:20,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442111328] [2024-11-08 18:16:20,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:16:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:20,722 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:20,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 18:16:26,289 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2024-11-08 18:16:26,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:26,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-08 18:16:26,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 828 proven. 1242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-11-08 18:16:26,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 828 proven. 1242 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-11-08 18:16:30,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442111328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:30,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:30,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 85 [2024-11-08 18:16:30,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506374749] [2024-11-08 18:16:30,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:30,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-08 18:16:30,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-08 18:16:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=6916, Unknown=0, NotChecked=0, Total=7140 [2024-11-08 18:16:30,113 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 85 states, 85 states have (on average 3.6705882352941175) internal successors, (312), 85 states have internal predecessors, (312), 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) [2024-11-08 18:16:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:16:34,247 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2024-11-08 18:16:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 18:16:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.6705882352941175) internal successors, (312), 85 states have internal predecessors, (312), 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 198 [2024-11-08 18:16:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:16:34,250 INFO L225 Difference]: With dead ends: 280 [2024-11-08 18:16:34,250 INFO L226 Difference]: Without dead ends: 206 [2024-11-08 18:16:34,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=309, Invalid=9993, Unknown=0, NotChecked=0, Total=10302 [2024-11-08 18:16:34,252 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 3411 mSDsCounter, 0 mSdLazyCounter, 5828 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 5847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:16:34,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3471 Invalid, 5847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5828 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-08 18:16:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-08 18:16:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2024-11-08 18:16:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 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) [2024-11-08 18:16:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2024-11-08 18:16:34,258 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 198 [2024-11-08 18:16:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:16:34,258 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2024-11-08 18:16:34,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.6705882352941175) internal successors, (312), 85 states have internal predecessors, (312), 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) [2024-11-08 18:16:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2024-11-08 18:16:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-08 18:16:34,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:16:34,260 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:34,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 18:16:34,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:34,461 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:16:34,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2014414038, now seen corresponding path program 25 times [2024-11-08 18:16:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:34,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628011815] [2024-11-08 18:16:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 798 proven. 1387 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-08 18:16:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628011815] [2024-11-08 18:16:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628011815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837468638] [2024-11-08 18:16:36,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:16:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:36,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:36,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 18:16:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:37,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-08 18:16:37,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 798 proven. 1387 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-08 18:16:37,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 798 proven. 1387 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-08 18:16:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837468638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:40,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:40,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 89 [2024-11-08 18:16:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871150211] [2024-11-08 18:16:40,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:40,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-08 18:16:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-08 18:16:40,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=7598, Unknown=0, NotChecked=0, Total=7832 [2024-11-08 18:16:40,928 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 89 states, 89 states have (on average 3.6853932584269664) internal successors, (328), 89 states have internal predecessors, (328), 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) [2024-11-08 18:16:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:16:45,196 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2024-11-08 18:16:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-08 18:16:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.6853932584269664) internal successors, (328), 89 states have internal predecessors, (328), 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 202 [2024-11-08 18:16:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:16:45,198 INFO L225 Difference]: With dead ends: 288 [2024-11-08 18:16:45,198 INFO L226 Difference]: Without dead ends: 210 [2024-11-08 18:16:45,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=324, Invalid=11018, Unknown=0, NotChecked=0, Total=11342 [2024-11-08 18:16:45,199 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 4211 mSDsCounter, 0 mSdLazyCounter, 7304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 4274 SdHoareTripleChecker+Invalid, 7323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 7304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-08 18:16:45,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 4274 Invalid, 7323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 7304 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-08 18:16:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-08 18:16:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2024-11-08 18:16:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 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) [2024-11-08 18:16:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2024-11-08 18:16:45,203 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 202 [2024-11-08 18:16:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:16:45,204 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2024-11-08 18:16:45,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.6853932584269664) internal successors, (328), 89 states have internal predecessors, (328), 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) [2024-11-08 18:16:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2024-11-08 18:16:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-08 18:16:45,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:16:45,205 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:45,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-08 18:16:45,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-08 18:16:45,406 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:16:45,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1563915150, now seen corresponding path program 26 times [2024-11-08 18:16:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792467928] [2024-11-08 18:16:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 760 proven. 1540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-08 18:16:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792467928] [2024-11-08 18:16:47,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792467928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50500829] [2024-11-08 18:16:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:16:47,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:47,334 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:47,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-08 18:16:47,679 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:16:47,679 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:47,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 294 conjuncts are in the unsatisfiable core [2024-11-08 18:16:47,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:47,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-08 18:16:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 114 proven. 2348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:55,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:17:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 1654 proven. 808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:04,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50500829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:17:04,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:17:04,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 56, 56] total 154 [2024-11-08 18:17:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435812276] [2024-11-08 18:17:04,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:17:04,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2024-11-08 18:17:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:17:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2024-11-08 18:17:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2031, Invalid=21531, Unknown=0, NotChecked=0, Total=23562 [2024-11-08 18:17:04,581 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 154 states, 154 states have (on average 3.707792207792208) internal successors, (571), 154 states have internal predecessors, (571), 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) [2024-11-08 18:17:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:17:14,491 INFO L93 Difference]: Finished difference Result 441 states and 450 transitions. [2024-11-08 18:17:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-11-08 18:17:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.707792207792208) internal successors, (571), 154 states have internal predecessors, (571), 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 206 [2024-11-08 18:17:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:17:14,493 INFO L225 Difference]: With dead ends: 441 [2024-11-08 18:17:14,493 INFO L226 Difference]: Without dead ends: 243 [2024-11-08 18:17:14,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6920 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=3406, Invalid=40066, Unknown=0, NotChecked=0, Total=43472 [2024-11-08 18:17:14,495 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 9137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 9138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-08 18:17:14,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1573 Invalid, 9138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9137 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-08 18:17:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-08 18:17:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2024-11-08 18:17:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 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) [2024-11-08 18:17:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2024-11-08 18:17:14,500 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 206 [2024-11-08 18:17:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:17:14,501 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2024-11-08 18:17:14,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.707792207792208) internal successors, (571), 154 states have internal predecessors, (571), 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) [2024-11-08 18:17:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2024-11-08 18:17:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2024-11-08 18:17:14,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:17:14,503 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:17:14,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-08 18:17:14,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-08 18:17:14,704 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:17:14,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:17:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1953895418, now seen corresponding path program 27 times [2024-11-08 18:17:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:17:14,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353088515] [2024-11-08 18:17:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:17:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:17:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:17:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 58 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:17,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:17:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353088515] [2024-11-08 18:17:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353088515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:17:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518958189] [2024-11-08 18:17:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:17:17,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:17:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:17:17,884 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:17:17,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-08 18:17:20,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-11-08 18:17:20,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:17:20,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-08 18:17:20,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:17:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 58 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:20,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:17:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 58 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518958189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:17:27,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:17:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 128 [2024-11-08 18:17:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266669201] [2024-11-08 18:17:27,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:17:27,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-11-08 18:17:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:17:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-11-08 18:17:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=15926, Unknown=0, NotChecked=0, Total=16256 [2024-11-08 18:17:27,147 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 128 states, 128 states have (on average 3.78125) internal successors, (484), 128 states have internal predecessors, (484), 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) [2024-11-08 18:17:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:17:35,607 INFO L93 Difference]: Finished difference Result 368 states and 370 transitions. [2024-11-08 18:17:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-08 18:17:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.78125) internal successors, (484), 128 states have internal predecessors, (484), 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 242 [2024-11-08 18:17:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:17:35,610 INFO L225 Difference]: With dead ends: 368 [2024-11-08 18:17:35,610 INFO L226 Difference]: Without dead ends: 250 [2024-11-08 18:17:35,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=470, Invalid=23710, Unknown=0, NotChecked=0, Total=24180 [2024-11-08 18:17:35,612 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 61 mSDsluCounter, 8125 mSDsCounter, 0 mSdLazyCounter, 13388 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 8218 SdHoareTripleChecker+Invalid, 13418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 13388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:17:35,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 8218 Invalid, 13418 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 13388 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-08 18:17:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-08 18:17:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2024-11-08 18:17:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 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) [2024-11-08 18:17:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2024-11-08 18:17:35,617 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 242 [2024-11-08 18:17:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:17:35,617 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2024-11-08 18:17:35,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.78125) internal successors, (484), 128 states have internal predecessors, (484), 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) [2024-11-08 18:17:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2024-11-08 18:17:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2024-11-08 18:17:35,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:17:35,619 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:17:35,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-08 18:17:35,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-08 18:17:35,824 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:17:35,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:17:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1563901250, now seen corresponding path program 28 times [2024-11-08 18:17:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:17:35,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942322058] [2024-11-08 18:17:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:17:35,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:17:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:17:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 1596 proven. 1856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:17:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942322058] [2024-11-08 18:17:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942322058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:17:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229229093] [2024-11-08 18:17:42,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:17:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:17:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:17:42,197 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:17:42,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-08 18:17:43,396 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:17:43,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:17:43,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 284 conjuncts are in the unsatisfiable core [2024-11-08 18:17:43,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:17:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 1711 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:46,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:17:49,214 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 22 treesize of output 18 [2024-11-08 18:17:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 1711 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229229093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:17:52,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:17:52,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 161 [2024-11-08 18:17:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763850481] [2024-11-08 18:17:52,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:17:52,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2024-11-08 18:17:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:17:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2024-11-08 18:17:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3525, Invalid=22557, Unknown=0, NotChecked=0, Total=26082 [2024-11-08 18:17:52,259 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 162 states, 161 states have (on average 3.813664596273292) internal successors, (614), 162 states have internal predecessors, (614), 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) [2024-11-08 18:17:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:17:59,028 INFO L93 Difference]: Finished difference Result 253 states and 255 transitions. [2024-11-08 18:17:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-08 18:17:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 3.813664596273292) internal successors, (614), 162 states have internal predecessors, (614), 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 246 [2024-11-08 18:17:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:17:59,030 INFO L225 Difference]: With dead ends: 253 [2024-11-08 18:17:59,030 INFO L226 Difference]: Without dead ends: 253 [2024-11-08 18:17:59,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12669 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=4171, Invalid=32501, Unknown=0, NotChecked=0, Total=36672 [2024-11-08 18:17:59,033 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 8996 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 8996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-08 18:17:59,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2878 Invalid, 8996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8996 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-08 18:17:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-08 18:17:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2024-11-08 18:17:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 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) [2024-11-08 18:17:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2024-11-08 18:17:59,039 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 246 [2024-11-08 18:17:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:17:59,039 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2024-11-08 18:17:59,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 3.813664596273292) internal successors, (614), 162 states have internal predecessors, (614), 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) [2024-11-08 18:17:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2024-11-08 18:17:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-08 18:17:59,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:17:59,042 INFO L215 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:17:59,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-08 18:17:59,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-08 18:17:59,242 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:17:59,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:17:59,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1224267196, now seen corresponding path program 29 times [2024-11-08 18:17:59,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:17:59,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796411804] [2024-11-08 18:17:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:17:59,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:17:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:18:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 60 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:18:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:18:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796411804] [2024-11-08 18:18:02,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796411804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:18:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284435503] [2024-11-08 18:18:02,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:18:02,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:18:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:18:02,948 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:18:02,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-08 18:18:15,566 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-11-08 18:18:15,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:18:15,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-08 18:18:15,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:18:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 60 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:18:16,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:18:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 60 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:18:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284435503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:18:22,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:18:22,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2024-11-08 18:18:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124843666] [2024-11-08 18:18:22,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:18:22,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2024-11-08 18:18:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:18:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2024-11-08 18:18:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=16952, Unknown=0, NotChecked=0, Total=17292 [2024-11-08 18:18:22,527 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand has 132 states, 132 states have (on average 3.787878787878788) internal successors, (500), 132 states have internal predecessors, (500), 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) [2024-11-08 18:18:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:18:31,482 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2024-11-08 18:18:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-08 18:18:31,483 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.787878787878788) internal successors, (500), 132 states have internal predecessors, (500), 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 250 [2024-11-08 18:18:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:18:31,484 INFO L225 Difference]: With dead ends: 380 [2024-11-08 18:18:31,484 INFO L226 Difference]: Without dead ends: 258 [2024-11-08 18:18:31,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=485, Invalid=25275, Unknown=0, NotChecked=0, Total=25760 [2024-11-08 18:18:31,485 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 66 mSDsluCounter, 8648 mSDsCounter, 0 mSdLazyCounter, 14589 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 8744 SdHoareTripleChecker+Invalid, 14619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 14589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-08 18:18:31,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 8744 Invalid, 14619 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 14589 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-08 18:18:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-08 18:18:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2024-11-08 18:18:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 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) [2024-11-08 18:18:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2024-11-08 18:18:31,490 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 250 [2024-11-08 18:18:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:18:31,490 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2024-11-08 18:18:31,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.787878787878788) internal successors, (500), 132 states have internal predecessors, (500), 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) [2024-11-08 18:18:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2024-11-08 18:18:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-11-08 18:18:31,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:18:31,491 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:18:31,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-08 18:18:31,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-08 18:18:31,692 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:18:31,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:18:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1983891708, now seen corresponding path program 30 times [2024-11-08 18:18:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:18:31,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558117349] [2024-11-08 18:18:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:18:31,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:18:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:18:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1711 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:18:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:18:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558117349] [2024-11-08 18:18:37,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558117349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:18:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792589360] [2024-11-08 18:18:37,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:18:37,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:18:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:18:37,619 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:18:37,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-08 18:19:05,583 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2024-11-08 18:19:05,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:19:05,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 231 conjuncts are in the unsatisfiable core [2024-11-08 18:19:05,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:19:05,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:19:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1830 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:10,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:19:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1830 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:18,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792589360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:19:18,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:19:18,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 199 [2024-11-08 18:19:18,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151013785] [2024-11-08 18:19:18,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:19:18,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2024-11-08 18:19:18,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:19:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2024-11-08 18:19:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5682, Invalid=34118, Unknown=0, NotChecked=0, Total=39800 [2024-11-08 18:19:18,114 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 200 states, 199 states have (on average 3.7889447236180906) internal successors, (754), 200 states have internal predecessors, (754), 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) [2024-11-08 18:19:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:19:24,069 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2024-11-08 18:19:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-08 18:19:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 199 states have (on average 3.7889447236180906) internal successors, (754), 200 states have internal predecessors, (754), 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 254 [2024-11-08 18:19:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:19:24,071 INFO L225 Difference]: With dead ends: 261 [2024-11-08 18:19:24,071 INFO L226 Difference]: Without dead ends: 261 [2024-11-08 18:19:24,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19732 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=6919, Invalid=46211, Unknown=0, NotChecked=0, Total=53130 [2024-11-08 18:19:24,073 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 5 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 5913 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 5913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 18:19:24,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2365 Invalid, 5913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5913 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 18:19:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-08 18:19:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2024-11-08 18:19:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 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) [2024-11-08 18:19:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2024-11-08 18:19:24,078 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 254 [2024-11-08 18:19:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:19:24,078 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2024-11-08 18:19:24,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 199 states have (on average 3.7889447236180906) internal successors, (754), 200 states have internal predecessors, (754), 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) [2024-11-08 18:19:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2024-11-08 18:19:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-08 18:19:24,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:19:24,081 INFO L215 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:19:24,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-08 18:19:24,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-08 18:19:24,281 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:19:24,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:19:24,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1324671362, now seen corresponding path program 31 times [2024-11-08 18:19:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:19:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093376609] [2024-11-08 18:19:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:19:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:19:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:19:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 62 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:27,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:19:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093376609] [2024-11-08 18:19:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093376609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:19:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870764782] [2024-11-08 18:19:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:19:27,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:19:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:19:27,950 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:19:27,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-08 18:19:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:19:28,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-08 18:19:28,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:19:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 62 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:28,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:19:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 62 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:36,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870764782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:19:36,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:19:36,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 136 [2024-11-08 18:19:36,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546536258] [2024-11-08 18:19:36,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:19:36,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2024-11-08 18:19:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:19:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2024-11-08 18:19:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=18010, Unknown=0, NotChecked=0, Total=18360 [2024-11-08 18:19:36,429 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 136 states, 136 states have (on average 3.7941176470588234) internal successors, (516), 136 states have internal predecessors, (516), 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) [2024-11-08 18:19:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:19:46,843 INFO L93 Difference]: Finished difference Result 392 states and 394 transitions. [2024-11-08 18:19:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-08 18:19:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.7941176470588234) internal successors, (516), 136 states have internal predecessors, (516), 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 258 [2024-11-08 18:19:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:19:46,845 INFO L225 Difference]: With dead ends: 392 [2024-11-08 18:19:46,845 INFO L226 Difference]: Without dead ends: 266 [2024-11-08 18:19:46,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=500, Invalid=26890, Unknown=0, NotChecked=0, Total=27390 [2024-11-08 18:19:46,846 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 65 mSDsluCounter, 9790 mSDsCounter, 0 mSdLazyCounter, 16212 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 9889 SdHoareTripleChecker+Invalid, 16243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 16212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-08 18:19:46,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 9889 Invalid, 16243 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 16212 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-08 18:19:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-08 18:19:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2024-11-08 18:19:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 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) [2024-11-08 18:19:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2024-11-08 18:19:46,850 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 258 [2024-11-08 18:19:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:19:46,850 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2024-11-08 18:19:46,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.7941176470588234) internal successors, (516), 136 states have internal predecessors, (516), 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) [2024-11-08 18:19:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2024-11-08 18:19:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-11-08 18:19:46,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:19:46,852 INFO L215 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:19:46,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-08 18:19:47,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-08 18:19:47,052 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:19:47,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:19:47,053 INFO L85 PathProgramCache]: Analyzing trace with hash 601835578, now seen corresponding path program 32 times [2024-11-08 18:19:47,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:19:47,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633788075] [2024-11-08 18:19:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:19:47,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:19:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:19:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 1830 proven. 2108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:53,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:19:53,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633788075] [2024-11-08 18:19:53,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633788075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:19:53,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871758875] [2024-11-08 18:19:53,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:19:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:19:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:19:53,454 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:19:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-08 18:19:53,812 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:19:53,812 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:19:53,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 302 conjuncts are in the unsatisfiable core [2024-11-08 18:19:53,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:19:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 1953 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:19:57,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:00,476 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 22 treesize of output 18 [2024-11-08 18:20:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 1953 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871758875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:04,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 171 [2024-11-08 18:20:04,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420426798] [2024-11-08 18:20:04,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:04,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2024-11-08 18:20:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2024-11-08 18:20:04,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3982, Invalid=25430, Unknown=0, NotChecked=0, Total=29412 [2024-11-08 18:20:04,150 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 172 states, 171 states have (on average 3.824561403508772) internal successors, (654), 172 states have internal predecessors, (654), 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) [2024-11-08 18:20:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:20:11,761 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2024-11-08 18:20:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-08 18:20:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 171 states have (on average 3.824561403508772) internal successors, (654), 172 states have internal predecessors, (654), 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 262 [2024-11-08 18:20:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:20:11,762 INFO L225 Difference]: With dead ends: 269 [2024-11-08 18:20:11,762 INFO L226 Difference]: Without dead ends: 269 [2024-11-08 18:20:11,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14378 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4703, Invalid=36709, Unknown=0, NotChecked=0, Total=41412 [2024-11-08 18:20:11,766 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 9068 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 9068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-08 18:20:11,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3182 Invalid, 9068 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9068 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-08 18:20:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-08 18:20:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2024-11-08 18:20:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 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) [2024-11-08 18:20:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2024-11-08 18:20:11,771 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 262 [2024-11-08 18:20:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:20:11,772 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2024-11-08 18:20:11,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 171 states have (on average 3.824561403508772) internal successors, (654), 172 states have internal predecessors, (654), 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) [2024-11-08 18:20:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2024-11-08 18:20:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-08 18:20:11,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:20:11,774 INFO L215 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:11,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-08 18:20:11,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:11,975 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:20:11,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash 371626432, now seen corresponding path program 33 times [2024-11-08 18:20:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:11,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204921808] [2024-11-08 18:20:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:11,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:20:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 64 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:16,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:20:16,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204921808] [2024-11-08 18:20:16,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204921808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:20:16,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530622918] [2024-11-08 18:20:16,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:20:16,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:16,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:20:16,174 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:20:16,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-08 18:20:36,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2024-11-08 18:20:36,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:20:36,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-08 18:20:36,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:20:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 64 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:37,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:20:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 64 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:20:44,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530622918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:20:44,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:20:44,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 141 [2024-11-08 18:20:44,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782415920] [2024-11-08 18:20:44,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:20:44,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-11-08 18:20:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:20:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-11-08 18:20:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=19376, Unknown=0, NotChecked=0, Total=19740 [2024-11-08 18:20:44,855 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 141 states, 141 states have (on average 3.780141843971631) internal successors, (533), 141 states have internal predecessors, (533), 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) [2024-11-08 18:20:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:20:55,094 INFO L93 Difference]: Finished difference Result 404 states and 406 transitions. [2024-11-08 18:20:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-08 18:20:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 3.780141843971631) internal successors, (533), 141 states have internal predecessors, (533), 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 266 [2024-11-08 18:20:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:20:55,095 INFO L225 Difference]: With dead ends: 404 [2024-11-08 18:20:55,095 INFO L226 Difference]: Without dead ends: 274 [2024-11-08 18:20:55,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3182 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=519, Invalid=28893, Unknown=0, NotChecked=0, Total=29412 [2024-11-08 18:20:55,097 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 67 mSDsluCounter, 9896 mSDsCounter, 0 mSdLazyCounter, 16693 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 9998 SdHoareTripleChecker+Invalid, 16726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 16693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:20:55,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 9998 Invalid, 16726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 16693 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-08 18:20:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-08 18:20:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2024-11-08 18:20:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 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) [2024-11-08 18:20:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2024-11-08 18:20:55,102 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 266 [2024-11-08 18:20:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:20:55,103 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2024-11-08 18:20:55,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 3.780141843971631) internal successors, (533), 141 states have internal predecessors, (533), 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) [2024-11-08 18:20:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2024-11-08 18:20:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-08 18:20:55,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:20:55,105 INFO L215 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:20:55,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-08 18:20:55,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:20:55,306 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:20:55,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:20:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash 914014328, now seen corresponding path program 34 times [2024-11-08 18:20:55,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:20:55,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939412585] [2024-11-08 18:20:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:20:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:20:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 1953 proven. 2240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:01,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:01,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939412585] [2024-11-08 18:21:01,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939412585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:01,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760537263] [2024-11-08 18:21:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:21:01,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:01,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:01,738 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:01,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-08 18:21:03,061 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:21:03,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:21:03,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 311 conjuncts are in the unsatisfiable core [2024-11-08 18:21:03,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 2080 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:06,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:09,408 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 22 treesize of output 18 [2024-11-08 18:21:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 2080 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:12,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760537263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:12,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:12,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 176 [2024-11-08 18:21:12,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019096517] [2024-11-08 18:21:12,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:12,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2024-11-08 18:21:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2024-11-08 18:21:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4221, Invalid=26931, Unknown=0, NotChecked=0, Total=31152 [2024-11-08 18:21:12,955 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 177 states, 176 states have (on average 3.8295454545454546) internal successors, (674), 177 states have internal predecessors, (674), 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) [2024-11-08 18:21:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:21:20,751 INFO L93 Difference]: Finished difference Result 277 states and 279 transitions. [2024-11-08 18:21:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-08 18:21:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 176 states have (on average 3.8295454545454546) internal successors, (674), 177 states have internal predecessors, (674), 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 270 [2024-11-08 18:21:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:21:20,753 INFO L225 Difference]: With dead ends: 277 [2024-11-08 18:21:20,753 INFO L226 Difference]: Without dead ends: 277 [2024-11-08 18:21:20,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4981, Invalid=38909, Unknown=0, NotChecked=0, Total=43890 [2024-11-08 18:21:20,755 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 3363 mSDsCounter, 0 mSdLazyCounter, 10348 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 10348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-08 18:21:20,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 3434 Invalid, 10348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10348 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-08 18:21:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-08 18:21:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2024-11-08 18:21:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.010948905109489) internal successors, (277), 274 states have internal predecessors, (277), 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) [2024-11-08 18:21:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2024-11-08 18:21:20,760 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 270 [2024-11-08 18:21:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:21:20,761 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2024-11-08 18:21:20,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 176 states have (on average 3.8295454545454546) internal successors, (674), 177 states have internal predecessors, (674), 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) [2024-11-08 18:21:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2024-11-08 18:21:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-11-08 18:21:20,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:21:20,763 INFO L215 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:20,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-08 18:21:20,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:20,964 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:21:20,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash 28293886, now seen corresponding path program 35 times [2024-11-08 18:21:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:20,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962298105] [2024-11-08 18:21:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 66 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:25,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:25,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962298105] [2024-11-08 18:21:25,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962298105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:25,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719544423] [2024-11-08 18:21:25,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:21:25,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:25,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:25,106 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:25,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-08 18:21:31,758 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2024-11-08 18:21:31,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:21:31,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-08 18:21:31,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 66 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:32,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 66 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:40,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719544423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:40,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:40,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 144 [2024-11-08 18:21:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155255531] [2024-11-08 18:21:40,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:40,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-11-08 18:21:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-11-08 18:21:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=20222, Unknown=0, NotChecked=0, Total=20592 [2024-11-08 18:21:40,061 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand has 144 states, 144 states have (on average 3.8055555555555554) internal successors, (548), 144 states have internal predecessors, (548), 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) [2024-11-08 18:21:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:21:51,369 INFO L93 Difference]: Finished difference Result 416 states and 418 transitions. [2024-11-08 18:21:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-11-08 18:21:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.8055555555555554) internal successors, (548), 144 states have internal predecessors, (548), 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 274 [2024-11-08 18:21:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:21:51,371 INFO L225 Difference]: With dead ends: 416 [2024-11-08 18:21:51,371 INFO L226 Difference]: Without dead ends: 282 [2024-11-08 18:21:51,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=530, Invalid=30270, Unknown=0, NotChecked=0, Total=30800 [2024-11-08 18:21:51,374 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 72 mSDsluCounter, 11531 mSDsCounter, 0 mSdLazyCounter, 19177 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 11636 SdHoareTripleChecker+Invalid, 19210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 19177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:21:51,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 11636 Invalid, 19210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 19177 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-08 18:21:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-08 18:21:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2024-11-08 18:21:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 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) [2024-11-08 18:21:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2024-11-08 18:21:51,380 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 274 [2024-11-08 18:21:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:21:51,380 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2024-11-08 18:21:51,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.8055555555555554) internal successors, (548), 144 states have internal predecessors, (548), 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) [2024-11-08 18:21:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2024-11-08 18:21:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-11-08 18:21:51,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:21:51,383 INFO L215 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:51,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-08 18:21:51,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:51,584 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:21:51,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1797632438, now seen corresponding path program 36 times [2024-11-08 18:21:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201282125] [2024-11-08 18:21:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:51,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4456 backedges. 2080 proven. 2376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:58,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201282125] [2024-11-08 18:21:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201282125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994533462] [2024-11-08 18:21:58,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:21:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:58,679 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:58,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-08 18:22:16,630 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-08 18:22:16,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:16,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 252 conjuncts are in the unsatisfiable core [2024-11-08 18:22:16,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:16,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:22:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4456 backedges. 2211 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:22,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4456 backedges. 2211 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994533462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:31,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 217 [2024-11-08 18:22:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550325981] [2024-11-08 18:22:31,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:31,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2024-11-08 18:22:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2024-11-08 18:22:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6789, Invalid=40517, Unknown=0, NotChecked=0, Total=47306 [2024-11-08 18:22:31,803 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 218 states, 217 states have (on average 3.806451612903226) internal successors, (826), 218 states have internal predecessors, (826), 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) [2024-11-08 18:22:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:22:38,690 INFO L93 Difference]: Finished difference Result 285 states and 287 transitions. [2024-11-08 18:22:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-11-08 18:22:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 217 states have (on average 3.806451612903226) internal successors, (826), 218 states have internal predecessors, (826), 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 278 [2024-11-08 18:22:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:22:38,692 INFO L225 Difference]: With dead ends: 285 [2024-11-08 18:22:38,693 INFO L226 Difference]: Without dead ends: 285 [2024-11-08 18:22:38,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23632 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=8248, Invalid=55004, Unknown=0, NotChecked=0, Total=63252 [2024-11-08 18:22:38,696 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 6 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 6304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2746 SdHoareTripleChecker+Invalid, 6304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:22:38,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2746 Invalid, 6304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6304 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-08 18:22:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-08 18:22:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2024-11-08 18:22:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 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) [2024-11-08 18:22:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2024-11-08 18:22:38,702 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 278 [2024-11-08 18:22:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:22:38,702 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2024-11-08 18:22:38,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 217 states have (on average 3.806451612903226) internal successors, (826), 218 states have internal predecessors, (826), 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) [2024-11-08 18:22:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2024-11-08 18:22:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2024-11-08 18:22:38,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:22:38,705 INFO L215 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:22:38,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-08 18:22:38,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-08 18:22:38,905 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:22:38,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash 417586492, now seen corresponding path program 37 times [2024-11-08 18:22:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:38,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943616502] [2024-11-08 18:22:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:38,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 68 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:43,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943616502] [2024-11-08 18:22:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943616502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5166633] [2024-11-08 18:22:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:22:43,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:43,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:43,531 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:43,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-08 18:22:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:44,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-08 18:22:44,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 68 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:44,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 68 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:22:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5166633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:53,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:53,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 149 [2024-11-08 18:22:53,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395494814] [2024-11-08 18:22:53,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:53,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2024-11-08 18:22:53,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2024-11-08 18:22:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=21668, Unknown=0, NotChecked=0, Total=22052 [2024-11-08 18:22:53,007 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 149 states, 149 states have (on average 3.791946308724832) internal successors, (565), 149 states have internal predecessors, (565), 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) [2024-11-08 18:23:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:23:05,121 INFO L93 Difference]: Finished difference Result 428 states and 430 transitions. [2024-11-08 18:23:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-11-08 18:23:05,122 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.791946308724832) internal successors, (565), 149 states have internal predecessors, (565), 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 282 [2024-11-08 18:23:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:23:05,124 INFO L225 Difference]: With dead ends: 428 [2024-11-08 18:23:05,124 INFO L226 Difference]: Without dead ends: 290 [2024-11-08 18:23:05,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=549, Invalid=32393, Unknown=0, NotChecked=0, Total=32942 [2024-11-08 18:23:05,126 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 71 mSDsluCounter, 11900 mSDsCounter, 0 mSdLazyCounter, 20050 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 12008 SdHoareTripleChecker+Invalid, 20084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 20050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-08 18:23:05,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 12008 Invalid, 20084 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 20050 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-11-08 18:23:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-08 18:23:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2024-11-08 18:23:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.0104895104895104) internal successors, (289), 286 states have internal predecessors, (289), 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) [2024-11-08 18:23:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2024-11-08 18:23:05,131 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 282 [2024-11-08 18:23:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:23:05,132 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2024-11-08 18:23:05,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.791946308724832) internal successors, (565), 149 states have internal predecessors, (565), 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) [2024-11-08 18:23:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2024-11-08 18:23:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2024-11-08 18:23:05,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:23:05,134 INFO L215 NwaCegarLoop]: trace histogram [35, 35, 35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:23:05,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-08 18:23:05,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-08 18:23:05,335 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:23:05,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:23:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1858888716, now seen corresponding path program 38 times [2024-11-08 18:23:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:23:05,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388401889] [2024-11-08 18:23:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:23:05,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:23:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:23:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4727 backedges. 2211 proven. 2516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:14,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:23:14,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388401889] [2024-11-08 18:23:14,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388401889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:23:14,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609634698] [2024-11-08 18:23:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:23:14,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:14,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:23:14,099 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:23:14,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-08 18:23:14,521 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:23:14,521 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:23:14,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 325 conjuncts are in the unsatisfiable core [2024-11-08 18:23:14,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:23:14,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:23:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4727 backedges. 2346 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:17,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:23:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4727 backedges. 2346 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:26,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609634698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:23:26,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:23:26,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 188 [2024-11-08 18:23:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631095263] [2024-11-08 18:23:26,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:23:26,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2024-11-08 18:23:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:23:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2024-11-08 18:23:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4695, Invalid=30837, Unknown=0, NotChecked=0, Total=35532 [2024-11-08 18:23:26,628 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand has 189 states, 188 states have (on average 3.797872340425532) internal successors, (714), 189 states have internal predecessors, (714), 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) [2024-11-08 18:23:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:23:35,528 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2024-11-08 18:23:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-11-08 18:23:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 188 states have (on average 3.797872340425532) internal successors, (714), 189 states have internal predecessors, (714), 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 286 [2024-11-08 18:23:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:23:35,530 INFO L225 Difference]: With dead ends: 293 [2024-11-08 18:23:35,530 INFO L226 Difference]: Without dead ends: 293 [2024-11-08 18:23:35,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17426 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5538, Invalid=44414, Unknown=0, NotChecked=0, Total=49952 [2024-11-08 18:23:35,534 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 10181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 10181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-08 18:23:35,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 3118 Invalid, 10181 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 10181 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-08 18:23:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-08 18:23:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2024-11-08 18:23:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 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) [2024-11-08 18:23:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2024-11-08 18:23:35,539 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 286 [2024-11-08 18:23:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:23:35,539 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2024-11-08 18:23:35,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 188 states have (on average 3.797872340425532) internal successors, (714), 189 states have internal predecessors, (714), 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) [2024-11-08 18:23:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2024-11-08 18:23:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2024-11-08 18:23:35,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:23:35,541 INFO L215 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:23:35,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-08 18:23:35,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-08 18:23:35,742 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:23:35,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:23:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1431730298, now seen corresponding path program 39 times [2024-11-08 18:23:35,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:23:35,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023318153] [2024-11-08 18:23:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:23:35,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:23:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:23:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 70 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:23:40,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:23:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023318153] [2024-11-08 18:23:40,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023318153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:23:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658371686] [2024-11-08 18:23:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:23:40,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:40,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:23:40,206 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:23:40,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-08 18:24:40,595 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2024-11-08 18:24:40,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:24:40,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-11-08 18:24:40,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:24:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 70 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:24:41,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:24:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 70 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:24:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658371686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:24:49,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:24:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 153 [2024-11-08 18:24:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000512784] [2024-11-08 18:24:49,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:24:49,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2024-11-08 18:24:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:24:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2024-11-08 18:24:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=22862, Unknown=0, NotChecked=0, Total=23256 [2024-11-08 18:24:49,898 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand has 153 states, 153 states have (on average 3.7973856209150325) internal successors, (581), 153 states have internal predecessors, (581), 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) [2024-11-08 18:25:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:25:02,092 INFO L93 Difference]: Finished difference Result 440 states and 442 transitions. [2024-11-08 18:25:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-08 18:25:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 3.7973856209150325) internal successors, (581), 153 states have internal predecessors, (581), 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 290 [2024-11-08 18:25:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:25:02,093 INFO L225 Difference]: With dead ends: 440 [2024-11-08 18:25:02,093 INFO L226 Difference]: Without dead ends: 298 [2024-11-08 18:25:02,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=564, Invalid=34218, Unknown=0, NotChecked=0, Total=34782 [2024-11-08 18:25:02,095 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 76 mSDsluCounter, 11771 mSDsCounter, 0 mSdLazyCounter, 19936 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 11882 SdHoareTripleChecker+Invalid, 19972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 19936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-08 18:25:02,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 11882 Invalid, 19972 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 19936 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-11-08 18:25:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-08 18:25:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2024-11-08 18:25:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 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) [2024-11-08 18:25:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2024-11-08 18:25:02,100 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 290 [2024-11-08 18:25:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:25:02,100 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2024-11-08 18:25:02,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 3.7973856209150325) internal successors, (581), 153 states have internal predecessors, (581), 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) [2024-11-08 18:25:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2024-11-08 18:25:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2024-11-08 18:25:02,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:25:02,102 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:25:02,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-08 18:25:02,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-08 18:25:02,303 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:25:02,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:25:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1782054706, now seen corresponding path program 40 times [2024-11-08 18:25:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:25:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077987046] [2024-11-08 18:25:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:25:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:25:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 2346 proven. 2660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:25:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:25:09,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077987046] [2024-11-08 18:25:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077987046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:25:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272718294] [2024-11-08 18:25:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:25:09,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:09,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:25:09,791 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:25:09,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-08 18:25:11,415 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:25:11,415 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:25:11,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 338 conjuncts are in the unsatisfiable core [2024-11-08 18:25:11,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:25:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 2485 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:25:14,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:25:18,634 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 22 treesize of output 18 [2024-11-08 18:25:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5006 backedges. 2485 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:25:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272718294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:25:22,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:25:22,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 191 [2024-11-08 18:25:22,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550401333] [2024-11-08 18:25:22,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:25:22,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-11-08 18:25:22,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:25:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-11-08 18:25:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4980, Invalid=31692, Unknown=0, NotChecked=0, Total=36672 [2024-11-08 18:25:22,688 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 192 states, 191 states have (on average 3.842931937172775) internal successors, (734), 192 states have internal predecessors, (734), 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) [2024-11-08 18:25:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 18:25:31,949 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2024-11-08 18:25:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-08 18:25:31,950 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 3.842931937172775) internal successors, (734), 192 states have internal predecessors, (734), 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 294 [2024-11-08 18:25:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 18:25:31,951 INFO L225 Difference]: With dead ends: 301 [2024-11-08 18:25:31,951 INFO L226 Difference]: Without dead ends: 301 [2024-11-08 18:25:31,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18120 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=5863, Invalid=45893, Unknown=0, NotChecked=0, Total=51756 [2024-11-08 18:25:31,954 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 6 mSDsluCounter, 3882 mSDsCounter, 0 mSdLazyCounter, 12089 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3959 SdHoareTripleChecker+Invalid, 12089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-08 18:25:31,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3959 Invalid, 12089 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 12089 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-08 18:25:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-08 18:25:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2024-11-08 18:25:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0100671140939597) internal successors, (301), 298 states have internal predecessors, (301), 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) [2024-11-08 18:25:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 301 transitions. [2024-11-08 18:25:31,958 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 301 transitions. Word has length 294 [2024-11-08 18:25:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 18:25:31,959 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 301 transitions. [2024-11-08 18:25:31,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 3.842931937172775) internal successors, (734), 192 states have internal predecessors, (734), 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) [2024-11-08 18:25:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 301 transitions. [2024-11-08 18:25:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2024-11-08 18:25:31,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 18:25:31,961 INFO L215 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:25:31,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-08 18:25:32,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:32,162 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-11-08 18:25:32,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:25:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2099573576, now seen corresponding path program 41 times [2024-11-08 18:25:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:25:32,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612573355] [2024-11-08 18:25:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:25:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:25:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 72 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:25:36,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:25:36,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612573355] [2024-11-08 18:25:36,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612573355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:25:36,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779731150] [2024-11-08 18:25:36,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:25:36,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:36,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:25:36,902 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:25:36,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6ba0353-2a3a-423a-9fed-b8fe86dbb499/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process