./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:58:42,177 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:42,252 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:58:42,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:42,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:42,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:42,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:42,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:42,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:42,316 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:42,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:42,317 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:42,317 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:42,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:42,320 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:42,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:42,320 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:42,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:42,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:42,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:42,322 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:58:42,323 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:58:42,323 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:58:42,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:42,324 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:58:42,324 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:58:42,325 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:42,325 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:42,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:42,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:42,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:42,343 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:42,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:42,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:42,344 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:42,344 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:42,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:42,345 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:42,345 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:42,345 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:42,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:42,346 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_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2023-11-24 21:58:42,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:42,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:42,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:42,669 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:42,670 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:42,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2023-11-24 21:58:45,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:58:46,037 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:58:46,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2023-11-24 21:58:46,052 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/data/ca9d29174/476b0cd863a34ffa8fc9c441a1fd3102/FLAG43f771432 [2023-11-24 21:58:46,067 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/data/ca9d29174/476b0cd863a34ffa8fc9c441a1fd3102 [2023-11-24 21:58:46,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:58:46,071 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:58:46,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:46,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:58:46,078 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:58:46,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e671c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46, skipping insertion in model container [2023-11-24 21:58:46,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,123 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:58:46,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:46,396 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:58:46,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:46,471 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:58:46,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46 WrapperNode [2023-11-24 21:58:46,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:46,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:46,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:58:46,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:58:46,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,545 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2023-11-24 21:58:46,546 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:46,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:58:46,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:58:46,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:58:46,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,577 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,592 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2023-11-24 21:58:46,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:58:46,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:58:46,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:58:46,612 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:58:46,613 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (1/1) ... [2023-11-24 21:58:46,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:46,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:58:46,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:58:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:58:46,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:58:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:58:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:58:46,821 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:58:46,823 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:58:47,133 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:58:47,185 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:58:47,185 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:58:47,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:47 BoogieIcfgContainer [2023-11-24 21:58:47,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:58:47,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:58:47,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:58:47,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:58:47,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:58:46" (1/3) ... [2023-11-24 21:58:47,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdb93b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:47, skipping insertion in model container [2023-11-24 21:58:47,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:46" (2/3) ... [2023-11-24 21:58:47,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdb93b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:47, skipping insertion in model container [2023-11-24 21:58:47,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:47" (3/3) ... [2023-11-24 21:58:47,199 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2023-11-24 21:58:47,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:58:47,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-11-24 21:58:47,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:47,290 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71b799b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:47,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-24 21:58:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 2.2) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:58:47,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:47,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:58:47,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:47,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash -453700603, now seen corresponding path program 1 times [2023-11-24 21:58:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:47,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387735132] [2023-11-24 21:58:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387735132] [2023-11-24 21:58:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387735132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:47,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:47,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:47,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93992840] [2023-11-24 21:58:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:47,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:47,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:47,688 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 2.2) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:47,814 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2023-11-24 21:58:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:58:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:47,828 INFO L225 Difference]: With dead ends: 62 [2023-11-24 21:58:47,828 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 21:58:47,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:47,836 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:47,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 21:58:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2023-11-24 21:58:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.826086956521739) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-24 21:58:47,904 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 6 [2023-11-24 21:58:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:47,905 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-24 21:58:47,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-24 21:58:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:58:47,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:47,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:58:47,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:47,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:47,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash -451853561, now seen corresponding path program 1 times [2023-11-24 21:58:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:47,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58970522] [2023-11-24 21:58:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:47,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:48,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:48,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58970522] [2023-11-24 21:58:48,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58970522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:48,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:48,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680383630] [2023-11-24 21:58:48,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:48,600 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:48,706 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2023-11-24 21:58:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:48,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:58:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:48,708 INFO L225 Difference]: With dead ends: 64 [2023-11-24 21:58:48,708 INFO L226 Difference]: Without dead ends: 64 [2023-11-24 21:58:48,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:48,710 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:48,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 38 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-24 21:58:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 34. [2023-11-24 21:58:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-24 21:58:48,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 6 [2023-11-24 21:58:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:48,719 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-24 21:58:48,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-24 21:58:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:58:48,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:48,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:58:48,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:58:48,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:48,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash -451853560, now seen corresponding path program 1 times [2023-11-24 21:58:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926743006] [2023-11-24 21:58:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:49,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:49,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926743006] [2023-11-24 21:58:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926743006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:49,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:49,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775981264] [2023-11-24 21:58:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:49,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:49,020 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:49,163 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-11-24 21:58:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-24 21:58:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:49,167 INFO L225 Difference]: With dead ends: 37 [2023-11-24 21:58:49,167 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 21:58:49,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:49,174 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:49,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 21:58:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-24 21:58:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.72) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-11-24 21:58:49,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 6 [2023-11-24 21:58:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:49,192 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-11-24 21:58:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-11-24 21:58:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:58:49,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:49,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:49,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:58:49,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:49,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2080334129, now seen corresponding path program 1 times [2023-11-24 21:58:49,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:49,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825029543] [2023-11-24 21:58:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:49,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825029543] [2023-11-24 21:58:49,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825029543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:49,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:49,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045788073] [2023-11-24 21:58:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:49,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:49,264 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:49,322 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2023-11-24 21:58:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:58:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:49,324 INFO L225 Difference]: With dead ends: 65 [2023-11-24 21:58:49,325 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 21:58:49,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:49,326 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:49,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 72 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 21:58:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2023-11-24 21:58:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-11-24 21:58:49,333 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 8 [2023-11-24 21:58:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:49,334 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-11-24 21:58:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-11-24 21:58:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:58:49,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:49,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:58:49,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:49,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2137592431, now seen corresponding path program 1 times [2023-11-24 21:58:49,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:49,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503747787] [2023-11-24 21:58:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:49,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:49,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:49,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503747787] [2023-11-24 21:58:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503747787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:49,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336998668] [2023-11-24 21:58:49,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:49,427 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. 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) [2023-11-24 21:58:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:49,471 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-11-24 21:58:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:49,471 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 [2023-11-24 21:58:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:49,472 INFO L225 Difference]: With dead ends: 43 [2023-11-24 21:58:49,472 INFO L226 Difference]: Without dead ends: 43 [2023-11-24 21:58:49,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:49,474 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:49,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-24 21:58:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-24 21:58:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-11-24 21:58:49,489 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 8 [2023-11-24 21:58:49,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:49,489 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-11-24 21:58:49,489 INFO L496 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) [2023-11-24 21:58:49,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-11-24 21:58:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:58:49,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:49,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:49,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:58:49,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:49,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2137592432, now seen corresponding path program 1 times [2023-11-24 21:58:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:49,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796072966] [2023-11-24 21:58:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:49,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:49,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:49,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796072966] [2023-11-24 21:58:49,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796072966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:49,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:49,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900082408] [2023-11-24 21:58:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:49,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:58:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:58:49,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:49,699 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:49,793 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-11-24 21:58:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:58:49,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:58:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:49,798 INFO L225 Difference]: With dead ends: 46 [2023-11-24 21:58:49,799 INFO L226 Difference]: Without dead ends: 46 [2023-11-24 21:58:49,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:58:49,801 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:49,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-24 21:58:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-24 21:58:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-24 21:58:49,823 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 8 [2023-11-24 21:58:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-24 21:58:49,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-11-24 21:58:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:58:49,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:49,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:58:49,825 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:49,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash -439496645, now seen corresponding path program 1 times [2023-11-24 21:58:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:49,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419741814] [2023-11-24 21:58:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419741814] [2023-11-24 21:58:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419741814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071506894] [2023-11-24 21:58:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:50,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:50,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:50,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:58:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:50,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:58:50,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:58:50,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:58:50,349 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 10 treesize of output 8 [2023-11-24 21:58:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:50,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:50,720 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:58:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:50,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071506894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:50,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:50,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-24 21:58:50,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61183217] [2023-11-24 21:58:50,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:50,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:58:50,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:58:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:58:50,766 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) 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) [2023-11-24 21:58:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:51,002 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-11-24 21:58:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:58:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) 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 8 [2023-11-24 21:58:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:51,003 INFO L225 Difference]: With dead ends: 50 [2023-11-24 21:58:51,004 INFO L226 Difference]: Without dead ends: 50 [2023-11-24 21:58:51,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:58:51,005 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:51,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 82 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-24 21:58:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2023-11-24 21:58:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.5) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-11-24 21:58:51,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 8 [2023-11-24 21:58:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:51,010 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-11-24 21:58:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) 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) [2023-11-24 21:58:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-11-24 21:58:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:58:51,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:51,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:51,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:51,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:51,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:51,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash 65846939, now seen corresponding path program 1 times [2023-11-24 21:58:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:51,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135230670] [2023-11-24 21:58:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:51,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:51,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135230670] [2023-11-24 21:58:51,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135230670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:51,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:51,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986748153] [2023-11-24 21:58:51,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:51,352 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:51,401 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-11-24 21:58:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:51,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 21:58:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:51,403 INFO L225 Difference]: With dead ends: 65 [2023-11-24 21:58:51,403 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 21:58:51,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:51,406 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 42 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 [2023-11-24 21:58:51,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 21:58:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2023-11-24 21:58:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-11-24 21:58:51,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 9 [2023-11-24 21:58:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:51,415 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-11-24 21:58:51,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-11-24 21:58:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:58:51,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:51,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:51,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:58:51,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:51,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -743499687, now seen corresponding path program 1 times [2023-11-24 21:58:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:51,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054355712] [2023-11-24 21:58:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:51,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:51,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054355712] [2023-11-24 21:58:51,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054355712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:51,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:51,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:51,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926382335] [2023-11-24 21:58:51,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:51,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:51,619 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:51,658 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-11-24 21:58:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 21:58:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:51,661 INFO L225 Difference]: With dead ends: 48 [2023-11-24 21:58:51,662 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 21:58:51,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:51,665 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:51,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 21:58:51,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2023-11-24 21:58:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.46875) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-24 21:58:51,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 9 [2023-11-24 21:58:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:51,675 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-24 21:58:51,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-24 21:58:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:58:51,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:51,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:51,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:58:51,677 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:51,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2041255104, now seen corresponding path program 1 times [2023-11-24 21:58:51,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:51,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369263182] [2023-11-24 21:58:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:51,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:51,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:51,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369263182] [2023-11-24 21:58:51,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369263182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:51,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:51,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207550004] [2023-11-24 21:58:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:51,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:51,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:51,785 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:51,831 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-11-24 21:58:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:51,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-24 21:58:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:51,832 INFO L225 Difference]: With dead ends: 55 [2023-11-24 21:58:51,833 INFO L226 Difference]: Without dead ends: 55 [2023-11-24 21:58:51,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:51,833 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:51,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-24 21:58:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2023-11-24 21:58:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-11-24 21:58:51,850 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 10 [2023-11-24 21:58:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:51,850 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-11-24 21:58:51,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-11-24 21:58:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:58:51,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:51,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:58:51,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:51,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1231908478, now seen corresponding path program 1 times [2023-11-24 21:58:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670379453] [2023-11-24 21:58:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670379453] [2023-11-24 21:58:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670379453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:51,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:51,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344508260] [2023-11-24 21:58:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:51,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:51,979 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:52,008 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-11-24 21:58:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-24 21:58:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:52,009 INFO L225 Difference]: With dead ends: 41 [2023-11-24 21:58:52,009 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:58:52,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:52,010 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:52,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:58:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-11-24 21:58:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.4375) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-11-24 21:58:52,015 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 10 [2023-11-24 21:58:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:52,015 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-11-24 21:58:52,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-11-24 21:58:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:58:52,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:52,017 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:52,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:58:52,018 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:52,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1232022483, now seen corresponding path program 1 times [2023-11-24 21:58:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970401651] [2023-11-24 21:58:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:52,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970401651] [2023-11-24 21:58:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970401651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998846270] [2023-11-24 21:58:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:52,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:52,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:52,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:58:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:52,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:58:52,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:52,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:58:52,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:58:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:52,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998846270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:52,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-24 21:58:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411491018] [2023-11-24 21:58:52,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:58:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:58:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:58:52,778 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:53,010 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-11-24 21:58:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:58:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 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 10 [2023-11-24 21:58:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:53,011 INFO L225 Difference]: With dead ends: 40 [2023-11-24 21:58:53,012 INFO L226 Difference]: Without dead ends: 40 [2023-11-24 21:58:53,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:58:53,013 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:53,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 92 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-24 21:58:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-11-24 21:58:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-24 21:58:53,015 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 10 [2023-11-24 21:58:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:53,015 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-24 21:58:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-24 21:58:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:58:53,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:53,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:53,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:53,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:53,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:53,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1153849164, now seen corresponding path program 1 times [2023-11-24 21:58:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:53,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409586851] [2023-11-24 21:58:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:53,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:53,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409586851] [2023-11-24 21:58:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409586851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:53,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136385565] [2023-11-24 21:58:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:53,284 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 4 states have (on average 3.0) 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) [2023-11-24 21:58:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:53,333 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-11-24 21:58:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) 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 [2023-11-24 21:58:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:53,334 INFO L225 Difference]: With dead ends: 34 [2023-11-24 21:58:53,334 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:58:53,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:58:53,335 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:53,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:58:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-24 21:58:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 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) [2023-11-24 21:58:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-11-24 21:58:53,338 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 12 [2023-11-24 21:58:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:53,338 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-11-24 21:58:53,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) 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) [2023-11-24 21:58:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-11-24 21:58:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:58:53,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:53,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:53,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:58:53,339 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:53,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1153849163, now seen corresponding path program 1 times [2023-11-24 21:58:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950447260] [2023-11-24 21:58:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:53,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:53,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950447260] [2023-11-24 21:58:53,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950447260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:53,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:53,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:58:53,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372455017] [2023-11-24 21:58:53,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:53,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:58:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:58:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:58:53,472 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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) [2023-11-24 21:58:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:53,577 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-11-24 21:58:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:58:53,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 [2023-11-24 21:58:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:53,579 INFO L225 Difference]: With dead ends: 47 [2023-11-24 21:58:53,579 INFO L226 Difference]: Without dead ends: 47 [2023-11-24 21:58:53,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:58:53,580 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:53,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 67 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-24 21:58:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-11-24 21:58:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-11-24 21:58:53,583 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 12 [2023-11-24 21:58:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:53,583 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-11-24 21:58:53,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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) [2023-11-24 21:58:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-11-24 21:58:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:58:53,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:53,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:53,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:58:53,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:53,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash -747449192, now seen corresponding path program 1 times [2023-11-24 21:58:53,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:53,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930847850] [2023-11-24 21:58:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:53,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:53,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:53,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930847850] [2023-11-24 21:58:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930847850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:53,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:53,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390175804] [2023-11-24 21:58:53,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:53,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:53,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:53,769 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2023-11-24 21:58:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:53,817 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2023-11-24 21:58:53,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:53,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2023-11-24 21:58:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:53,818 INFO L225 Difference]: With dead ends: 35 [2023-11-24 21:58:53,818 INFO L226 Difference]: Without dead ends: 35 [2023-11-24 21:58:53,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:58:53,819 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:53,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-24 21:58:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-24 21:58:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-24 21:58:53,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 14 [2023-11-24 21:58:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:53,822 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-24 21:58:53,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2023-11-24 21:58:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-24 21:58:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:58:53,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:53,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:53,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:58:53,824 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:53,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash -747449191, now seen corresponding path program 1 times [2023-11-24 21:58:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463449052] [2023-11-24 21:58:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:53,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463449052] [2023-11-24 21:58:53,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463449052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:53,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:58:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235592253] [2023-11-24 21:58:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:53,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:58:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:58:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:58:53,992 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 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) [2023-11-24 21:58:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:54,094 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-11-24 21:58:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:58:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 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 [2023-11-24 21:58:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:54,096 INFO L225 Difference]: With dead ends: 38 [2023-11-24 21:58:54,096 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 21:58:54,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:58:54,097 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:54,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 21:58:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-24 21:58:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-11-24 21:58:54,100 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 14 [2023-11-24 21:58:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:54,100 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-11-24 21:58:54,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 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) [2023-11-24 21:58:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-11-24 21:58:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:58:54,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:54,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:58:54,102 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:54,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2147352390, now seen corresponding path program 1 times [2023-11-24 21:58:54,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:54,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957869812] [2023-11-24 21:58:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:54,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957869812] [2023-11-24 21:58:54,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957869812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:54,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:54,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:54,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806824332] [2023-11-24 21:58:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:54,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:54,253 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:54,275 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-24 21:58:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:58:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:54,277 INFO L225 Difference]: With dead ends: 36 [2023-11-24 21:58:54,277 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:58:54,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:54,278 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:54,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:58:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-24 21:58:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.28125) internal successors, (41), 33 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) [2023-11-24 21:58:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-11-24 21:58:54,281 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2023-11-24 21:58:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:54,281 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-11-24 21:58:54,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-11-24 21:58:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:58:54,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:54,282 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:54,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:58:54,283 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:54,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:54,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2143364640, now seen corresponding path program 1 times [2023-11-24 21:58:54,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101940530] [2023-11-24 21:58:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:54,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101940530] [2023-11-24 21:58:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101940530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:54,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:58:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204095505] [2023-11-24 21:58:54,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:58:54,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:58:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:58:54,519 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:54,671 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-11-24 21:58:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:58:54,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:58:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:54,672 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:58:54,672 INFO L226 Difference]: Without dead ends: 51 [2023-11-24 21:58:54,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:58:54,674 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:54,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-24 21:58:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-11-24 21:58:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-11-24 21:58:54,677 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 18 [2023-11-24 21:58:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:54,677 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-11-24 21:58:54,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-11-24 21:58:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:58:54,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:54,678 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:54,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:58:54,679 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:54,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2143362462, now seen corresponding path program 1 times [2023-11-24 21:58:54,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:54,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452114605] [2023-11-24 21:58:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:54,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:54,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452114605] [2023-11-24 21:58:54,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452114605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:54,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:54,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:58:54,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649988799] [2023-11-24 21:58:54,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:54,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:58:54,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:58:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:58:54,904 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:55,059 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-11-24 21:58:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:58:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:58:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:55,061 INFO L225 Difference]: With dead ends: 75 [2023-11-24 21:58:55,061 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 21:58:55,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:58:55,062 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:55,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 91 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 21:58:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-11-24 21:58:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-11-24 21:58:55,065 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 18 [2023-11-24 21:58:55,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:55,065 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-11-24 21:58:55,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-11-24 21:58:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:58:55,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:55,066 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:58:55,067 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:55,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1130536480, now seen corresponding path program 1 times [2023-11-24 21:58:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398549914] [2023-11-24 21:58:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:55,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:55,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398549914] [2023-11-24 21:58:55,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398549914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:55,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:55,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:58:55,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775803937] [2023-11-24 21:58:55,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:58:55,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:58:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:58:55,326 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:55,500 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-11-24 21:58:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:58:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:58:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:55,502 INFO L225 Difference]: With dead ends: 88 [2023-11-24 21:58:55,502 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:58:55,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:58:55,503 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:55,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:58:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2023-11-24 21:58:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2023-11-24 21:58:55,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 18 [2023-11-24 21:58:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:55,507 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2023-11-24 21:58:55,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2023-11-24 21:58:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:58:55,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:55,509 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:58:55,509 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:55,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 563254754, now seen corresponding path program 1 times [2023-11-24 21:58:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470454136] [2023-11-24 21:58:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:55,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470454136] [2023-11-24 21:58:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470454136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:55,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:55,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:58:55,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629061298] [2023-11-24 21:58:55,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:55,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:58:55,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:55,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:58:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:58:55,765 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:55,940 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2023-11-24 21:58:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:58:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:58:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:55,942 INFO L225 Difference]: With dead ends: 90 [2023-11-24 21:58:55,942 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:58:55,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:58:55,943 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:55,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 91 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:58:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2023-11-24 21:58:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2023-11-24 21:58:55,947 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 18 [2023-11-24 21:58:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:55,947 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2023-11-24 21:58:55,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2023-11-24 21:58:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:58:55,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:55,948 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:58:55,948 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:55,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1479632957, now seen corresponding path program 1 times [2023-11-24 21:58:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181091104] [2023-11-24 21:58:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:56,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181091104] [2023-11-24 21:58:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181091104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093609012] [2023-11-24 21:58:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:56,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:58:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:56,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 21:58:56,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:56,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:56,688 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 5 treesize of output 3 [2023-11-24 21:58:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:56,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093609012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:56,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:56,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2023-11-24 21:58:56,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447241978] [2023-11-24 21:58:56,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:56,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:58:56,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:56,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:58:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:58:56,724 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:57,095 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2023-11-24 21:58:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:58:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 21:58:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:57,097 INFO L225 Difference]: With dead ends: 77 [2023-11-24 21:58:57,097 INFO L226 Difference]: Without dead ends: 77 [2023-11-24 21:58:57,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:58:57,098 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:57,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 183 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:58:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-24 21:58:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2023-11-24 21:58:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 1.208955223880597) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-11-24 21:58:57,101 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 20 [2023-11-24 21:58:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:57,101 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-11-24 21:58:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-11-24 21:58:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:58:57,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:57,102 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:57,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:57,303 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:57,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1761743211, now seen corresponding path program 1 times [2023-11-24 21:58:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:57,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45496243] [2023-11-24 21:58:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:57,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:57,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45496243] [2023-11-24 21:58:57,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45496243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964888929] [2023-11-24 21:58:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:57,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:57,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:57,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:58:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:57,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 21:58:57,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:57,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:58,017 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 5 treesize of output 3 [2023-11-24 21:58:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:58,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964888929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:58,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-24 21:58:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132519666] [2023-11-24 21:58:58,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:58,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:58:58,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:58:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:58:58,053 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 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) [2023-11-24 21:58:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:58,344 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2023-11-24 21:58:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:58:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 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) Word has length 20 [2023-11-24 21:58:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:58,345 INFO L225 Difference]: With dead ends: 91 [2023-11-24 21:58:58,345 INFO L226 Difference]: Without dead ends: 91 [2023-11-24 21:58:58,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:58:58,346 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:58,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 188 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:58:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-24 21:58:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2023-11-24 21:58:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.2) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2023-11-24 21:58:58,350 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 20 [2023-11-24 21:58:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:58,350 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2023-11-24 21:58:58,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 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) [2023-11-24 21:58:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2023-11-24 21:58:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:58:58,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:58,351 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:58,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:58:58,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:58,552 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:58:58,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1834025100, now seen corresponding path program 2 times [2023-11-24 21:58:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:58,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139454048] [2023-11-24 21:58:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:58,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139454048] [2023-11-24 21:58:59,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139454048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830387317] [2023-11-24 21:58:59,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:58:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:59,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:59,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:59,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:58:59,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:58:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:58:59,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-24 21:58:59,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:59,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-24 21:58:59,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:58:59,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-24 21:58:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:59,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:00,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:59:00,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 21:59:00,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-24 21:59:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:00,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830387317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:00,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:00,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2023-11-24 21:59:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281887625] [2023-11-24 21:59:00,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:59:00,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:00,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:59:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:59:00,420 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:08,839 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2023-11-24 21:59:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-24 21:59:08,840 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 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 24 [2023-11-24 21:59:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:08,842 INFO L225 Difference]: With dead ends: 161 [2023-11-24 21:59:08,842 INFO L226 Difference]: Without dead ends: 148 [2023-11-24 21:59:08,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=621, Invalid=3539, Unknown=0, NotChecked=0, Total=4160 [2023-11-24 21:59:08,845 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:08,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 321 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:59:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-24 21:59:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 128. [2023-11-24 21:59:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 149 transitions. [2023-11-24 21:59:08,852 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 149 transitions. Word has length 24 [2023-11-24 21:59:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:08,853 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 149 transitions. [2023-11-24 21:59:08,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 149 transitions. [2023-11-24 21:59:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:59:08,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:08,854 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:08,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:09,061 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:59:09,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash -798017600, now seen corresponding path program 2 times [2023-11-24 21:59:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37043029] [2023-11-24 21:59:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:09,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37043029] [2023-11-24 21:59:09,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37043029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566172670] [2023-11-24 21:59:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:59:09,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:09,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:59:09,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:59:09,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:09,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 21:59:09,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:09,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:59:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:10,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:10,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:59:10,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-24 21:59:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:10,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566172670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:10,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-11-24 21:59:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68025812] [2023-11-24 21:59:10,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 21:59:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 21:59:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:59:10,632 INFO L87 Difference]: Start difference. First operand 128 states and 149 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:11,204 INFO L93 Difference]: Finished difference Result 217 states and 245 transitions. [2023-11-24 21:59:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:59:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 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 26 [2023-11-24 21:59:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:11,206 INFO L225 Difference]: With dead ends: 217 [2023-11-24 21:59:11,206 INFO L226 Difference]: Without dead ends: 177 [2023-11-24 21:59:11,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:59:11,208 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:11,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 290 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:59:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-24 21:59:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2023-11-24 21:59:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.1870967741935483) internal successors, (184), 156 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2023-11-24 21:59:11,213 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 26 [2023-11-24 21:59:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:11,214 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2023-11-24 21:59:11,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2023-11-24 21:59:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:59:11,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:11,215 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:11,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-24 21:59:11,421 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:59:11,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -589550221, now seen corresponding path program 3 times [2023-11-24 21:59:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012814801] [2023-11-24 21:59:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:11,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:11,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012814801] [2023-11-24 21:59:11,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012814801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:11,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74308952] [2023-11-24 21:59:11,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:59:11,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:11,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:11,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:59:11,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:59:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:11,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-24 21:59:11,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:12,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:12,366 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 5 treesize of output 3 [2023-11-24 21:59:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:12,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74308952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:12,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:12,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-24 21:59:12,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119377060] [2023-11-24 21:59:12,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:12,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:59:12,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:59:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:59:12,435 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 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) [2023-11-24 21:59:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:12,925 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2023-11-24 21:59:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:59:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 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) Word has length 28 [2023-11-24 21:59:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:12,927 INFO L225 Difference]: With dead ends: 192 [2023-11-24 21:59:12,927 INFO L226 Difference]: Without dead ends: 192 [2023-11-24 21:59:12,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:59:12,928 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 127 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:12,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 340 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:59:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-24 21:59:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2023-11-24 21:59:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.1818181818181819) internal successors, (221), 188 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) [2023-11-24 21:59:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 221 transitions. [2023-11-24 21:59:12,935 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 221 transitions. Word has length 28 [2023-11-24 21:59:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:12,935 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 221 transitions. [2023-11-24 21:59:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 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) [2023-11-24 21:59:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 221 transitions. [2023-11-24 21:59:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 21:59:12,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:12,936 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:12,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:13,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 21:59:13,142 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:59:13,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1063885128, now seen corresponding path program 3 times [2023-11-24 21:59:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:13,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998423721] [2023-11-24 21:59:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:13,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998423721] [2023-11-24 21:59:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998423721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892294738] [2023-11-24 21:59:13,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:59:13,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:13,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:13,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:13,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:59:13,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:59:13,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:13,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-24 21:59:13,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:13,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:59:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:13,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:13,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:59:13,939 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 16 treesize of output 12 [2023-11-24 21:59:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:14,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892294738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:14,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 24 [2023-11-24 21:59:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544434382] [2023-11-24 21:59:14,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 21:59:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 21:59:14,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:59:14,025 INFO L87 Difference]: Start difference. First operand 189 states and 221 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:14,735 INFO L93 Difference]: Finished difference Result 306 states and 348 transitions. [2023-11-24 21:59:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 21:59:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-24 21:59:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:14,737 INFO L225 Difference]: With dead ends: 306 [2023-11-24 21:59:14,737 INFO L226 Difference]: Without dead ends: 264 [2023-11-24 21:59:14,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:59:14,739 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 125 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:14,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 350 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:59:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-24 21:59:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 242. [2023-11-24 21:59:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 1.175) internal successors, (282), 241 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 282 transitions. [2023-11-24 21:59:14,747 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 282 transitions. Word has length 30 [2023-11-24 21:59:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:14,747 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 282 transitions. [2023-11-24 21:59:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 282 transitions. [2023-11-24 21:59:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:59:14,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:14,749 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:14,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 21:59:14,955 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:59:14,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:14,955 INFO L85 PathProgramCache]: Analyzing trace with hash 725746651, now seen corresponding path program 4 times [2023-11-24 21:59:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:14,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001749999] [2023-11-24 21:59:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001749999] [2023-11-24 21:59:15,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001749999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308183670] [2023-11-24 21:59:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:59:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:15,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:15,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:59:15,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:59:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:15,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-24 21:59:15,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:15,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-24 21:59:16,501 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-24 21:59:16,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2023-11-24 21:59:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:59:16,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:17,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-11-24 21:59:17,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2023-11-24 21:59:17,636 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 5 treesize of output 3 [2023-11-24 21:59:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:59:17,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308183670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:17,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:17,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2023-11-24 21:59:17,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264501479] [2023-11-24 21:59:17,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:17,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-24 21:59:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-24 21:59:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2023-11-24 21:59:17,673 INFO L87 Difference]: Start difference. First operand 242 states and 282 transitions. Second operand has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:27,454 INFO L93 Difference]: Finished difference Result 301 states and 341 transitions. [2023-11-24 21:59:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-24 21:59:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 32 [2023-11-24 21:59:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:27,456 INFO L225 Difference]: With dead ends: 301 [2023-11-24 21:59:27,456 INFO L226 Difference]: Without dead ends: 232 [2023-11-24 21:59:27,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=882, Invalid=4230, Unknown=0, NotChecked=0, Total=5112 [2023-11-24 21:59:27,459 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:27,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 244 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:59:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-24 21:59:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 154. [2023-11-24 21:59:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 153 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2023-11-24 21:59:27,465 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 32 [2023-11-24 21:59:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,465 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2023-11-24 21:59:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2023-11-24 21:59:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 21:59:27,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,467 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:27,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:27,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-24 21:59:27,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-24 21:59:27,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1506695198, now seen corresponding path program 4 times [2023-11-24 21:59:27,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042559132] [2023-11-24 21:59:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:28,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042559132] [2023-11-24 21:59:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042559132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645225400] [2023-11-24 21:59:28,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:59:28,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:28,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:28,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d37ebfc8-65f7-48b4-aad0-9b576d69a067/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:59:28,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:59:28,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:28,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-24 21:59:28,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:28,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-24 21:59:29,899 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-24 21:59:29,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2023-11-24 21:59:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:59:30,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:31,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-11-24 21:59:31,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2023-11-24 21:59:31,698 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 5 treesize of output 3 [2023-11-24 21:59:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:59:31,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645225400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:31,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:31,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 50 [2023-11-24 21:59:31,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449358709] [2023-11-24 21:59:31,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:31,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-24 21:59:31,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-24 21:59:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2256, Unknown=0, NotChecked=0, Total=2450 [2023-11-24 21:59:31,737 INFO L87 Difference]: Start difference. First operand 154 states and 176 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)