./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-lst-shared.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-lst-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7ac435f9525efba17674735293ae04d2f777a83ec5e1b38ed3aaaf0148b05726 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:47,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:47,514 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 10:45:47,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:47,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:47,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:47,544 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:47,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:47,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:47,546 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:47,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:47,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:47,548 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:47,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:47,550 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:47,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:47,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:47,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:47,552 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:45:47,552 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:45:47,553 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:45:47,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:47,554 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:45:47,555 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:45:47,555 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:47,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:47,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:47,556 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:47,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:47,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:47,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:47,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:47,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:47,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:47,560 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:47,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:47,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:47,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:47,561 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_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac435f9525efba17674735293ae04d2f777a83ec5e1b38ed3aaaf0148b05726 [2023-11-26 10:45:47,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:47,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:47,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:47,888 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:47,890 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:47,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety-broom/sll-lst-shared.i [2023-11-26 10:45:50,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:51,273 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:51,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/sv-benchmarks/c/memsafety-broom/sll-lst-shared.i [2023-11-26 10:45:51,311 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/data/fb4e58434/28e4f2c1525241e8bbef0b12a7c45d8b/FLAGd47092dab [2023-11-26 10:45:51,329 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/data/fb4e58434/28e4f2c1525241e8bbef0b12a7c45d8b [2023-11-26 10:45:51,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:51,341 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:51,342 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:51,342 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:51,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:51,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:51,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@858e763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51, skipping insertion in model container [2023-11-26 10:45:51,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:51,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:51,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:51,800 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:51,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:51,881 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:51,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51 WrapperNode [2023-11-26 10:45:51,882 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:51,883 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:51,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:51,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:51,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:51,913 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:51,954 INFO L138 Inliner]: procedures = 121, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 75 [2023-11-26 10:45:51,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:51,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:51,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:51,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:51,968 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:51,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:51,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,030 INFO L175 MemorySlicer]: Split 11 memory accesses to 1 slices as follows [11]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 5 writes are split as follows [5]. [2023-11-26 10:45:52,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:52,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:52,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:52,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:52,073 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (1/1) ... [2023-11-26 10:45:52,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:52,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:52,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:45:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-26 10:45:52,162 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-26 10:45:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:45:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:45:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:45:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:45:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:52,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:52,292 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:52,294 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:45:52,591 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:45:52,650 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:45:52,650 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:45:52,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:52 BoogieIcfgContainer [2023-11-26 10:45:52,651 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:45:52,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:45:52,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:45:52,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:45:52,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:51" (1/3) ... [2023-11-26 10:45:52,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e0a50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:52, skipping insertion in model container [2023-11-26 10:45:52,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:51" (2/3) ... [2023-11-26 10:45:52,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e0a50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:52, skipping insertion in model container [2023-11-26 10:45:52,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:52" (3/3) ... [2023-11-26 10:45:52,660 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-lst-shared.i [2023-11-26 10:45:52,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:45:52,680 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2023-11-26 10:45:52,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:52,727 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;@7b28e323, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:52,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-11-26 10:45:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 10:45:52,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:52,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 10:45:52,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:52,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:52,770 INFO L85 PathProgramCache]: Analyzing trace with hash 4876116, now seen corresponding path program 1 times [2023-11-26 10:45:52,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224795122] [2023-11-26 10:45:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:53,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:53,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224795122] [2023-11-26 10:45:53,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224795122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:53,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:53,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939956278] [2023-11-26 10:45:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:53,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:53,169 INFO L87 Difference]: Start difference. First operand has 62 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:53,275 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-11-26 10:45:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 10:45:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:53,286 INFO L225 Difference]: With dead ends: 61 [2023-11-26 10:45:53,286 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 10:45:53,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:53,292 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:53,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 10:45:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-26 10:45:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-11-26 10:45:53,334 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 4 [2023-11-26 10:45:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:53,335 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-11-26 10:45:53,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-11-26 10:45:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 10:45:53,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:53,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 10:45:53,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:45:53,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:53,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash 4876117, now seen corresponding path program 1 times [2023-11-26 10:45:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:53,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707875892] [2023-11-26 10:45:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:53,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707875892] [2023-11-26 10:45:53,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707875892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:53,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:53,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:53,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298757063] [2023-11-26 10:45:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:53,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:53,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:53,484 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:53,550 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-11-26 10:45:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 10:45:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:53,553 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:45:53,553 INFO L226 Difference]: Without dead ends: 59 [2023-11-26 10:45:53,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:53,555 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:53,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-26 10:45:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-26 10:45:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-26 10:45:53,565 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 4 [2023-11-26 10:45:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:53,565 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-26 10:45:53,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-26 10:45:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 10:45:53,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:53,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:45:53,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:53,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash -760919924, now seen corresponding path program 1 times [2023-11-26 10:45:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295671519] [2023-11-26 10:45:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:53,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:53,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:53,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295671519] [2023-11-26 10:45:53,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295671519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:53,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:53,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:53,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237026636] [2023-11-26 10:45:53,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:53,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:53,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:53,711 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:53,856 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-11-26 10:45:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:53,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-26 10:45:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:53,862 INFO L225 Difference]: With dead ends: 62 [2023-11-26 10:45:53,862 INFO L226 Difference]: Without dead ends: 62 [2023-11-26 10:45:53,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:53,872 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:53,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 98 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-26 10:45:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-11-26 10:45:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 29 states have (on average 2.0) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-26 10:45:53,893 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 7 [2023-11-26 10:45:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:53,894 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-26 10:45:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-26 10:45:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 10:45:53,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:53,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:53,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:45:53,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:53,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash -760919923, now seen corresponding path program 1 times [2023-11-26 10:45:53,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:53,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146419851] [2023-11-26 10:45:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:53,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:54,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:54,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146419851] [2023-11-26 10:45:54,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146419851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:54,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:54,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560266851] [2023-11-26 10:45:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:54,041 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:54,155 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-11-26 10:45:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:54,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-11-26 10:45:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:54,159 INFO L225 Difference]: With dead ends: 61 [2023-11-26 10:45:54,159 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 10:45:54,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:54,170 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:54,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 103 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 10:45:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-11-26 10:45:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-11-26 10:45:54,182 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 7 [2023-11-26 10:45:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:54,183 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-11-26 10:45:54,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-11-26 10:45:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:45:54,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:54,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:54,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:45:54,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:54,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:54,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677552, now seen corresponding path program 1 times [2023-11-26 10:45:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:54,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598428658] [2023-11-26 10:45:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598428658] [2023-11-26 10:45:54,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598428658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:54,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:45:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348997930] [2023-11-26 10:45:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:54,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:54,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:54,475 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:54,637 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-26 10:45:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:54,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-26 10:45:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:54,640 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:45:54,640 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:45:54,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:54,641 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:54,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 159 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:45:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-11-26 10:45:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-11-26 10:45:54,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 8 [2023-11-26 10:45:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:54,658 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-11-26 10:45:54,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-11-26 10:45:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:45:54,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:54,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:45:54,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:54,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677551, now seen corresponding path program 1 times [2023-11-26 10:45:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720873406] [2023-11-26 10:45:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:54,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:55,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720873406] [2023-11-26 10:45:55,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720873406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:55,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:55,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:45:55,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926738144] [2023-11-26 10:45:55,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:55,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:55,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:55,081 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:55,266 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-26 10:45:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-26 10:45:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:55,271 INFO L225 Difference]: With dead ends: 57 [2023-11-26 10:45:55,271 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 10:45:55,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:55,278 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:55,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 10:45:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-11-26 10:45:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-26 10:45:55,290 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 8 [2023-11-26 10:45:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:55,291 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-26 10:45:55,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-26 10:45:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:45:55,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:55,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:55,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:45:55,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:55,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762607, now seen corresponding path program 1 times [2023-11-26 10:45:55,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:55,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695754407] [2023-11-26 10:45:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:55,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695754407] [2023-11-26 10:45:55,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695754407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:55,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:55,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:55,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324637158] [2023-11-26 10:45:55,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:55,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:55,435 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:55,602 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-11-26 10:45:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 10:45:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:55,604 INFO L225 Difference]: With dead ends: 74 [2023-11-26 10:45:55,604 INFO L226 Difference]: Without dead ends: 74 [2023-11-26 10:45:55,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:55,605 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:55,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 132 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-26 10:45:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2023-11-26 10:45:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.825) internal successors, (73), 59 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-11-26 10:45:55,624 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 13 [2023-11-26 10:45:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:55,624 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-11-26 10:45:55,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-11-26 10:45:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:45:55,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:55,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:55,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:45:55,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:55,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762608, now seen corresponding path program 1 times [2023-11-26 10:45:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:55,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709973285] [2023-11-26 10:45:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:55,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:55,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709973285] [2023-11-26 10:45:55,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709973285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:55,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:55,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:45:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450773851] [2023-11-26 10:45:55,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:55,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:45:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:45:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:55,903 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:56,100 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-11-26 10:45:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:45:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 10:45:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:56,102 INFO L225 Difference]: With dead ends: 75 [2023-11-26 10:45:56,102 INFO L226 Difference]: Without dead ends: 75 [2023-11-26 10:45:56,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:45:56,103 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:56,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 243 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-26 10:45:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2023-11-26 10:45:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.8) internal successors, (72), 59 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-11-26 10:45:56,108 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 13 [2023-11-26 10:45:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:56,108 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-11-26 10:45:56,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:56,109 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-11-26 10:45:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 10:45:56,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:56,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:56,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:45:56,110 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:56,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1344904562, now seen corresponding path program 1 times [2023-11-26 10:45:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824251566] [2023-11-26 10:45:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824251566] [2023-11-26 10:45:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824251566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:56,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:56,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:45:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891402927] [2023-11-26 10:45:56,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:56,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:45:56,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:45:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:56,618 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:56,839 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-11-26 10:45:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:45:56,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-26 10:45:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:56,840 INFO L225 Difference]: With dead ends: 69 [2023-11-26 10:45:56,840 INFO L226 Difference]: Without dead ends: 69 [2023-11-26 10:45:56,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:45:56,841 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:56,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:45:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-26 10:45:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-26 10:45:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.75) internal successors, (77), 63 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-26 10:45:56,845 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 14 [2023-11-26 10:45:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:56,846 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-26 10:45:56,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-26 10:45:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:45:56,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:56,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:56,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:45:56,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:56,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264992, now seen corresponding path program 1 times [2023-11-26 10:45:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:56,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141785288] [2023-11-26 10:45:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:56,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:56,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:45:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:57,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141785288] [2023-11-26 10:45:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141785288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:57,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:57,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568296849] [2023-11-26 10:45:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:57,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:57,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:57,076 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:57,209 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2023-11-26 10:45:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-26 10:45:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:57,211 INFO L225 Difference]: With dead ends: 69 [2023-11-26 10:45:57,211 INFO L226 Difference]: Without dead ends: 69 [2023-11-26 10:45:57,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:57,212 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:57,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-26 10:45:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-26 10:45:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 63 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-11-26 10:45:57,217 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 15 [2023-11-26 10:45:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:57,217 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-11-26 10:45:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:45:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-11-26 10:45:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:45:57,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:57,219 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:45:57,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:57,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264991, now seen corresponding path program 1 times [2023-11-26 10:45:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:57,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890837991] [2023-11-26 10:45:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:57,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:45:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:57,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890837991] [2023-11-26 10:45:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890837991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110654315] [2023-11-26 10:45:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:57,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:57,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:57,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:45:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 10:45:57,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:57,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:45:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:58,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:45:58,036 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:45:58,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:45:58,167 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:45:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:58,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:45:58,213 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:45:58,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:45:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 10:45:58,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:58,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110654315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:58,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:45:58,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-26 10:45:58,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576012468] [2023-11-26 10:45:58,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:58,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:45:58,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:58,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:45:58,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=259, Unknown=1, NotChecked=32, Total=342 [2023-11-26 10:45:58,399 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:45:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:58,746 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2023-11-26 10:45:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:45:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2023-11-26 10:45:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:58,748 INFO L225 Difference]: With dead ends: 70 [2023-11-26 10:45:58,748 INFO L226 Difference]: Without dead ends: 70 [2023-11-26 10:45:58,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=388, Unknown=1, NotChecked=40, Total=506 [2023-11-26 10:45:58,749 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:58,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 256 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 284 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2023-11-26 10:45:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-26 10:45:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-11-26 10:45:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 63 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2023-11-26 10:45:58,752 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 15 [2023-11-26 10:45:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:58,753 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2023-11-26 10:45:58,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:45:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2023-11-26 10:45:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:45:58,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:58,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:58,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:58,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:45:58,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:58,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:58,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1257742689, now seen corresponding path program 1 times [2023-11-26 10:45:58,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:58,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097717230] [2023-11-26 10:45:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:59,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:59,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097717230] [2023-11-26 10:45:59,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097717230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:59,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:59,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:45:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014124339] [2023-11-26 10:45:59,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:59,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:45:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:45:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:59,106 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:59,213 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-11-26 10:45:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:45:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-26 10:45:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:59,215 INFO L225 Difference]: With dead ends: 74 [2023-11-26 10:45:59,215 INFO L226 Difference]: Without dead ends: 74 [2023-11-26 10:45:59,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:59,216 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:59,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 260 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-26 10:45:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2023-11-26 10:45:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:45:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2023-11-26 10:45:59,221 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 15 [2023-11-26 10:45:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:59,221 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2023-11-26 10:45:59,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:45:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2023-11-26 10:45:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:45:59,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:59,224 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:45:59,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:45:59,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -331815379, now seen corresponding path program 1 times [2023-11-26 10:45:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062757049] [2023-11-26 10:45:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:59,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:45:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:59,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:59,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062757049] [2023-11-26 10:45:59,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062757049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:59,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279060406] [2023-11-26 10:45:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:59,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:59,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:59,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:00,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-26 10:46:00,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:00,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:46:00,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:00,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:00,177 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:46:00,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:46:00,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:46:00,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:46:00,344 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 10:46:00,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:46:00,365 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-26 10:46:00,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-26 10:46:00,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:00,835 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 59 treesize of output 43 [2023-11-26 10:46:00,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:00,847 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 39 treesize of output 39 [2023-11-26 10:46:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:01,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:01,703 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_create_~now~0#1.offset| Int) (v_ArrVal_394 (Array Int Int)) (|v_ULTIMATE.start_loop_~x#1.offset_23| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_394))) (store .cse1 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) |ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) (+ |v_ULTIMATE.start_loop_~x#1.offset_23| 8)))) (or (= (select |c_#valid| .cse0) 1) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_23|) (= 0 .cse0) (< |v_ULTIMATE.start_loop_~x#1.offset_23| 0)))) (forall ((|ULTIMATE.start_create_~now~0#1.offset| Int) (v_ArrVal_393 (Array Int Int)) (v_ArrVal_394 (Array Int Int)) (|v_ULTIMATE.start_loop_~x#1.offset_23| Int)) (let ((.cse3 (+ |v_ULTIMATE.start_loop_~x#1.offset_23| 8))) (or (= (select |c_#valid| (select (select (let ((.cse2 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_394))) (store .cse2 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) |ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3)) 1) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_393))) (store .cse4 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse4 |c_ULTIMATE.start_create_~now~0#1.base|) |ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_~data~0#1.offset|))) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3) 0) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_23|) (< |v_ULTIMATE.start_loop_~x#1.offset_23| 0))))) is different from false [2023-11-26 10:46:02,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 118 [2023-11-26 10:46:02,306 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 176 treesize of output 168 [2023-11-26 10:46:02,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 160 [2023-11-26 10:46:02,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 192 treesize of output 200 [2023-11-26 10:46:02,381 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 184 treesize of output 180 [2023-11-26 10:46:02,393 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 181 treesize of output 177 [2023-11-26 10:46:02,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 176 [2023-11-26 10:46:02,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 188 [2023-11-26 10:46:02,454 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 192 treesize of output 184 [2023-11-26 10:46:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:04,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279060406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:04,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:04,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 30 [2023-11-26 10:46:04,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593139876] [2023-11-26 10:46:04,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:04,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:46:04,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:04,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:46:04,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=733, Unknown=1, NotChecked=54, Total=870 [2023-11-26 10:46:04,362 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 30 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:46:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:05,538 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2023-11-26 10:46:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:46:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2023-11-26 10:46:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:05,540 INFO L225 Difference]: With dead ends: 71 [2023-11-26 10:46:05,540 INFO L226 Difference]: Without dead ends: 71 [2023-11-26 10:46:05,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=140, Invalid=1123, Unknown=1, NotChecked=68, Total=1332 [2023-11-26 10:46:05,542 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:05,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 515 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 502 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2023-11-26 10:46:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-26 10:46:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-11-26 10:46:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 65 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-11-26 10:46:05,545 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 16 [2023-11-26 10:46:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:05,545 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-11-26 10:46:05,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:46:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-11-26 10:46:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:46:05,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:05,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:05,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:05,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:05,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:05,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422936, now seen corresponding path program 1 times [2023-11-26 10:46:05,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:05,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124231987] [2023-11-26 10:46:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:05,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:05,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:05,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:46:05,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:05,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124231987] [2023-11-26 10:46:05,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124231987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:05,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:05,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:46:05,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970834174] [2023-11-26 10:46:05,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:46:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:46:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:05,914 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:06,049 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-11-26 10:46:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:46:06,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 10:46:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:06,050 INFO L225 Difference]: With dead ends: 69 [2023-11-26 10:46:06,050 INFO L226 Difference]: Without dead ends: 69 [2023-11-26 10:46:06,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:46:06,051 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:06,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 164 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-26 10:46:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-26 10:46:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2023-11-26 10:46:06,054 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 17 [2023-11-26 10:46:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:06,055 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2023-11-26 10:46:06,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2023-11-26 10:46:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:46:06,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:06,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:06,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:46:06,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:06,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422935, now seen corresponding path program 1 times [2023-11-26 10:46:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282978649] [2023-11-26 10:46:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:06,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:06,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282978649] [2023-11-26 10:46:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282978649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:06,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:06,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:46:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780244847] [2023-11-26 10:46:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:06,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:46:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:46:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:46:06,329 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:06,482 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-11-26 10:46:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:46:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 10:46:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:06,484 INFO L225 Difference]: With dead ends: 68 [2023-11-26 10:46:06,484 INFO L226 Difference]: Without dead ends: 68 [2023-11-26 10:46:06,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:46:06,485 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:06,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 207 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-26 10:46:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-26 10:46:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.5) internal successors, (69), 63 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-26 10:46:06,488 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 17 [2023-11-26 10:46:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:06,488 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-26 10:46:06,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-26 10:46:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:46:06,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:06,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:06,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:46:06,489 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:06,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1047044963, now seen corresponding path program 1 times [2023-11-26 10:46:06,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:06,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390152938] [2023-11-26 10:46:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:06,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:06,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390152938] [2023-11-26 10:46:06,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390152938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:06,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661159886] [2023-11-26 10:46:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:06,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:06,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:46:06,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:06,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661159886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:06,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:06,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-11-26 10:46:06,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633197879] [2023-11-26 10:46:06,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:06,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:46:06,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:46:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:06,756 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:06,894 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2023-11-26 10:46:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:46:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-26 10:46:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:06,896 INFO L225 Difference]: With dead ends: 95 [2023-11-26 10:46:06,896 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 10:46:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:06,897 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 104 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 10:46:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-11-26 10:46:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 70 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-11-26 10:46:06,902 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 18 [2023-11-26 10:46:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:06,902 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-11-26 10:46:06,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-11-26 10:46:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:46:06,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:06,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:06,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:07,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 10:46:07,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:07,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1047044962, now seen corresponding path program 1 times [2023-11-26 10:46:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:07,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917720118] [2023-11-26 10:46:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:07,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:07,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917720118] [2023-11-26 10:46:07,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917720118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:07,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390660748] [2023-11-26 10:46:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:07,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:07,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:07,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:46:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 10:46:07,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:07,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:07,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:07,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-11-26 10:46:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:07,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390660748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:07,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:07,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-11-26 10:46:07,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084469295] [2023-11-26 10:46:07,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:46:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:46:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:46:07,705 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:08,005 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2023-11-26 10:46:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:46:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-26 10:46:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:08,007 INFO L225 Difference]: With dead ends: 88 [2023-11-26 10:46:08,007 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:46:08,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:46:08,008 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:08,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 211 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:46:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2023-11-26 10:46:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 72 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2023-11-26 10:46:08,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 18 [2023-11-26 10:46:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:08,012 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2023-11-26 10:46:08,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2023-11-26 10:46:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:46:08,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:08,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:08,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:46:08,218 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:08,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1901344563, now seen corresponding path program 1 times [2023-11-26 10:46:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452956530] [2023-11-26 10:46:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:08,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:08,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452956530] [2023-11-26 10:46:08,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452956530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:08,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:08,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:46:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802490901] [2023-11-26 10:46:08,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:08,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:46:08,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:08,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:46:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:46:08,373 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:08,578 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2023-11-26 10:46:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-26 10:46:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:08,581 INFO L225 Difference]: With dead ends: 107 [2023-11-26 10:46:08,581 INFO L226 Difference]: Without dead ends: 107 [2023-11-26 10:46:08,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:08,582 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:08,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 165 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-26 10:46:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 81. [2023-11-26 10:46:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 76 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2023-11-26 10:46:08,587 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 19 [2023-11-26 10:46:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:08,588 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2023-11-26 10:46:08,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2023-11-26 10:46:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:46:08,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:08,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:08,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:46:08,593 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:08,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1187515612, now seen corresponding path program 1 times [2023-11-26 10:46:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046989929] [2023-11-26 10:46:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046989929] [2023-11-26 10:46:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046989929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:08,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:08,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:46:08,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127318950] [2023-11-26 10:46:08,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:08,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:08,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:08,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:08,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:08,716 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:08,856 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2023-11-26 10:46:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-26 10:46:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:08,858 INFO L225 Difference]: With dead ends: 83 [2023-11-26 10:46:08,858 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 10:46:08,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:08,858 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:08,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 188 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 10:46:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2023-11-26 10:46:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.423728813559322) internal successors, (84), 74 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2023-11-26 10:46:08,862 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 20 [2023-11-26 10:46:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:08,862 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2023-11-26 10:46:08,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2023-11-26 10:46:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:46:08,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:08,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:08,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:46:08,863 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:08,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1187860579, now seen corresponding path program 1 times [2023-11-26 10:46:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:08,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847774952] [2023-11-26 10:46:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847774952] [2023-11-26 10:46:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847774952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:09,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:46:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044545986] [2023-11-26 10:46:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:46:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:46:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:46:09,067 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:09,275 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2023-11-26 10:46:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-26 10:46:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:09,276 INFO L225 Difference]: With dead ends: 101 [2023-11-26 10:46:09,276 INFO L226 Difference]: Without dead ends: 101 [2023-11-26 10:46:09,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:09,277 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:09,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 145 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-26 10:46:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2023-11-26 10:46:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 75 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-26 10:46:09,282 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 20 [2023-11-26 10:46:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:09,282 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-26 10:46:09,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-26 10:46:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:46:09,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:09,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:09,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:46:09,284 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:09,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1831027829, now seen corresponding path program 1 times [2023-11-26 10:46:09,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511192337] [2023-11-26 10:46:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511192337] [2023-11-26 10:46:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511192337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127111448] [2023-11-26 10:46:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:09,455 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:09,638 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2023-11-26 10:46:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-26 10:46:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:09,640 INFO L225 Difference]: With dead ends: 81 [2023-11-26 10:46:09,640 INFO L226 Difference]: Without dead ends: 81 [2023-11-26 10:46:09,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:46:09,641 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:09,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 166 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-26 10:46:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-26 10:46:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 76 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2023-11-26 10:46:09,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2023-11-26 10:46:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:09,646 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2023-11-26 10:46:09,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2023-11-26 10:46:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:46:09,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:09,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:09,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 10:46:09,648 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:09,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1318843688, now seen corresponding path program 1 times [2023-11-26 10:46:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:09,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193132483] [2023-11-26 10:46:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:09,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:09,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193132483] [2023-11-26 10:46:09,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193132483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:09,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:09,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 10:46:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749137007] [2023-11-26 10:46:09,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:46:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:46:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:09,927 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:10,205 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-11-26 10:46:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:46:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-26 10:46:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:10,207 INFO L225 Difference]: With dead ends: 87 [2023-11-26 10:46:10,207 INFO L226 Difference]: Without dead ends: 87 [2023-11-26 10:46:10,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:10,208 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:10,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 173 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-26 10:46:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-26 10:46:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 78 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-11-26 10:46:10,212 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 23 [2023-11-26 10:46:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:10,212 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-11-26 10:46:10,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-11-26 10:46:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-26 10:46:10,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:10,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 10:46:10,213 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:10,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1815314652, now seen corresponding path program 1 times [2023-11-26 10:46:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:10,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245914210] [2023-11-26 10:46:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:10,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:10,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245914210] [2023-11-26 10:46:10,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245914210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:10,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677221350] [2023-11-26 10:46:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:10,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:10,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:10,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:46:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:10,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 10:46:10,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:10,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:10,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:10,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-11-26 10:46:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677221350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:11,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-26 10:46:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668141371] [2023-11-26 10:46:11,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 10:46:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 10:46:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-26 10:46:11,103 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 22 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:46:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:11,328 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2023-11-26 10:46:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:46:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2023-11-26 10:46:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:11,330 INFO L225 Difference]: With dead ends: 85 [2023-11-26 10:46:11,330 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 10:46:11,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:46:11,331 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:11,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 495 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 10:46:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-11-26 10:46:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.390625) internal successors, (89), 79 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2023-11-26 10:46:11,335 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 24 [2023-11-26 10:46:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:11,335 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2023-11-26 10:46:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:46:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2023-11-26 10:46:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:46:11,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:11,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:11,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 10:46:11,538 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:11,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash -394812818, now seen corresponding path program 1 times [2023-11-26 10:46:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698273003] [2023-11-26 10:46:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:11,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:11,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:11,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:46:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:46:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698273003] [2023-11-26 10:46:11,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698273003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:11,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147726616] [2023-11-26 10:46:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:11,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:11,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:11,986 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:11,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:46:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:12,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 10:46:12,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:12,225 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:46:12,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:46:12,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:46:12,361 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-26 10:46:12,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-26 10:46:12,375 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 31 treesize of output 13 [2023-11-26 10:46:12,435 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 10:46:12,475 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-26 10:46:12,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-26 10:46:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 10:46:12,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147726616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:12,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:12,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2023-11-26 10:46:12,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824562174] [2023-11-26 10:46:12,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:12,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 10:46:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 10:46:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=313, Unknown=1, NotChecked=36, Total=420 [2023-11-26 10:46:12,539 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 20 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:46:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:12,851 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-11-26 10:46:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:46:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2023-11-26 10:46:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:12,853 INFO L225 Difference]: With dead ends: 83 [2023-11-26 10:46:12,853 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 10:46:12,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=345, Unknown=1, NotChecked=38, Total=462 [2023-11-26 10:46:12,854 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:12,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 332 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2023-11-26 10:46:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 10:46:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 10:46:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.375) internal successors, (88), 78 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-11-26 10:46:12,858 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 25 [2023-11-26 10:46:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:12,858 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-11-26 10:46:12,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:46:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-11-26 10:46:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:46:12,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:12,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:12,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:13,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 10:46:13,070 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:13,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash -394812817, now seen corresponding path program 1 times [2023-11-26 10:46:13,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:13,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029720011] [2023-11-26 10:46:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:46:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:46:13,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029720011] [2023-11-26 10:46:13,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029720011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:13,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061442659] [2023-11-26 10:46:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:13,785 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:13,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:46:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:13,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 10:46:13,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:14,079 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:46:14,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:46:14,129 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 19 treesize of output 1 [2023-11-26 10:46:14,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:46:14,264 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-26 10:46:14,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2023-11-26 10:46:14,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2023-11-26 10:46:14,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2023-11-26 10:46:14,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-26 10:46:14,419 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:46:14,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:14,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:46:14,456 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-26 10:46:14,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-26 10:46:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 10:46:14,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:14,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061442659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:14,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2023-11-26 10:46:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327384164] [2023-11-26 10:46:14,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:46:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:46:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2023-11-26 10:46:14,615 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 24 states, 20 states have (on average 1.55) internal successors, (31), 17 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:46:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:15,319 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2023-11-26 10:46:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:46:15,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 17 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-11-26 10:46:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:15,320 INFO L225 Difference]: With dead ends: 80 [2023-11-26 10:46:15,320 INFO L226 Difference]: Without dead ends: 80 [2023-11-26 10:46:15,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=963, Unknown=1, NotChecked=64, Total=1190 [2023-11-26 10:46:15,322 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:15,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 428 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 495 Invalid, 0 Unknown, 55 Unchecked, 0.4s Time] [2023-11-26 10:46:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-26 10:46:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-26 10:46:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.328125) internal successors, (85), 75 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-26 10:46:15,325 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 25 [2023-11-26 10:46:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:15,325 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-26 10:46:15,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 17 states have internal predecessors, (31), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:46:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-26 10:46:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:46:15,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:15,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:15,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 10:46:15,527 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:15,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -393404590, now seen corresponding path program 1 times [2023-11-26 10:46:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538065504] [2023-11-26 10:46:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:15,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538065504] [2023-11-26 10:46:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538065504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:15,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:15,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:46:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65357108] [2023-11-26 10:46:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:15,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:46:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:46:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:15,699 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:15,856 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-11-26 10:46:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:46:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-26 10:46:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:15,857 INFO L225 Difference]: With dead ends: 82 [2023-11-26 10:46:15,857 INFO L226 Difference]: Without dead ends: 82 [2023-11-26 10:46:15,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:15,858 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:15,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 139 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-26 10:46:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-11-26 10:46:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.323076923076923) internal successors, (86), 76 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2023-11-26 10:46:15,861 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 25 [2023-11-26 10:46:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:15,864 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2023-11-26 10:46:15,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:46:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2023-11-26 10:46:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:46:15,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:15,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:15,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-26 10:46:15,866 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:15,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash -760601761, now seen corresponding path program 1 times [2023-11-26 10:46:15,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:15,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297685296] [2023-11-26 10:46:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:15,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:16,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:16,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297685296] [2023-11-26 10:46:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297685296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297798465] [2023-11-26 10:46:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:16,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:16,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:16,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:46:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:16,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-26 10:46:16,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:16,971 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:46:16,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:46:17,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:46:17,162 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:46:17,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:46:17,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 10:46:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:17,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:17,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:17,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-11-26 10:46:17,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:17,549 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 40 treesize of output 39 [2023-11-26 10:46:17,553 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 9 treesize of output 5 [2023-11-26 10:46:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297798465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:17,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-11-26 10:46:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532826209] [2023-11-26 10:46:17,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:46:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:46:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1114, Unknown=17, NotChecked=0, Total=1260 [2023-11-26 10:46:17,819 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:46:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:18,319 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2023-11-26 10:46:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:46:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-11-26 10:46:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:18,321 INFO L225 Difference]: With dead ends: 88 [2023-11-26 10:46:18,321 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:46:18,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1303, Unknown=17, NotChecked=0, Total=1482 [2023-11-26 10:46:18,322 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:18,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 473 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:46:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:46:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2023-11-26 10:46:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 78 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-11-26 10:46:18,327 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2023-11-26 10:46:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:18,327 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-11-26 10:46:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:46:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-11-26 10:46:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:46:18,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:18,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:18,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:18,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 10:46:18,539 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:18,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:18,539 INFO L85 PathProgramCache]: Analyzing trace with hash -760601760, now seen corresponding path program 1 times [2023-11-26 10:46:18,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:18,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335347350] [2023-11-26 10:46:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:19,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:19,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335347350] [2023-11-26 10:46:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335347350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696011766] [2023-11-26 10:46:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:19,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:19,398 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:19,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:46:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:19,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-26 10:46:19,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:19,777 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:46:19,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:46:19,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:46:19,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:19,944 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:46:19,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:46:19,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-26 10:46:20,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 10:46:20,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 10:46:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:20,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:20,269 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1365 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1365) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0))) (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1365) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1364) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0)))))) is different from false [2023-11-26 10:46:20,282 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|))) (.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1365 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1365) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1364) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)))) (forall ((v_ArrVal_1365 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1365) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1))))) is different from false [2023-11-26 10:46:20,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:20,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2023-11-26 10:46:20,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:20,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-26 10:46:20,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:20,311 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 62 treesize of output 61 [2023-11-26 10:46:20,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:20,327 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 96 treesize of output 89 [2023-11-26 10:46:20,362 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 [2023-11-26 10:46:20,366 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 11 treesize of output 7 [2023-11-26 10:46:20,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:20,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-26 10:46:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:46:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:20,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-26 10:46:20,482 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 [2023-11-26 10:46:20,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696011766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:20,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:20,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-11-26 10:46:20,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324050293] [2023-11-26 10:46:20,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:20,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 10:46:20,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 10:46:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1071, Unknown=2, NotChecked=134, Total=1332 [2023-11-26 10:46:20,536 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:46:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:21,063 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2023-11-26 10:46:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:46:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-11-26 10:46:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:21,064 INFO L225 Difference]: With dead ends: 86 [2023-11-26 10:46:21,065 INFO L226 Difference]: Without dead ends: 86 [2023-11-26 10:46:21,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=1391, Unknown=2, NotChecked=154, Total=1722 [2023-11-26 10:46:21,066 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 16 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:21,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 558 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:46:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-26 10:46:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-11-26 10:46:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 79 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2023-11-26 10:46:21,070 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 26 [2023-11-26 10:46:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:21,070 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2023-11-26 10:46:21,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 10:46:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2023-11-26 10:46:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 10:46:21,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:21,071 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:21,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:21,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 10:46:21,272 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:21,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1049743832, now seen corresponding path program 1 times [2023-11-26 10:46:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:21,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274545003] [2023-11-26 10:46:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:21,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:21,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:21,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274545003] [2023-11-26 10:46:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274545003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772793751] [2023-11-26 10:46:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:21,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:21,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:21,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:46:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:21,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 10:46:21,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:21,941 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 8 treesize of output 1 [2023-11-26 10:46:21,944 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 8 treesize of output 1 [2023-11-26 10:46:22,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:22,179 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 17 treesize of output 15 [2023-11-26 10:46:22,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:22,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:46:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:22,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:22,680 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 10:46:22,680 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 62 treesize of output 55 [2023-11-26 10:46:22,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:46:22,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2023-11-26 10:46:22,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:46:22,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2023-11-26 10:46:22,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:46:22,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2023-11-26 10:46:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:22,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772793751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:22,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:22,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 32 [2023-11-26 10:46:22,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432083950] [2023-11-26 10:46:22,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:22,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 10:46:22,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:22,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 10:46:22,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2023-11-26 10:46:22,823 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 32 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:23,505 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2023-11-26 10:46:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:46:23,505 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-26 10:46:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:23,506 INFO L225 Difference]: With dead ends: 118 [2023-11-26 10:46:23,506 INFO L226 Difference]: Without dead ends: 118 [2023-11-26 10:46:23,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2023-11-26 10:46:23,508 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:23,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 377 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:46:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-26 10:46:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2023-11-26 10:46:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 97 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2023-11-26 10:46:23,512 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 28 [2023-11-26 10:46:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:23,512 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2023-11-26 10:46:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:46:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2023-11-26 10:46:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:46:23,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:23,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:23,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:23,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 10:46:23,713 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:23,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1158976705, now seen corresponding path program 1 times [2023-11-26 10:46:23,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465687381] [2023-11-26 10:46:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:46:24,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465687381] [2023-11-26 10:46:24,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465687381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:24,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955107265] [2023-11-26 10:46:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:24,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:24,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:24,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:46:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:24,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-26 10:46:24,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:24,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:25,060 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:46:25,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:46:25,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:46:25,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:46:25,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:25,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-26 10:46:25,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-26 10:46:25,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 10:46:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:25,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:25,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955107265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:25,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:46:25,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-26 10:46:25,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657451382] [2023-11-26 10:46:25,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:25,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 10:46:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 10:46:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1288, Unknown=2, NotChecked=0, Total=1406 [2023-11-26 10:46:25,796 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 31 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:46:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:26,421 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2023-11-26 10:46:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:46:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-11-26 10:46:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:26,423 INFO L225 Difference]: With dead ends: 138 [2023-11-26 10:46:26,423 INFO L226 Difference]: Without dead ends: 138 [2023-11-26 10:46:26,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=1867, Unknown=2, NotChecked=0, Total=2070 [2023-11-26 10:46:26,425 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:26,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 485 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:46:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-26 10:46:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2023-11-26 10:46:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 99 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:46:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2023-11-26 10:46:26,430 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 29 [2023-11-26 10:46:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:26,430 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2023-11-26 10:46:26,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:46:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2023-11-26 10:46:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:46:26,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:26,431 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:26,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:26,638 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-11-26 10:46:26,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1162478973, now seen corresponding path program 2 times [2023-11-26 10:46:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:26,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873078562] [2023-11-26 10:46:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:27,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 10:46:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:27,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:46:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:27,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873078562] [2023-11-26 10:46:27,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873078562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:27,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155313966] [2023-11-26 10:46:27,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:27,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:27,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:27,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:27,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8e33f55-a028-4c36-829d-b13cd8c8d7ef/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:46:28,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:28,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-26 10:46:28,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:28,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:28,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:28,326 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:46:28,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:46:28,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-26 10:46:28,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-26 10:46:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:28,548 INFO L349 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2023-11-26 10:46:28,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 60 [2023-11-26 10:46:28,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:28,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 29 [2023-11-26 10:46:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:28,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:35,471 INFO L349 Elim1Store]: treesize reduction 1482, result has 47.2 percent of original size [2023-11-26 10:46:35,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 7523 treesize of output 5390