./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:11:29,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:11:29,793 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:11:29,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:11:29,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:11:29,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:11:29,855 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:11:29,855 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:11:29,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:11:29,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:11:29,865 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:11:29,865 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:11:29,866 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:11:29,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:11:29,869 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:11:29,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:11:29,870 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:11:29,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:11:29,871 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:11:29,871 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:11:29,872 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:11:29,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:11:29,873 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:11:29,874 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:11:29,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:11:29,875 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:11:29,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:11:29,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:11:29,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:11:29,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:29,880 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:11:29,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:11:29,880 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:11:29,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:11:29,881 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:11:29,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:11:29,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:11:29,882 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:11:29,883 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_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2023-11-12 02:11:30,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:11:30,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:11:30,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:11:30,274 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:11:30,275 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:11:30,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2023-11-12 02:11:33,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:11:33,779 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:11:33,779 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2023-11-12 02:11:33,802 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/data/feb681240/cd84c9f94c91480fa67defe3e5f911d9/FLAG7b4551b6b [2023-11-12 02:11:33,820 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/data/feb681240/cd84c9f94c91480fa67defe3e5f911d9 [2023-11-12 02:11:33,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:11:33,829 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:11:33,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:33,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:11:33,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:11:33,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:33" (1/1) ... [2023-11-12 02:11:33,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794d557a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:33, skipping insertion in model container [2023-11-12 02:11:33,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:33" (1/1) ... [2023-11-12 02:11:33,902 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:11:34,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:34,287 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:11:34,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:34,381 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:11:34,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34 WrapperNode [2023-11-12 02:11:34,382 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:34,383 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:34,383 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:11:34,383 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:11:34,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,443 INFO L138 Inliner]: procedures = 126, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 120 [2023-11-12 02:11:34,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:34,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:11:34,448 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:11:34,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:11:34,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:11:34,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:11:34,490 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:11:34,490 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:11:34,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (1/1) ... [2023-11-12 02:11:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:34,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:11:34,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:11:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-12 02:11:34,563 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-12 02:11:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:11:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:11:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:11:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:11:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:11:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:11:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:11:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:11:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:11:34,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:11:34,691 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:11:34,698 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:11:34,741 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-12 02:11:35,039 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:11:35,050 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:11:35,051 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:11:35,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:35 BoogieIcfgContainer [2023-11-12 02:11:35,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:11:35,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:11:35,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:11:35,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:11:35,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:11:33" (1/3) ... [2023-11-12 02:11:35,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40411654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:35, skipping insertion in model container [2023-11-12 02:11:35,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:34" (2/3) ... [2023-11-12 02:11:35,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40411654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:35, skipping insertion in model container [2023-11-12 02:11:35,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:35" (3/3) ... [2023-11-12 02:11:35,086 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2023-11-12 02:11:35,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:11:35,111 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2023-11-12 02:11:35,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:11:35,182 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;@7d9aac7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:11:35,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-12 02:11:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 68 states have internal predecessors, (84), 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) [2023-11-12 02:11:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 02:11:35,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:35,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:11:35,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:35,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2023-11-12 02:11:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375044414] [2023-11-12 02:11:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:35,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375044414] [2023-11-12 02:11:35,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375044414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:35,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:35,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864667719] [2023-11-12 02:11:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:35,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:35,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:35,586 INFO L87 Difference]: Start difference. First operand has 70 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 68 states have internal predecessors, (84), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:35,707 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-12 02:11:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:35,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 02:11:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:35,717 INFO L225 Difference]: With dead ends: 66 [2023-11-12 02:11:35,717 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 02:11:35,719 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 [2023-11-12 02:11:35,723 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:35,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 02:11:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-12 02:11:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-12 02:11:35,762 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 5 [2023-11-12 02:11:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:35,762 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-12 02:11:35,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-12 02:11:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 02:11:35,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:35,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:11:35,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:11:35,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:35,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2023-11-12 02:11:35,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:35,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618179416] [2023-11-12 02:11:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:35,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:35,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:35,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618179416] [2023-11-12 02:11:35,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618179416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:35,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:35,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:35,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208793493] [2023-11-12 02:11:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:35,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:35,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:35,928 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:36,012 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-12 02:11:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:36,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 02:11:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:36,015 INFO L225 Difference]: With dead ends: 58 [2023-11-12 02:11:36,015 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 02:11:36,016 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 [2023-11-12 02:11:36,017 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:36,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 97 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 02:11:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-12 02:11:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2023-11-12 02:11:36,027 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 5 [2023-11-12 02:11:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:36,028 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2023-11-12 02:11:36,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2023-11-12 02:11:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:11:36,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:36,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:36,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:11:36,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:36,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 678997037, now seen corresponding path program 1 times [2023-11-12 02:11:36,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830129449] [2023-11-12 02:11:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:36,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830129449] [2023-11-12 02:11:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830129449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:36,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907823482] [2023-11-12 02:11:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:36,179 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:36,196 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-11-12 02:11:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 02:11:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:36,198 INFO L225 Difference]: With dead ends: 68 [2023-11-12 02:11:36,198 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 02:11:36,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:36,200 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:36,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 02:11:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-11-12 02:11:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2023-11-12 02:11:36,210 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 8 [2023-11-12 02:11:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:36,210 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2023-11-12 02:11:36,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2023-11-12 02:11:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 02:11:36,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:36,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:11:36,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:36,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2023-11-12 02:11:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:36,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610114063] [2023-11-12 02:11:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:36,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:36,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610114063] [2023-11-12 02:11:36,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610114063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:36,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:36,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536864142] [2023-11-12 02:11:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:36,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:36,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:36,313 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:36,338 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-11-12 02:11:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 02:11:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:36,340 INFO L225 Difference]: With dead ends: 65 [2023-11-12 02:11:36,340 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:11:36,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:36,343 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:36,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:11:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-12 02:11:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-11-12 02:11:36,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 9 [2023-11-12 02:11:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:36,352 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-11-12 02:11:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-12 02:11:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 02:11:36,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:36,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:36,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:11:36,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:36,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2114731710, now seen corresponding path program 1 times [2023-11-12 02:11:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:36,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56285792] [2023-11-12 02:11:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:36,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:36,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:36,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56285792] [2023-11-12 02:11:36,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56285792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:36,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632476786] [2023-11-12 02:11:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:36,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:36,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:36,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:36,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:11:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:36,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:36,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:36,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:36,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632476786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:36,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:36,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-12 02:11:36,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203718266] [2023-11-12 02:11:36,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:36,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:11:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:11:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:36,848 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:36,883 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-11-12 02:11:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:11:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 02:11:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:36,886 INFO L225 Difference]: With dead ends: 66 [2023-11-12 02:11:36,887 INFO L226 Difference]: Without dead ends: 66 [2023-11-12 02:11:36,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:36,899 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:36,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 180 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-12 02:11:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-12 02:11:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.469387755102041) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-11-12 02:11:36,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2023-11-12 02:11:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:36,916 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-11-12 02:11:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-11-12 02:11:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:11:36,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:36,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:36,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:11:37,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:37,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:37,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2023-11-12 02:11:37,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:37,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018695430] [2023-11-12 02:11:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:37,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:37,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:37,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018695430] [2023-11-12 02:11:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018695430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868978415] [2023-11-12 02:11:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:37,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:37,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:37,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:37,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:11:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:37,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:11:37,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:37,609 INFO L351 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 [2023-11-12 02:11:37,662 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:11:37,663 INFO L351 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 19 treesize of output 16 [2023-11-12 02:11:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:37,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:37,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868978415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:37,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:37,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2023-11-12 02:11:37,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65292852] [2023-11-12 02:11:37,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:37,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:37,832 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:37,974 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-11-12 02:11:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:11:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 02:11:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:37,976 INFO L225 Difference]: With dead ends: 65 [2023-11-12 02:11:37,976 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:11:37,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:11:37,978 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:37,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 231 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:11:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-12 02:11:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-11-12 02:11:37,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 16 [2023-11-12 02:11:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:37,984 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-11-12 02:11:37,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-11-12 02:11:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:11:37,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:37,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:38,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:38,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:38,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:38,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2023-11-12 02:11:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:38,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782032895] [2023-11-12 02:11:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782032895] [2023-11-12 02:11:38,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782032895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134634137] [2023-11-12 02:11:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:38,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:38,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:38,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:38,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:11:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:38,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:11:38,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:38,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:11:38,606 INFO L351 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 [2023-11-12 02:11:38,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:11:38,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 02:11:38,703 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:11:38,703 INFO L351 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 [2023-11-12 02:11:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:38,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:39,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134634137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:39,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:39,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-12 02:11:39,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918071847] [2023-11-12 02:11:39,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:39,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:11:39,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:11:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:11:39,056 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:39,270 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-12 02:11:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:11:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 02:11:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:39,271 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:11:39,272 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 02:11:39,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:39,273 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:39,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 307 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:11:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 02:11:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-12 02:11:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-11-12 02:11:39,278 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 16 [2023-11-12 02:11:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:39,278 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-11-12 02:11:39,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:39,278 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-12 02:11:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 02:11:39,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:39,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:39,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:39,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:39,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1891969267, now seen corresponding path program 2 times [2023-11-12 02:11:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990098976] [2023-11-12 02:11:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:39,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990098976] [2023-11-12 02:11:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990098976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869036609] [2023-11-12 02:11:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:11:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:39,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:39,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:11:39,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:11:39,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:11:39,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:39,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:39,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:39,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869036609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:39,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:39,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-12 02:11:39,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579143693] [2023-11-12 02:11:39,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:39,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:11:39,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:11:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:11:39,748 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:39,785 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-12 02:11:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:11:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-12 02:11:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:39,786 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:11:39,787 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 02:11:39,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:39,788 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:39,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 155 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 02:11:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-12 02:11:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 63 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-11-12 02:11:39,793 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 22 [2023-11-12 02:11:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:39,794 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-11-12 02:11:39,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-11-12 02:11:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 02:11:39,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:39,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:39,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:40,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:40,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:40,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1779022382, now seen corresponding path program 1 times [2023-11-12 02:11:40,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:40,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737497858] [2023-11-12 02:11:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:11:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737497858] [2023-11-12 02:11:40,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737497858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:40,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:40,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:11:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124612332] [2023-11-12 02:11:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:40,175 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:40,354 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2023-11-12 02:11:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:11:40,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-12 02:11:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:40,356 INFO L225 Difference]: With dead ends: 83 [2023-11-12 02:11:40,356 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 02:11:40,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:40,359 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:40,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 148 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 02:11:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2023-11-12 02:11:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2023-11-12 02:11:40,371 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 23 [2023-11-12 02:11:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:40,372 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2023-11-12 02:11:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2023-11-12 02:11:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 02:11:40,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:40,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:40,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:11:40,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:40,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1779022381, now seen corresponding path program 1 times [2023-11-12 02:11:40,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:40,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384733363] [2023-11-12 02:11:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:40,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:40,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:40,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384733363] [2023-11-12 02:11:40,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384733363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:40,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:40,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:11:40,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294733711] [2023-11-12 02:11:40,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:40,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:40,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:40,728 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:40,950 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2023-11-12 02:11:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:11:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-12 02:11:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:40,953 INFO L225 Difference]: With dead ends: 69 [2023-11-12 02:11:40,953 INFO L226 Difference]: Without dead ends: 69 [2023-11-12 02:11:40,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:40,955 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 120 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:40,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 149 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-12 02:11:40,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-11-12 02:11:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-11-12 02:11:40,963 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 23 [2023-11-12 02:11:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:40,965 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-11-12 02:11:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-11-12 02:11:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 02:11:40,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:40,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:11:40,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:40,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash -244809887, now seen corresponding path program 1 times [2023-11-12 02:11:40,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:40,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117324332] [2023-11-12 02:11:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:40,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117324332] [2023-11-12 02:11:41,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117324332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:41,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854083484] [2023-11-12 02:11:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:41,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:41,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:41,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:11:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:41,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:11:41,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:11:41,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:41,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854083484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:41,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:41,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-12 02:11:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165330383] [2023-11-12 02:11:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:41,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:11:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:11:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:41,331 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:41,356 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-11-12 02:11:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:11:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-12 02:11:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:41,358 INFO L225 Difference]: With dead ends: 65 [2023-11-12 02:11:41,359 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:11:41,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:11:41,360 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:41,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:11:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2023-11-12 02:11:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-12 02:11:41,372 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 25 [2023-11-12 02:11:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:41,372 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-12 02:11:41,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-12 02:11:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:11:41,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:41,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:41,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:41,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:41,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:41,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689078, now seen corresponding path program 1 times [2023-11-12 02:11:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:41,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62718326] [2023-11-12 02:11:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:41,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:41,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62718326] [2023-11-12 02:11:41,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62718326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:41,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850099499] [2023-11-12 02:11:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:41,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:41,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:11:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:41,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:11:41,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:11:42,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850099499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:42,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2023-11-12 02:11:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949735246] [2023-11-12 02:11:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:42,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:42,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:42,025 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:42,069 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-11-12 02:11:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:11:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:42,070 INFO L225 Difference]: With dead ends: 49 [2023-11-12 02:11:42,070 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 02:11:42,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:11:42,072 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:42,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 75 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 02:11:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-12 02:11:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-11-12 02:11:42,076 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 26 [2023-11-12 02:11:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:42,076 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-11-12 02:11:42,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-11-12 02:11:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:11:42,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:42,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:42,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:42,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:42,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:42,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689023, now seen corresponding path program 1 times [2023-11-12 02:11:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686183884] [2023-11-12 02:11:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686183884] [2023-11-12 02:11:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686183884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454842455] [2023-11-12 02:11:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:43,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:43,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:43,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:11:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:43,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:11:43,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:43,202 INFO L351 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 [2023-11-12 02:11:43,240 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:11:43,240 INFO L351 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 [2023-11-12 02:11:43,262 INFO L351 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 11 treesize of output 7 [2023-11-12 02:11:43,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:11:43,346 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:11:43,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-12 02:11:43,587 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:43,588 INFO L351 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 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-12 02:11:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:43,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:43,752 INFO L322 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-12 02:11:43,752 INFO L351 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 21 treesize of output 20 [2023-11-12 02:11:43,823 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_681 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_681) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) is different from false [2023-11-12 02:11:43,835 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:43,835 INFO L351 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 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-12 02:11:43,842 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:43,843 INFO L351 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 46 treesize of output 28 [2023-11-12 02:11:43,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 02:11:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-12 02:11:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454842455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:43,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:43,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2023-11-12 02:11:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511973358] [2023-11-12 02:11:43,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:43,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:11:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:11:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=772, Unknown=9, NotChecked=56, Total=930 [2023-11-12 02:11:43,955 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 31 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:45,033 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-11-12 02:11:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:11:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:11:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:45,034 INFO L225 Difference]: With dead ends: 83 [2023-11-12 02:11:45,034 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 02:11:45,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=1588, Unknown=9, NotChecked=84, Total=1980 [2023-11-12 02:11:45,036 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:45,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 422 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 648 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2023-11-12 02:11:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 02:11:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2023-11-12 02:11:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.28) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2023-11-12 02:11:45,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 26 [2023-11-12 02:11:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:45,039 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2023-11-12 02:11:45,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2023-11-12 02:11:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:11:45,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:45,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:45,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:45,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:45,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689024, now seen corresponding path program 1 times [2023-11-12 02:11:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:45,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920711970] [2023-11-12 02:11:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:46,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920711970] [2023-11-12 02:11:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920711970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:46,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137783929] [2023-11-12 02:11:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:46,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:46,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:46,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:11:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:46,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-12 02:11:46,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:46,442 INFO L351 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 [2023-11-12 02:11:46,531 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:11:46,531 INFO L351 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 [2023-11-12 02:11:46,584 INFO L351 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 11 treesize of output 7 [2023-11-12 02:11:46,590 INFO L351 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 11 treesize of output 7 [2023-11-12 02:11:46,648 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:11:46,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:11:46,776 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:11:46,777 INFO L351 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 63 treesize of output 56 [2023-11-12 02:11:46,785 INFO L351 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 46 treesize of output 29 [2023-11-12 02:11:47,164 INFO L351 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 38 treesize of output 22 [2023-11-12 02:11:47,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 33 treesize of output 17 [2023-11-12 02:11:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:47,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:47,653 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:47,654 INFO L351 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 46 treesize of output 50 [2023-11-12 02:11:47,706 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_781 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_780 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_780) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0))) (forall ((v_prenex_1 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 9))))) is different from false [2023-11-12 02:11:47,756 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0 0))) (.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_781 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_780 (Array Int Int))) (<= 0 (select (select (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_780) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1))) (forall ((v_prenex_1 (Array Int Int))) (< (select (select (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 9)))))) is different from false [2023-11-12 02:11:47,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:47,771 INFO L351 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 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-12 02:11:47,776 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:47,777 INFO L351 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 46 treesize of output 28 [2023-11-12 02:11:47,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 02:11:47,787 INFO L322 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-12 02:11:47,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 1 [2023-11-12 02:11:47,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:47,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-12 02:11:47,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:11:47,804 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:47,804 INFO L351 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 1 case distinctions, treesize of input 32 treesize of output 14 [2023-11-12 02:11:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-12 02:11:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137783929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:48,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:48,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-11-12 02:11:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147174932] [2023-11-12 02:11:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-12 02:11:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-12 02:11:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1162, Unknown=2, NotChecked=138, Total=1406 [2023-11-12 02:11:48,057 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:50,015 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-11-12 02:11:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:11:50,015 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:11:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:50,016 INFO L225 Difference]: With dead ends: 65 [2023-11-12 02:11:50,016 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:11:50,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=339, Invalid=2217, Unknown=2, NotChecked=198, Total=2756 [2023-11-12 02:11:50,018 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 184 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:50,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 415 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 631 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2023-11-12 02:11:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:11:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2023-11-12 02:11:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2023-11-12 02:11:50,021 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 26 [2023-11-12 02:11:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:50,021 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2023-11-12 02:11:50,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2023-11-12 02:11:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:11:50,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:50,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:50,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:50,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:50,223 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash -709592258, now seen corresponding path program 1 times [2023-11-12 02:11:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:50,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75747385] [2023-11-12 02:11:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:11:50,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75747385] [2023-11-12 02:11:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75747385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:50,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:50,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:11:50,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177582675] [2023-11-12 02:11:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:50,352 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:50,492 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-11-12 02:11:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:11:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 02:11:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:50,493 INFO L225 Difference]: With dead ends: 67 [2023-11-12 02:11:50,493 INFO L226 Difference]: Without dead ends: 67 [2023-11-12 02:11:50,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:50,494 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:50,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 71 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-12 02:11:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2023-11-12 02:11:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-11-12 02:11:50,497 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 31 [2023-11-12 02:11:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:50,497 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-11-12 02:11:50,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-11-12 02:11:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:11:50,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:50,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:50,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:11:50,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:50,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash -709592257, now seen corresponding path program 1 times [2023-11-12 02:11:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:50,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663716393] [2023-11-12 02:11:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:50,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663716393] [2023-11-12 02:11:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663716393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931815945] [2023-11-12 02:11:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:50,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:50,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:50,657 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:50,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:11:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:50,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:11:50,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:11:50,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:50,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931815945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:50,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:50,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2023-11-12 02:11:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822957283] [2023-11-12 02:11:50,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:50,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:11:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:11:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:11:50,852 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:50,889 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-11-12 02:11:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:11:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 02:11:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:50,890 INFO L225 Difference]: With dead ends: 56 [2023-11-12 02:11:50,890 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 02:11:50,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:11:50,891 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:50,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 82 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 02:11:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2023-11-12 02:11:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-12 02:11:50,895 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 31 [2023-11-12 02:11:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:50,897 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-12 02:11:50,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-12 02:11:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:11:50,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:50,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:50,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:11:51,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:51,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash -674776797, now seen corresponding path program 1 times [2023-11-12 02:11:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683591497] [2023-11-12 02:11:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:11:51,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:51,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683591497] [2023-11-12 02:11:51,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683591497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:51,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110062079] [2023-11-12 02:11:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:51,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:51,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:51,194 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:51,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:11:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:51,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:11:51,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:51,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110062079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:51,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:51,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-12 02:11:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80942213] [2023-11-12 02:11:51,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:51,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:11:51,462 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:51,515 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-11-12 02:11:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:11:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 02:11:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:51,517 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:11:51,517 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:11:51,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:11:51,518 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:51,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 85 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:11:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-12 02:11:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2023-11-12 02:11:51,522 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 34 [2023-11-12 02:11:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:51,522 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2023-11-12 02:11:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2023-11-12 02:11:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:11:51,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:51,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:51,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:51,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:11:51,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:51,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash -634882153, now seen corresponding path program 1 times [2023-11-12 02:11:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:51,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298398241] [2023-11-12 02:11:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:51,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:11:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298398241] [2023-11-12 02:11:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298398241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816245635] [2023-11-12 02:11:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:51,912 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:51,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:11:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:52,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:11:52,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:52,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816245635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:52,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:52,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2023-11-12 02:11:52,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227779965] [2023-11-12 02:11:52,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:52,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:11:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:11:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:11:52,201 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:52,292 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-11-12 02:11:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:11:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 02:11:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:52,293 INFO L225 Difference]: With dead ends: 52 [2023-11-12 02:11:52,293 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 02:11:52,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:11:52,294 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 52 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:52,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:11:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 02:11:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-12 02:11:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-12 02:11:52,298 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2023-11-12 02:11:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:52,298 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-12 02:11:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-12 02:11:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:11:52,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:52,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:52,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:52,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:11:52,505 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:52,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:52,506 INFO L85 PathProgramCache]: Analyzing trace with hash -427165145, now seen corresponding path program 2 times [2023-11-12 02:11:52,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:52,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354135734] [2023-11-12 02:11:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:52,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:52,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:52,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354135734] [2023-11-12 02:11:52,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354135734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:52,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:52,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:11:52,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589046096] [2023-11-12 02:11:52,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:52,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:52,803 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:52,974 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-11-12 02:11:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:11:52,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-12 02:11:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:52,975 INFO L225 Difference]: With dead ends: 58 [2023-11-12 02:11:52,975 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 02:11:52,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:52,976 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:52,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 62 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 02:11:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-11-12 02:11:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.163265306122449) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-11-12 02:11:52,979 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 39 [2023-11-12 02:11:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:52,979 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-11-12 02:11:52,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-11-12 02:11:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:11:52,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:52,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 02:11:52,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:52,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -357219028, now seen corresponding path program 1 times [2023-11-12 02:11:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:52,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250698265] [2023-11-12 02:11:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:52,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250698265] [2023-11-12 02:11:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250698265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:53,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:53,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:11:53,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065533936] [2023-11-12 02:11:53,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:53,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:53,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:53,098 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:53,203 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-11-12 02:11:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:11:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-12 02:11:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:53,205 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:11:53,205 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:11:53,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:53,206 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:53,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 94 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:11:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2023-11-12 02:11:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-11-12 02:11:53,208 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 40 [2023-11-12 02:11:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:53,208 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-11-12 02:11:53,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-11-12 02:11:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 02:11:53,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:53,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-12 02:11:53,210 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:53,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash 311339877, now seen corresponding path program 1 times [2023-11-12 02:11:53,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:53,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882008077] [2023-11-12 02:11:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:53,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:53,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:53,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882008077] [2023-11-12 02:11:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882008077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:53,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:53,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:11:53,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348741579] [2023-11-12 02:11:53,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:53,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:11:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:53,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:11:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:11:53,384 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:53,508 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2023-11-12 02:11:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:11:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-12 02:11:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:53,509 INFO L225 Difference]: With dead ends: 55 [2023-11-12 02:11:53,509 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 02:11:53,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:11:53,510 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:53,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 81 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:11:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 02:11:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-12 02:11:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.14) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2023-11-12 02:11:53,512 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 42 [2023-11-12 02:11:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:53,513 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2023-11-12 02:11:53,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2023-11-12 02:11:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 02:11:53,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:53,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:53,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-12 02:11:53,514 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:11:53,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2002912181, now seen corresponding path program 1 times [2023-11-12 02:11:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:53,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048369322] [2023-11-12 02:11:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:11:54,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:54,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048369322] [2023-11-12 02:11:54,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048369322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:54,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286717205] [2023-11-12 02:11:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:54,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:54,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:11:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:55,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-12 02:11:55,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:55,137 INFO L351 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 [2023-11-12 02:11:55,182 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:11:55,183 INFO L351 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 [2023-11-12 02:11:55,227 INFO L351 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 11 treesize of output 7 [2023-11-12 02:11:55,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:11:55,339 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:11:55,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-12 02:11:55,773 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:11:55,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-12 02:11:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:11:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:11:55,880 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:55,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2023-11-12 02:11:56,015 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:56,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:11:56,205 INFO L322 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-12 02:11:56,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:11:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:11:56,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:56,636 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1443 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_24| Int)) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1442) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_24| v_ArrVal_1443) 4)) 1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_24|))) is different from false [2023-11-12 02:11:56,902 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1443 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_24| Int)) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_1442) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_24| v_ArrVal_1443) 4)) 1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_24|))) is different from false [2023-11-12 02:11:56,924 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1443 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_24| Int)) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1442) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_24| v_ArrVal_1443) 4)) 1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_24|))) is different from false [2023-11-12 02:11:57,133 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1443 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_24| Int)) (or (= (select (store |c_#valid| |c_ULTIMATE.start_dll_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1442) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_24| v_ArrVal_1443) 4)) 1) (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_24|))) is different from false [2023-11-12 02:11:57,328 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:57,328 INFO L351 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 61 treesize of output 65 [2023-11-12 02:11:57,747 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)))) (and (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_24| Int)) (or (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1441 (Array Int Int)) (v_ArrVal_1443 Int)) (= (select (store (select (let ((.cse0 (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1441))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1442)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_24| v_ArrVal_1443) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_24|))) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_24| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_24|) (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1441 (Array Int Int)) (v_ArrVal_1443 Int)) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (store (select (let ((.cse3 (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1441))) (store .cse3 (select (select .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1442)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_24| v_ArrVal_1443) 4)))))))) is different from false [2023-11-12 02:11:57,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:57,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 46 [2023-11-12 02:11:57,777 INFO L351 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 162 [2023-11-12 02:11:57,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2023-11-12 02:11:57,805 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:57,805 INFO L351 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 56 treesize of output 55 [2023-11-12 02:11:57,835 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:11:57,836 INFO L351 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 74 treesize of output 74 [2023-11-12 02:11:58,040 INFO L322 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-12 02:11:58,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-11-12 02:11:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-11-12 02:11:58,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286717205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:58,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:58,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 53 [2023-11-12 02:11:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434099444] [2023-11-12 02:11:58,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:58,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-12 02:11:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-12 02:11:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2099, Unknown=66, NotChecked=490, Total=2862 [2023-11-12 02:11:58,222 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:00,022 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2023-11-12 02:12:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:12:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-12 02:12:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:00,024 INFO L225 Difference]: With dead ends: 67 [2023-11-12 02:12:00,024 INFO L226 Difference]: Without dead ends: 67 [2023-11-12 02:12:00,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=463, Invalid=3780, Unknown=67, NotChecked=660, Total=4970 [2023-11-12 02:12:00,027 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:00,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 284 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 889 Invalid, 0 Unknown, 307 Unchecked, 0.8s Time] [2023-11-12 02:12:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-12 02:12:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-11-12 02:12:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.169811320754717) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-12 02:12:00,030 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 45 [2023-11-12 02:12:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:00,031 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-12 02:12:00,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-12 02:12:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 02:12:00,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:00,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:00,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:00,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:00,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:12:00,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:00,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2002912180, now seen corresponding path program 1 times [2023-11-12 02:12:00,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:00,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712845715] [2023-11-12 02:12:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:00,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:12:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712845715] [2023-11-12 02:12:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712845715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:01,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790935795] [2023-11-12 02:12:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:01,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:01,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:01,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:12:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:02,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-12 02:12:02,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:02,195 INFO L351 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 [2023-11-12 02:12:02,285 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:12:02,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:12:02,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:12:02,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:12:02,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:12:02,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:12:02,539 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:12:02,539 INFO L351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2023-11-12 02:12:02,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-12 02:12:03,218 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:12:03,219 INFO L351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2023-11-12 02:12:03,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-12 02:12:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:03,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-12 02:12:03,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:12:03,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2023-11-12 02:12:03,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:03,685 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2023-11-12 02:12:03,702 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:03,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:12:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:12:03,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:04,330 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_1575 (Array Int Int))) (or (< 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1575) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 5)) (not (= v_ArrVal_1575 (store .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.offset| (select v_ArrVal_1575 |c_ULTIMATE.start_dll_update_at_~head#1.offset|)))))) (forall ((v_ArrVal_1575 (Array Int Int))) (or (forall ((v_ArrVal_1576 Int)) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1575) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) |c_ULTIMATE.start_dll_update_at_~head#1.offset| v_ArrVal_1576)) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (not (= v_ArrVal_1575 (store .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.offset| (select v_ArrVal_1575 |c_ULTIMATE.start_dll_update_at_~head#1.offset|)))))))) is different from false [2023-11-12 02:12:05,774 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:05,774 INFO L351 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 95 treesize of output 99 [2023-11-12 02:12:05,903 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (or (forall ((v_ArrVal_1571 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1571) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) 0)) (forall ((v_prenex_7 Int) (v_ArrVal_1576 Int) (v_ArrVal_1573 (Array Int Int)) (v_ArrVal_1570 (Array Int Int))) (or (= (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1570))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) v_ArrVal_1573)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) v_prenex_7 v_ArrVal_1576) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_prenex_7)))) (forall ((v_prenex_7 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_prenex_7) (forall ((v_ArrVal_1571 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1571))) (or (forall ((v_ArrVal_1570 (Array Int Int)) (v_prenex_6 (Array Int Int)) (v_DerPreprocessor_1 Int)) (< (select (store (select (store .cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1570) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) v_prenex_6) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) v_prenex_7 v_DerPreprocessor_1) 4) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 5))) (< (select (select .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) 0)))))) (forall ((v_ArrVal_1572 (Array Int Int)) (v_ArrVal_1571 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int) (v_ArrVal_1570 (Array Int Int)) (v_DerPreprocessor_2 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1571))) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (< 0 (+ 5 (select (store (select (store .cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1570) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) v_ArrVal_1572) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_DerPreprocessor_2) 4))) (< (select (select .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) 0)))))) is different from false [2023-11-12 02:12:06,465 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:06,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 75 [2023-11-12 02:12:06,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:06,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 48 [2023-11-12 02:12:06,485 INFO L351 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 76 treesize of output 58 [2023-11-12 02:12:06,494 INFO L351 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 175 treesize of output 165 [2023-11-12 02:12:06,504 INFO L351 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 54 treesize of output 52 [2023-11-12 02:12:06,521 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:06,521 INFO L351 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 78 treesize of output 80 [2023-11-12 02:12:06,531 INFO L351 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 62 treesize of output 54 [2023-11-12 02:12:06,560 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:06,560 INFO L351 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 58 treesize of output 62 [2023-11-12 02:12:06,712 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:06,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-12 02:12:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:12:06,720 INFO L351 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 30 treesize of output 12 [2023-11-12 02:12:06,737 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:06,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 46 [2023-11-12 02:12:06,741 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:12:06,745 INFO L351 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 60 treesize of output 50 [2023-11-12 02:12:06,749 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:12:06,753 INFO L351 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 13 treesize of output 11 [2023-11-12 02:12:06,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:12:06,775 INFO L322 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-12 02:12:06,775 INFO L351 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 42 treesize of output 31 [2023-11-12 02:12:06,796 INFO L322 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-12 02:12:06,797 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 1 [2023-11-12 02:12:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-12 02:12:07,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790935795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:07,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:07,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 57 [2023-11-12 02:12:07,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504095998] [2023-11-12 02:12:07,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:07,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-12 02:12:07,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-12 02:12:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2857, Unknown=13, NotChecked=218, Total=3306 [2023-11-12 02:12:07,123 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 58 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:11,666 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2023-11-12 02:12:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:12:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 58 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-12 02:12:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:11,667 INFO L225 Difference]: With dead ends: 71 [2023-11-12 02:12:11,667 INFO L226 Difference]: Without dead ends: 71 [2023-11-12 02:12:11,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=621, Invalid=5532, Unknown=17, NotChecked=310, Total=6480 [2023-11-12 02:12:11,670 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 248 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 32 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:11,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 363 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1233 Invalid, 20 Unknown, 134 Unchecked, 1.6s Time] [2023-11-12 02:12:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-12 02:12:11,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2023-11-12 02:12:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2023-11-12 02:12:11,673 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2023-11-12 02:12:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:11,673 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2023-11-12 02:12:11,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 58 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2023-11-12 02:12:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:12:11,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:11,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:11,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:11,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:12:11,881 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:12:11,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1960736857, now seen corresponding path program 1 times [2023-11-12 02:12:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:11,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860722716] [2023-11-12 02:12:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:12:13,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860722716] [2023-11-12 02:12:13,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860722716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220907201] [2023-11-12 02:12:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:13,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:13,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:13,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:13,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:12:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:13,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-12 02:12:13,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:13,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 02:12:13,326 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:12:13,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:12:13,379 INFO L351 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 11 treesize of output 7 [2023-11-12 02:12:13,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:12:13,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:12:13,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:12:13,548 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:12:13,548 INFO L351 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 56 treesize of output 49 [2023-11-12 02:12:13,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-12 02:12:13,926 INFO L351 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 15 treesize of output 7 [2023-11-12 02:12:14,047 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:14,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-12 02:12:14,177 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:14,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-12 02:12:14,315 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:14,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-12 02:12:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:14,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:15,298 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 Int) (v_ArrVal_1702 (Array Int Int)) (v_ArrVal_1701 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.base_39| Int) (v_ArrVal_1703 Int)) (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1701))) (store .cse0 |v_ULTIMATE.start_dll_update_at_~head#1.base_39| (store (select .cse0 |v_ULTIMATE.start_dll_update_at_~head#1.base_39|) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1702) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1703))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_ArrVal_1705) 4) 0))) is different from false [2023-11-12 02:12:15,313 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 Int) (v_ArrVal_1702 (Array Int Int)) (v_ArrVal_1701 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.base_39| Int) (v_ArrVal_1703 Int)) (not (= (select (store (select (let ((.cse1 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1701))) (store .cse0 |v_ULTIMATE.start_dll_update_at_~head#1.base_39| (store (select .cse0 |v_ULTIMATE.start_dll_update_at_~head#1.base_39|) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1702) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1703)))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| v_ArrVal_1705) 4) 0))) is different from false [2023-11-12 02:12:15,328 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:15,328 INFO L351 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 2 case distinctions, treesize of input 79 treesize of output 70 [2023-11-12 02:12:15,338 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:15,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 55 [2023-11-12 02:12:15,343 INFO L351 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 91 treesize of output 73 [2023-11-12 02:12:15,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:15,369 INFO L351 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 371 treesize of output 359 [2023-11-12 02:12:15,390 INFO L351 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 260 treesize of output 252 [2023-11-12 02:12:15,409 INFO L351 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 252 treesize of output 240 [2023-11-12 02:12:15,527 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:12:15,527 INFO L351 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 88 treesize of output 94 [2023-11-12 02:12:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-12 02:12:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220907201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:15,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 56 [2023-11-12 02:12:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33063414] [2023-11-12 02:12:15,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-12 02:12:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-12 02:12:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2644, Unknown=2, NotChecked=210, Total=3080 [2023-11-12 02:12:15,828 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:18,192 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2023-11-12 02:12:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:12:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-12 02:12:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:18,194 INFO L225 Difference]: With dead ends: 70 [2023-11-12 02:12:18,194 INFO L226 Difference]: Without dead ends: 70 [2023-11-12 02:12:18,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=573, Invalid=4689, Unknown=2, NotChecked=286, Total=5550 [2023-11-12 02:12:18,197 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 218 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:18,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 460 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1057 Invalid, 0 Unknown, 130 Unchecked, 0.8s Time] [2023-11-12 02:12:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-12 02:12:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2023-11-12 02:12:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-11-12 02:12:18,200 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2023-11-12 02:12:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:18,200 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-11-12 02:12:18,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-11-12 02:12:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:12:18,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:18,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:18,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:18,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-12 02:12:18,408 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-12 02:12:18,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:18,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1223965472, now seen corresponding path program 1 times [2023-11-12 02:12:18,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:18,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645753067] [2023-11-12 02:12:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:18,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:12:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645753067] [2023-11-12 02:12:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645753067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145217990] [2023-11-12 02:12:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:19,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:19,744 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:19,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355d9e8f-f4dc-4623-86da-3e7d1b588752/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:12:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:19,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-12 02:12:19,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:19,974 INFO L351 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 [2023-11-12 02:12:20,052 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:12:20,052 INFO L351 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 [2023-11-12 02:12:20,102 INFO L351 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 11 treesize of output 7 [2023-11-12 02:12:20,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:12:20,219 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:12:20,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38