./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_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_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/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_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/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_8c41d6b3-e41f-476e-94da-94f65e123e96/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 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:22:23,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:22:23,204 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:22:23,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:22:23,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:22:23,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:22:23,252 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:22:23,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:22:23,254 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:22:23,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:22:23,261 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:22:23,261 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:22:23,262 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:22:23,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:22:23,264 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:22:23,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:22:23,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:22:23,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:22:23,266 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:22:23,266 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:22:23,267 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:22:23,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:22:23,268 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:22:23,268 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:22:23,269 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:22:23,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:22:23,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:22:23,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:22:23,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:22:23,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:23,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:22:23,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:22:23,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:22:23,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:22:23,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:22:23,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:22:23,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:22:23,276 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:22:23,276 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_8c41d6b3-e41f-476e-94da-94f65e123e96/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 [2023-11-12 02:22:23,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:22:23,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:22:23,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:22:23,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:22:23,619 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:22:23,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2023-11-12 02:22:26,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:27,157 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:27,158 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2023-11-12 02:22:27,192 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/data/dd1230108/1bd5b40586424df5b41824981613e3ec/FLAG7a4ee40b0 [2023-11-12 02:22:27,218 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/data/dd1230108/1bd5b40586424df5b41824981613e3ec [2023-11-12 02:22:27,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:27,224 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:27,225 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:27,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:27,234 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:27,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6c8dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27, skipping insertion in model container [2023-11-12 02:22:27,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,310 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:27,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:27,632 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:27,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:27,750 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:27,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27 WrapperNode [2023-11-12 02:22:27,751 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:27,752 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:27,752 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:27,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:27,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,802 INFO L138 Inliner]: procedures = 126, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 127 [2023-11-12 02:22:27,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:27,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:27,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:27,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:27,814 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,819 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:27,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:27,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:27,863 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:27,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (1/1) ... [2023-11-12 02:22:27,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:27,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:27,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:22:27,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:22:27,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:22:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:27,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:22:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:22:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:22:27,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:27,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:27,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:28,126 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:28,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:28,457 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:28,464 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:28,464 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:22:28,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:28 BoogieIcfgContainer [2023-11-12 02:22:28,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:28,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:28,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:28,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:28,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:27" (1/3) ... [2023-11-12 02:22:28,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89a6f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:28, skipping insertion in model container [2023-11-12 02:22:28,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:27" (2/3) ... [2023-11-12 02:22:28,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89a6f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:28, skipping insertion in model container [2023-11-12 02:22:28,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:28" (3/3) ... [2023-11-12 02:22:28,476 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2023-11-12 02:22:28,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:28,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-12 02:22:28,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:28,543 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;@f06a390, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:28,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-12 02:22:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 45 states have (on average 1.8) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 02:22:28,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:28,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:22:28,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:28,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 28698858, now seen corresponding path program 1 times [2023-11-12 02:22:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824113035] [2023-11-12 02:22:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:28,795 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 02:22:28,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824113035] [2023-11-12 02:22:28,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824113035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:28,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:28,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601585148] [2023-11-12 02:22:28,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:28,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:28,834 INFO L87 Difference]: Start difference. First operand has 67 states, 45 states have (on average 1.8) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 02:22:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:28,901 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-12 02:22:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:28,903 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 02:22:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:28,911 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:22:28,912 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 02:22:28,913 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 02:22:28,917 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:28,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 02:22:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-12 02:22:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-11-12 02:22:28,955 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 5 [2023-11-12 02:22:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:28,955 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-11-12 02:22:28,956 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 02:22:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-11-12 02:22:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 02:22:28,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:28,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:22:28,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:22:28,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:28,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash 28698859, now seen corresponding path program 1 times [2023-11-12 02:22:28,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:28,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143489214] [2023-11-12 02:22:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:29,170 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 02:22:29,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143489214] [2023-11-12 02:22:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143489214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:29,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:29,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:29,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741765305] [2023-11-12 02:22:29,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:29,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:29,175 INFO L87 Difference]: Start difference. First operand 61 states and 66 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 02:22:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:29,218 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-11-12 02:22:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:29,218 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 02:22:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:29,220 INFO L225 Difference]: With dead ends: 59 [2023-11-12 02:22:29,220 INFO L226 Difference]: Without dead ends: 59 [2023-11-12 02:22:29,222 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 02:22:29,226 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:29,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-12 02:22:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-12 02:22:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 58 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 02:22:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2023-11-12 02:22:29,237 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 5 [2023-11-12 02:22:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:29,237 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2023-11-12 02:22:29,237 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 02:22:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2023-11-12 02:22:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:22:29,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:29,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:22:29,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:29,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash 231010834, now seen corresponding path program 1 times [2023-11-12 02:22:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893285821] [2023-11-12 02:22:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:29,338 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 02:22:29,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:29,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893285821] [2023-11-12 02:22:29,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893285821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:29,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:29,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:29,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793429099] [2023-11-12 02:22:29,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:29,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:29,345 INFO L87 Difference]: Start difference. First operand 59 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 02:22:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:29,381 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-11-12 02:22:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:29,382 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 02:22:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:29,383 INFO L225 Difference]: With dead ends: 70 [2023-11-12 02:22:29,383 INFO L226 Difference]: Without dead ends: 70 [2023-11-12 02:22:29,384 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 02:22:29,385 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 02:22:29,386 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 02:22:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-12 02:22:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2023-11-12 02:22:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 59 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 02:22:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2023-11-12 02:22:29,393 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 8 [2023-11-12 02:22:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:29,393 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2023-11-12 02:22:29,394 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 02:22:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-11-12 02:22:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 02:22:29,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:29,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:29,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:22:29,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:29,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash -245418610, now seen corresponding path program 1 times [2023-11-12 02:22:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:29,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107581708] [2023-11-12 02:22:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:29,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:29,531 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 02:22:29,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:29,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107581708] [2023-11-12 02:22:29,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107581708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:29,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:29,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:29,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48306555] [2023-11-12 02:22:29,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:29,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:29,535 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:29,674 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-11-12 02:22:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:29,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 02:22:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:29,676 INFO L225 Difference]: With dead ends: 78 [2023-11-12 02:22:29,676 INFO L226 Difference]: Without dead ends: 78 [2023-11-12 02:22:29,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:29,678 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:29,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 125 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-12 02:22:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2023-11-12 02:22:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 58 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 02:22:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2023-11-12 02:22:29,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 9 [2023-11-12 02:22:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:29,686 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2023-11-12 02:22:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2023-11-12 02:22:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 02:22:29,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:29,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:29,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:22:29,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:29,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -245418609, now seen corresponding path program 1 times [2023-11-12 02:22:29,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219485662] [2023-11-12 02:22:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:29,902 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 02:22:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219485662] [2023-11-12 02:22:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219485662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:29,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:29,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952100503] [2023-11-12 02:22:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:29,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:29,906 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:30,033 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-11-12 02:22:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 02:22:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:30,036 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:22:30,036 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:22:30,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:30,043 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:30,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:22:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2023-11-12 02:22:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 57 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 02:22:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-11-12 02:22:30,061 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 9 [2023-11-12 02:22:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:30,062 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-11-12 02:22:30,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-11-12 02:22:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:22:30,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:30,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:30,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:22:30,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:30,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash -806744226, now seen corresponding path program 1 times [2023-11-12 02:22:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:30,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493394539] [2023-11-12 02:22:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:30,191 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 02:22:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493394539] [2023-11-12 02:22:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493394539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121752465] [2023-11-12 02:22:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:30,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:30,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:30,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:30,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:22:30,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:30,403 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 02:22:30,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:30,449 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 02:22:30,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121752465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:30,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:30,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-12 02:22:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822106662] [2023-11-12 02:22:30,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:30,457 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:30,483 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-11-12 02:22:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:30,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 02:22:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:30,493 INFO L225 Difference]: With dead ends: 67 [2023-11-12 02:22:30,493 INFO L226 Difference]: Without dead ends: 67 [2023-11-12 02:22:30,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 02:22:30,494 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 8 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 174 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 02:22:30,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 174 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-12 02:22:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-12 02:22:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 66 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 02:22:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2023-11-12 02:22:30,507 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 17 [2023-11-12 02:22:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:30,507 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2023-11-12 02:22:30,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2023-11-12 02:22:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:22:30,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:30,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:30,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:22:30,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:30,715 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:30,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2130913170, now seen corresponding path program 2 times [2023-11-12 02:22:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:30,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048812548] [2023-11-12 02:22:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:30,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048812548] [2023-11-12 02:22:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048812548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:30,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:30,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472686077] [2023-11-12 02:22:30,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:30,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:30,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:30,938 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:31,220 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2023-11-12 02:22:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:22:31,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:22:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:31,221 INFO L225 Difference]: With dead ends: 86 [2023-11-12 02:22:31,222 INFO L226 Difference]: Without dead ends: 86 [2023-11-12 02:22:31,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:22:31,223 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:31,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 188 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:22:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-12 02:22:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2023-11-12 02:22:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 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 02:22:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-11-12 02:22:31,229 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 26 [2023-11-12 02:22:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:31,229 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-11-12 02:22:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-11-12 02:22:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:22:31,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:31,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:22:31,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:31,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2130913171, now seen corresponding path program 1 times [2023-11-12 02:22:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451850770] [2023-11-12 02:22:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451850770] [2023-11-12 02:22:31,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451850770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687530775] [2023-11-12 02:22:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:31,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:31,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:31,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:31,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:22:31,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:22:31,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:31,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687530775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:31,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:22:31,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2023-11-12 02:22:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506671217] [2023-11-12 02:22:31,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:31,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:31,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:31,682 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:31,733 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2023-11-12 02:22:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:22:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:31,735 INFO L225 Difference]: With dead ends: 100 [2023-11-12 02:22:31,735 INFO L226 Difference]: Without dead ends: 100 [2023-11-12 02:22:31,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 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 02:22:31,739 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 116 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:31,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 156 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-12 02:22:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2023-11-12 02:22:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.396551724137931) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2023-11-12 02:22:31,751 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 26 [2023-11-12 02:22:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:31,752 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2023-11-12 02:22:31,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2023-11-12 02:22:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 02:22:31,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:31,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:31,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:31,963 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2130913226, now seen corresponding path program 1 times [2023-11-12 02:22:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930120643] [2023-11-12 02:22:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:32,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930120643] [2023-11-12 02:22:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930120643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860647104] [2023-11-12 02:22:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:32,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:32,340 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:32,650 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2023-11-12 02:22:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:22:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 02:22:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:32,652 INFO L225 Difference]: With dead ends: 75 [2023-11-12 02:22:32,652 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 02:22:32,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:22:32,653 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 179 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:32,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 195 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 02:22:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-11-12 02:22:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 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 02:22:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-11-12 02:22:32,657 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 26 [2023-11-12 02:22:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:32,658 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-11-12 02:22:32,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-11-12 02:22:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 02:22:32,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:32,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:32,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:22:32,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:32,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1875687586, now seen corresponding path program 1 times [2023-11-12 02:22:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:32,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460630192] [2023-11-12 02:22:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:33,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:33,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460630192] [2023-11-12 02:22:33,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460630192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:33,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59502148] [2023-11-12 02:22:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:33,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:33,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:33,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:33,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-12 02:22:33,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:33,685 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:22:33,685 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 14 treesize of output 13 [2023-11-12 02:22:33,819 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:22:34,025 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 21 treesize of output 9 [2023-11-12 02:22:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:34,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:34,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59502148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:34,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:34,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 31 [2023-11-12 02:22:34,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76548117] [2023-11-12 02:22:34,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:34,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:22:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:22:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:22:34,404 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 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 02:22:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:35,482 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2023-11-12 02:22:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:22:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 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 29 [2023-11-12 02:22:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:35,486 INFO L225 Difference]: With dead ends: 107 [2023-11-12 02:22:35,486 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 02:22:35,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=1997, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 02:22:35,488 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 187 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:35,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 678 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:22:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 02:22:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-11-12 02:22:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.380952380952381) internal successors, (87), 77 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-11-12 02:22:35,497 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 29 [2023-11-12 02:22:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-11-12 02:22:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 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 02:22:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-11-12 02:22:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 02:22:35,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:35,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:35,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:35,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:22:35,713 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:35,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1875687585, now seen corresponding path program 1 times [2023-11-12 02:22:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:35,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677722694] [2023-11-12 02:22:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:36,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:36,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677722694] [2023-11-12 02:22:36,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677722694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152022508] [2023-11-12 02:22:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:36,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:36,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:36,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:36,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-12 02:22:36,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:36,844 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 02:22:36,851 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 02:22:37,052 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:22:37,052 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 02:22:37,059 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 02:22:37,202 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 19 treesize of output 1 [2023-11-12 02:22:37,210 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 02:22:37,493 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 31 treesize of output 13 [2023-11-12 02:22:37,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-12 02:22:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:37,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152022508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:38,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 42 [2023-11-12 02:22:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698349931] [2023-11-12 02:22:38,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-12 02:22:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-12 02:22:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1686, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 02:22:38,651 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:22:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:41,272 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2023-11-12 02:22:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:22:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 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 29 [2023-11-12 02:22:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:41,274 INFO L225 Difference]: With dead ends: 169 [2023-11-12 02:22:41,274 INFO L226 Difference]: Without dead ends: 169 [2023-11-12 02:22:41,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=497, Invalid=3535, Unknown=0, NotChecked=0, Total=4032 [2023-11-12 02:22:41,277 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 744 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:41,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 736 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:22:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-12 02:22:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2023-11-12 02:22:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.380281690140845) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 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 02:22:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-11-12 02:22:41,281 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 29 [2023-11-12 02:22:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:41,281 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-11-12 02:22:41,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:22:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-11-12 02:22:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 02:22:41,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:41,282 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] [2023-11-12 02:22:41,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:41,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:41,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:41,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1082686446, now seen corresponding path program 2 times [2023-11-12 02:22:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963943340] [2023-11-12 02:22:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963943340] [2023-11-12 02:22:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963943340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20754340] [2023-11-12 02:22:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:22:41,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:41,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:41,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:41,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:22:41,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:22:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:41,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:41,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:22:41,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:41,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20754340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:41,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:22:41,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2023-11-12 02:22:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438038433] [2023-11-12 02:22:41,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:41,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:41,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:41,842 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 02:22:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:41,884 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2023-11-12 02:22:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 32 [2023-11-12 02:22:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:41,885 INFO L225 Difference]: With dead ends: 72 [2023-11-12 02:22:41,886 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 02:22:41,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 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 02:22:41,887 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 97 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:41,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 106 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 02:22:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-12 02:22:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 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 02:22:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-11-12 02:22:41,891 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 32 [2023-11-12 02:22:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:41,891 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-11-12 02:22:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 02:22:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-11-12 02:22:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 02:22:41,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:41,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:41,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:42,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:42,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:42,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:42,101 INFO L85 PathProgramCache]: Analyzing trace with hash -516260032, now seen corresponding path program 1 times [2023-11-12 02:22:42,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:42,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825119971] [2023-11-12 02:22:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:42,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:22:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825119971] [2023-11-12 02:22:42,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825119971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:42,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:42,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:42,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278771786] [2023-11-12 02:22:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:42,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:42,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:42,291 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 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 02:22:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:42,521 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-11-12 02:22:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:22:42,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 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 36 [2023-11-12 02:22:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:42,523 INFO L225 Difference]: With dead ends: 91 [2023-11-12 02:22:42,523 INFO L226 Difference]: Without dead ends: 91 [2023-11-12 02:22:42,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:22:42,525 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 170 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:42,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 177 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-12 02:22:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-11-12 02:22:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 74 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:22:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-11-12 02:22:42,530 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 36 [2023-11-12 02:22:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:42,530 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-11-12 02:22:42,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 9 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 02:22:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-11-12 02:22:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 02:22:42,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:42,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:42,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:22:42,533 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:42,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -516260031, now seen corresponding path program 1 times [2023-11-12 02:22:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841432891] [2023-11-12 02:22:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:22:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841432891] [2023-11-12 02:22:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841432891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294537854] [2023-11-12 02:22:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:42,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:42,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:42,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:22:42,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:22:42,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:22:42,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294537854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:42,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-12 02:22:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198216537] [2023-11-12 02:22:42,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:22:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:42,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:22:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:42,913 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:42,968 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2023-11-12 02:22:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:22:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-12 02:22:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:42,970 INFO L225 Difference]: With dead ends: 99 [2023-11-12 02:22:42,970 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 02:22:42,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 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 02:22:42,971 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 119 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:42,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 166 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 02:22:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2023-11-12 02:22:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 90 states have internal predecessors, (108), 0 states have call successors, (0), 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 02:22:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-11-12 02:22:42,975 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 36 [2023-11-12 02:22:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:42,977 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-11-12 02:22:42,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-11-12 02:22:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 02:22:42,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:42,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:42,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:43,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:43,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:43,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1215669110, now seen corresponding path program 1 times [2023-11-12 02:22:43,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:43,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919575698] [2023-11-12 02:22:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:43,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919575698] [2023-11-12 02:22:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919575698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054758613] [2023-11-12 02:22:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:43,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:43,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:43,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:43,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:22:43,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:22:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054758613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:43,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:43,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-12 02:22:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761159106] [2023-11-12 02:22:43,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:43,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:22:43,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:22:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:43,605 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:43,679 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-11-12 02:22:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-12 02:22:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:43,681 INFO L225 Difference]: With dead ends: 94 [2023-11-12 02:22:43,681 INFO L226 Difference]: Without dead ends: 94 [2023-11-12 02:22:43,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:22:43,683 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 118 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:43,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 221 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-12 02:22:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2023-11-12 02:22:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.36) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:43,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2023-11-12 02:22:43,689 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 37 [2023-11-12 02:22:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:43,689 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2023-11-12 02:22:43,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2023-11-12 02:22:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:22:43,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:43,691 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:22:43,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:43,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:43,897 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:43,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:43,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1972522149, now seen corresponding path program 2 times [2023-11-12 02:22:43,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:43,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944878390] [2023-11-12 02:22:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:22:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944878390] [2023-11-12 02:22:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944878390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:44,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27120134] [2023-11-12 02:22:44,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:22:44,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:44,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:44,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:44,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:22:44,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:22:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:44,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:22:44,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:22:44,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:44,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27120134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:44,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:22:44,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2023-11-12 02:22:44,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608013346] [2023-11-12 02:22:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:44,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:44,268 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:44,312 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2023-11-12 02:22:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:22:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-12 02:22:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:44,313 INFO L225 Difference]: With dead ends: 93 [2023-11-12 02:22:44,313 INFO L226 Difference]: Without dead ends: 93 [2023-11-12 02:22:44,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 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 02:22:44,314 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 86 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:44,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 141 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-12 02:22:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2023-11-12 02:22:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.337837837837838) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 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 02:22:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-11-12 02:22:44,320 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 41 [2023-11-12 02:22:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:44,320 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-11-12 02:22:44,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-11-12 02:22:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:22:44,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:44,322 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:22:44,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:44,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:44,528 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:44,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:44,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1972522204, now seen corresponding path program 1 times [2023-11-12 02:22:44,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:44,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087356778] [2023-11-12 02:22:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:44,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:22:44,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:44,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087356778] [2023-11-12 02:22:44,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087356778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:44,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:44,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:22:44,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707346579] [2023-11-12 02:22:44,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:44,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:44,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:44,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:44,839 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 02:22:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:45,135 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-11-12 02:22:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:22:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-12 02:22:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:45,137 INFO L225 Difference]: With dead ends: 89 [2023-11-12 02:22:45,137 INFO L226 Difference]: Without dead ends: 89 [2023-11-12 02:22:45,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:22:45,138 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:45,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 189 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:22:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-12 02:22:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-11-12 02:22:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 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 02:22:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-11-12 02:22:45,141 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 41 [2023-11-12 02:22:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:45,142 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-11-12 02:22:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 02:22:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-11-12 02:22:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:22:45,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:45,142 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:22:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:22:45,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:45,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash -333530929, now seen corresponding path program 1 times [2023-11-12 02:22:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804494656] [2023-11-12 02:22:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804494656] [2023-11-12 02:22:46,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804494656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239770546] [2023-11-12 02:22:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:46,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:46,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:46,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:46,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:22:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:46,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-12 02:22:46,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:46,615 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 02:22:46,634 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:22:46,634 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 02:22:46,824 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 19 treesize of output 1 [2023-11-12 02:22:47,143 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 9 [2023-11-12 02:22:47,391 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-12 02:22:47,391 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 42 treesize of output 41 [2023-11-12 02:22:47,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:22:47,563 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 33 treesize of output 17 [2023-11-12 02:22:47,662 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 25 treesize of output 13 [2023-11-12 02:22:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:47,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:47,771 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_977 (Array Int Int))) (or (not (= v_ArrVal_977 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_977 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_977) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1))) is different from false [2023-11-12 02:22:47,917 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_976 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_976) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2023-11-12 02:22:48,520 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:48,520 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 2 case distinctions, treesize of input 35 treesize of output 35 [2023-11-12 02:22:48,546 INFO L322 Elim1Store]: treesize reduction 14, result has 65.0 percent of original size [2023-11-12 02:22:48,547 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 2 case distinctions, treesize of input 53 treesize of output 63 [2023-11-12 02:22:48,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:48,559 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 95 treesize of output 79 [2023-11-12 02:22:48,567 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 58 treesize of output 50 [2023-11-12 02:22:49,539 INFO L322 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-11-12 02:22:49,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 1 [2023-11-12 02:22:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-11-12 02:22:49,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239770546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:49,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:49,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 49 [2023-11-12 02:22:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020311705] [2023-11-12 02:22:49,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:49,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-12 02:22:49,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-12 02:22:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2105, Unknown=11, NotChecked=186, Total=2450 [2023-11-12 02:22:49,546 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 50 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 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 02:22:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:52,538 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2023-11-12 02:22:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 02:22:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 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 44 [2023-11-12 02:22:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:52,540 INFO L225 Difference]: With dead ends: 118 [2023-11-12 02:22:52,540 INFO L226 Difference]: Without dead ends: 118 [2023-11-12 02:22:52,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=526, Invalid=4727, Unknown=11, NotChecked=286, Total=5550 [2023-11-12 02:22:52,543 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 359 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:52,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1017 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1318 Invalid, 0 Unknown, 207 Unchecked, 1.2s Time] [2023-11-12 02:22:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-12 02:22:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2023-11-12 02:22:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 92 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:22:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2023-11-12 02:22:52,546 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 44 [2023-11-12 02:22:52,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:52,547 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2023-11-12 02:22:52,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 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 02:22:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2023-11-12 02:22:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:22:52,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:52,548 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 02:22:52,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:52,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:22:52,749 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:52,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -333530928, now seen corresponding path program 1 times [2023-11-12 02:22:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:52,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26259397] [2023-11-12 02:22:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:54,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26259397] [2023-11-12 02:22:54,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26259397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:54,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337267663] [2023-11-12 02:22:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:54,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:54,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:54,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:54,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:22:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:54,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-12 02:22:54,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:54,533 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:22:54,533 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 02:22:54,648 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 19 treesize of output 1 [2023-11-12 02:22:54,654 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:22:55,019 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-12 02:22:55,019 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 70 treesize of output 65 [2023-11-12 02:22:55,026 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 49 treesize of output 30 [2023-11-12 02:22:55,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:22:55,189 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 45 treesize of output 27 [2023-11-12 02:22:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:22:55,196 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 44 treesize of output 26 [2023-11-12 02:22:55,312 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 39 treesize of output 21 [2023-11-12 02:22:55,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-12 02:22:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:22:55,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:55,571 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1088 Int)) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1088)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (forall ((v_ArrVal_1089 (Array Int Int))) (or (forall ((v_ArrVal_1088 Int)) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1088)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1089) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1089 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1089)))))) is different from false [2023-11-12 02:22:55,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:22:55,801 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 02:22:55,837 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_prenex_4 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_prenex_4) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 1))) (forall ((v_ArrVal_1085 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1085) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1086) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.base|)))) is different from false [2023-11-12 02:22:55,866 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_prenex_4 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_prenex_4) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) (+ |c_ULTIMATE.start_sll_update_at_#t~mem10#1.offset| 1))) (forall ((v_ArrVal_1085 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1085) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1086) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base|)))) is different from false [2023-11-12 02:22:56,073 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1085 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1085) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1086) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) .cse0)) (forall ((v_prenex_4 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_4) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) 1)))))) is different from false [2023-11-12 02:22:56,089 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_#res#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_#res#1.base|) .cse1))) (and (forall ((v_prenex_4 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_4) |c_ULTIMATE.start_sll_create_#res#1.base|) .cse1) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_#res#1.base|) .cse1) 1))) (forall ((v_ArrVal_1086 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1086) |c_ULTIMATE.start_sll_create_#res#1.base|) .cse1) .cse0)) (forall ((v_ArrVal_1085 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1085) |c_ULTIMATE.start_sll_create_#res#1.base|) .cse1)))))) is different from false [2023-11-12 02:22:56,430 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:22:56,431 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 13 treesize of output 12 [2023-11-12 02:22:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2023-11-12 02:22:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337267663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:56,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:56,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 51 [2023-11-12 02:22:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417631994] [2023-11-12 02:22:56,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:56,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-12 02:22:56,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-12 02:22:56,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2009, Unknown=24, NotChecked=470, Total=2652 [2023-11-12 02:22:56,514 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 52 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:22:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:59,353 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2023-11-12 02:22:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:22:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 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 44 [2023-11-12 02:22:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:59,354 INFO L225 Difference]: With dead ends: 123 [2023-11-12 02:22:59,354 INFO L226 Difference]: Without dead ends: 123 [2023-11-12 02:22:59,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=559, Invalid=4837, Unknown=26, NotChecked=740, Total=6162 [2023-11-12 02:22:59,358 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 339 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:59,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 977 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1311 Invalid, 0 Unknown, 525 Unchecked, 1.0s Time] [2023-11-12 02:22:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-12 02:22:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2023-11-12 02:22:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:22:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2023-11-12 02:22:59,362 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 44 [2023-11-12 02:22:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:59,362 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2023-11-12 02:22:59,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:22:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2023-11-12 02:22:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:22:59,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:59,364 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] [2023-11-12 02:22:59,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:59,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:59,570 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:22:59,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash -333530873, now seen corresponding path program 1 times [2023-11-12 02:22:59,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:59,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298707131] [2023-11-12 02:22:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:22:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298707131] [2023-11-12 02:22:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298707131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435584388] [2023-11-12 02:22:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:59,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:59,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:22:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:59,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:59,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:23:00,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:00,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435584388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:00,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:00,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2023-11-12 02:23:00,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14626956] [2023-11-12 02:23:00,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:00,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:23:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:23:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:23:00,006 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:00,051 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-11-12 02:23:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:23:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-12 02:23:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:00,053 INFO L225 Difference]: With dead ends: 78 [2023-11-12 02:23:00,053 INFO L226 Difference]: Without dead ends: 78 [2023-11-12 02:23:00,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 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 02:23:00,055 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 77 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:00,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 96 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:23:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-12 02:23:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-12 02:23:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 77 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:23:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2023-11-12 02:23:00,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 44 [2023-11-12 02:23:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:00,063 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2023-11-12 02:23:00,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:23:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2023-11-12 02:23:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 02:23:00,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:00,064 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-12 02:23:00,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:00,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:00,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:23:00,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1682989806, now seen corresponding path program 1 times [2023-11-12 02:23:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:00,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554761553] [2023-11-12 02:23:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:23:02,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:02,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554761553] [2023-11-12 02:23:02,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554761553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:02,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315741734] [2023-11-12 02:23:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:02,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:02,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:02,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:02,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:23:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:02,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-12 02:23:02,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:02,637 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 02:23:02,807 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:23:02,808 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 02:23:02,965 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 15 treesize of output 1 [2023-11-12 02:23:02,973 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:23:03,462 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:23:03,462 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 64 treesize of output 57 [2023-11-12 02:23:03,467 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 23 treesize of output 15 [2023-11-12 02:23:03,471 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 32 treesize of output 19 [2023-11-12 02:23:03,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:23:03,705 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 39 treesize of output 23 [2023-11-12 02:23:03,718 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 24 treesize of output 19 [2023-11-12 02:23:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:23:03,724 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 31 treesize of output 19 [2023-11-12 02:23:03,936 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 31 treesize of output 19 [2023-11-12 02:23:03,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-12 02:23:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:23:04,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:04,394 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int)) (v_ArrVal_1308 (Array Int Int)) (v_ArrVal_1306 Int)) (or (= (* |c_ULTIMATE.start_main_~len~0#1| 2) (+ (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1308) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1306)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) 1)) (not (= v_ArrVal_1309 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1309 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))))) is different from false [2023-11-12 02:23:04,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:23:04,623 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 1 case distinctions, treesize of input 46 treesize of output 47 [2023-11-12 02:23:04,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:23:04,636 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 98 treesize of output 101 [2023-11-12 02:23:04,645 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 37 treesize of output 23 [2023-11-12 02:23:04,720 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (= (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1305) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1305) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse0) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1302 (Array Int Int)) (v_ArrVal_1306 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1302) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_ArrVal_1306) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))))) is different from false [2023-11-12 02:23:04,797 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1305) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse0))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1302 (Array Int Int)) (v_ArrVal_1306 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1302) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_ArrVal_1306) .cse0) |c_ULTIMATE.start_sll_update_at_#t~mem10#1.offset|)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (= (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1305) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse0)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))))) is different from false [2023-11-12 02:23:04,839 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse2)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (= (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1305) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1302 (Array Int Int)) (v_ArrVal_1306 Int)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse2) (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1302) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_ArrVal_1306) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1305) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse1) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|)))))) is different from false [2023-11-12 02:23:05,655 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1305) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse1))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1302 (Array Int Int)) (v_ArrVal_1306 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1302) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_ArrVal_1306) .cse1) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_33| Int)) (or (forall ((v_ArrVal_1305 (Array Int Int)) (v_DerPreprocessor_4 Int)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1305) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_33| v_DerPreprocessor_4) .cse1)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_33|)))))) is different from false [2023-11-12 02:23:06,128 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:23:06,128 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 1 case distinctions, treesize of input 25 treesize of output 26 [2023-11-12 02:23:06,132 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 44 treesize of output 38 [2023-11-12 02:23:06,135 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:23:06,137 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 15 treesize of output 11 [2023-11-12 02:23:06,144 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:23:06,146 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 16 treesize of output 12 [2023-11-12 02:23:06,154 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-12 02:23:06,155 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 1 case distinctions, treesize of input 25 treesize of output 1 [2023-11-12 02:23:06,161 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-12 02:23:06,161 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 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-12 02:23:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-11-12 02:23:06,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315741734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:06,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:23:06,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 73 [2023-11-12 02:23:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910062256] [2023-11-12 02:23:06,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-12 02:23:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-12 02:23:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4264, Unknown=64, NotChecked=680, Total=5256 [2023-11-12 02:23:06,558 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 73 states have internal predecessors, (134), 0 states have call successors, (0), 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 02:23:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:10,151 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2023-11-12 02:23:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 02:23:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 73 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-12 02:23:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:10,157 INFO L225 Difference]: With dead ends: 99 [2023-11-12 02:23:10,157 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 02:23:10,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=814, Invalid=9239, Unknown=67, NotChecked=1010, Total=11130 [2023-11-12 02:23:10,163 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 376 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 2402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:10,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 935 Invalid, 2402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1897 Invalid, 0 Unknown, 490 Unchecked, 1.4s Time] [2023-11-12 02:23:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 02:23:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2023-11-12 02:23:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 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 02:23:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-11-12 02:23:10,167 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 50 [2023-11-12 02:23:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:10,167 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-11-12 02:23:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 73 states have internal predecessors, (134), 0 states have call successors, (0), 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 02:23:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-11-12 02:23:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 02:23:10,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:10,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2023-11-12 02:23:10,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-12 02:23:10,369 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-12 02:23:10,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash -375253395, now seen corresponding path program 1 times [2023-11-12 02:23:10,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:10,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810376328] [2023-11-12 02:23:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:23:10,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:10,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810376328] [2023-11-12 02:23:10,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810376328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:10,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400706639] [2023-11-12 02:23:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:10,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:10,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:10,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:10,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c41d6b3-e41f-476e-94da-94f65e123e96/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:23:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:11,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-12 02:23:11,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:11,477 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:23:11,738 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:23:11,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:23:11,741 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 15 treesize of output 10 [2023-11-12 02:23:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:23:11,815 INFO L327 TraceCheckSpWp]: Computing backward predicates...