./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3b4637ab5710a1ca22a981e8047278048fbbf856825d3649b2cb9d48de11d175 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:13,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:14,069 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:14,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:14,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:14,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:14,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:14,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:14,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:14,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:14,108 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:14,108 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:14,109 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:14,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:14,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:14,111 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:14,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:14,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:14,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:14,113 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:14,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:14,114 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:14,115 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:14,115 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:14,116 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:14,116 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:14,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:14,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:14,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:14,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:14,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:14,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:14,119 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:14,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:14,120 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:14,121 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:14,121 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:14,121 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:14,121 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:14,122 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_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b4637ab5710a1ca22a981e8047278048fbbf856825d3649b2cb9d48de11d175 [2023-11-19 07:41:14,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:14,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:14,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:14,392 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:14,392 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:14,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-11-19 07:41:17,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:17,844 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:17,845 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-11-19 07:41:17,859 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/data/c6b0d79eb/cca9627c65f6458e8a2fa56c8e02ea3c/FLAG9b629c8e9 [2023-11-19 07:41:17,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/data/c6b0d79eb/cca9627c65f6458e8a2fa56c8e02ea3c [2023-11-19 07:41:17,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:17,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:17,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:17,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:17,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:17,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:17" (1/1) ... [2023-11-19 07:41:17,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264c0e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:17, skipping insertion in model container [2023-11-19 07:41:17,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:17" (1/1) ... [2023-11-19 07:41:17,933 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:18,273 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i[23974,23987] [2023-11-19 07:41:18,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:18,293 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:18,360 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i[23974,23987] [2023-11-19 07:41:18,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:18,398 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:18,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18 WrapperNode [2023-11-19 07:41:18,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:18,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:18,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:18,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:18,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,435 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,467 INFO L138 Inliner]: procedures = 122, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 109 [2023-11-19 07:41:18,468 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:18,469 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:18,469 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:18,469 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:18,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:18,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:18,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:18,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:18,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (1/1) ... [2023-11-19 07:41:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:18,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:18,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:18,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:41:18,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:18,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:41:18,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:18,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:41:18,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:41:18,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:18,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:18,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:18,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:18,734 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:18,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:18,957 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:18,969 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:18,972 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:41:18,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:18 BoogieIcfgContainer [2023-11-19 07:41:18,976 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:18,981 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:18,982 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:18,985 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:18,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:17" (1/3) ... [2023-11-19 07:41:18,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c762406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:18, skipping insertion in model container [2023-11-19 07:41:18,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:18" (2/3) ... [2023-11-19 07:41:18,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c762406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:18, skipping insertion in model container [2023-11-19 07:41:18,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:18" (3/3) ... [2023-11-19 07:41:18,989 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-2.i [2023-11-19 07:41:19,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:19,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:19,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:19,061 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@89a05dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:19,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:41:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:41:19,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:19,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:19,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:19,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -91270904, now seen corresponding path program 1 times [2023-11-19 07:41:19,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:19,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494544800] [2023-11-19 07:41:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:19,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:19,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:19,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494544800] [2023-11-19 07:41:19,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494544800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:19,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:19,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059887026] [2023-11-19 07:41:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:19,412 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:19,473 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2023-11-19 07:41:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 07:41:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:19,485 INFO L225 Difference]: With dead ends: 52 [2023-11-19 07:41:19,485 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 07:41:19,488 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 [2023-11-19 07:41:19,492 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 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 [2023-11-19 07:41:19,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 07:41:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-19 07:41:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-19 07:41:19,528 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2023-11-19 07:41:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:19,528 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-19 07:41:19,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-19 07:41:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:41:19,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:19,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:19,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:19,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:19,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1034399597, now seen corresponding path program 1 times [2023-11-19 07:41:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032175805] [2023-11-19 07:41:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:19,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:19,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032175805] [2023-11-19 07:41:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032175805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:19,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:19,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:19,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861490441] [2023-11-19 07:41:19,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:19,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:19,703 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:19,772 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-11-19 07:41:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 07:41:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:19,773 INFO L225 Difference]: With dead ends: 47 [2023-11-19 07:41:19,773 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 07:41:19,774 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 [2023-11-19 07:41:19,776 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:19,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:19,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 07:41:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-19 07:41:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2023-11-19 07:41:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-11-19 07:41:19,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2023-11-19 07:41:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:19,783 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-11-19 07:41:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-11-19 07:41:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:41:19,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:19,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:41:19,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:19,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash -776234159, now seen corresponding path program 1 times [2023-11-19 07:41:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:19,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780318505] [2023-11-19 07:41:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:19,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:20,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780318505] [2023-11-19 07:41:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780318505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:20,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:20,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:41:20,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150803816] [2023-11-19 07:41:20,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:20,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:20,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:20,185 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2023-11-19 07:41:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:20,411 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2023-11-19 07:41:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:41:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 07:41:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:20,413 INFO L225 Difference]: With dead ends: 71 [2023-11-19 07:41:20,413 INFO L226 Difference]: Without dead ends: 58 [2023-11-19 07:41:20,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:41:20,416 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:20,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 102 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:41:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-19 07:41:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-11-19 07:41:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-19 07:41:20,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 17 [2023-11-19 07:41:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:20,425 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-19 07:41:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2023-11-19 07:41:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-19 07:41:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 07:41:20,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:20,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:20,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:20,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:20,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash -774387117, now seen corresponding path program 1 times [2023-11-19 07:41:20,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:20,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926707519] [2023-11-19 07:41:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926707519] [2023-11-19 07:41:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926707519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543413813] [2023-11-19 07:41:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:20,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:20,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:20,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:20,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:41:20,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:20,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543413813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:20,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:20,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-19 07:41:20,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409969016] [2023-11-19 07:41:20,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:20,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:41:20,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:41:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:20,831 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2023-11-19 07:41:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:20,863 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2023-11-19 07:41:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 17 [2023-11-19 07:41:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:20,867 INFO L225 Difference]: With dead ends: 69 [2023-11-19 07:41:20,867 INFO L226 Difference]: Without dead ends: 49 [2023-11-19 07:41:20,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:20,878 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:20,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-19 07:41:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-19 07:41:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-19 07:41:20,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2023-11-19 07:41:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:20,891 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-19 07:41:20,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2023-11-19 07:41:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-19 07:41:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:41:20,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:20,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:20,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:21,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:21,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -459646902, now seen corresponding path program 1 times [2023-11-19 07:41:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:21,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399817785] [2023-11-19 07:41:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:21,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399817785] [2023-11-19 07:41:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399817785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072544772] [2023-11-19 07:41:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:21,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:21,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:21,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:21,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:21,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:41:21,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:21,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:21,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072544772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:21,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:21,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-11-19 07:41:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798835709] [2023-11-19 07:41:21,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:21,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:41:21,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:41:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:21,742 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:21,781 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2023-11-19 07:41:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:41:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-19 07:41:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:21,785 INFO L225 Difference]: With dead ends: 72 [2023-11-19 07:41:21,785 INFO L226 Difference]: Without dead ends: 52 [2023-11-19 07:41:21,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:21,787 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:21,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-19 07:41:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-11-19 07:41:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 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) [2023-11-19 07:41:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2023-11-19 07:41:21,805 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 32 [2023-11-19 07:41:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:21,806 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2023-11-19 07:41:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2023-11-19 07:41:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 07:41:21,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:21,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:21,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:22,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:22,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:22,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash -910589295, now seen corresponding path program 2 times [2023-11-19 07:41:22,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:22,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835390296] [2023-11-19 07:41:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:22,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:22,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:22,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835390296] [2023-11-19 07:41:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835390296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:22,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714700397] [2023-11-19 07:41:22,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:22,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:22,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:22,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:22,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:23,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:23,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:23,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:41:23,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:23,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:23,216 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:41:23,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:41:23,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 22 [2023-11-19 07:41:23,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-19 07:41:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:23,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:24,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:24,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 59 [2023-11-19 07:41:24,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:24,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 30 [2023-11-19 07:41:24,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:41:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714700397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:24,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:24,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-19 07:41:24,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022037256] [2023-11-19 07:41:24,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:24,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:41:24,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:41:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=318, Unknown=9, NotChecked=0, Total=380 [2023-11-19 07:41:24,662 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:25,487 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2023-11-19 07:41:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:41:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 07:41:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:25,490 INFO L225 Difference]: With dead ends: 76 [2023-11-19 07:41:25,490 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:41:25,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=704, Unknown=11, NotChecked=0, Total=870 [2023-11-19 07:41:25,492 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:25,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 123 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:41:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:41:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2023-11-19 07:41:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2023-11-19 07:41:25,501 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 37 [2023-11-19 07:41:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:25,502 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2023-11-19 07:41:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2023-11-19 07:41:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 07:41:25,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:25,505 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:25,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:25,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:25,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash -908742253, now seen corresponding path program 1 times [2023-11-19 07:41:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:25,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584703116] [2023-11-19 07:41:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:41:26,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:26,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584703116] [2023-11-19 07:41:26,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584703116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470088568] [2023-11-19 07:41:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:26,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:26,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:26,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:26,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:27,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 07:41:27,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:27,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:27,226 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:41:27,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:41:27,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 9 [2023-11-19 07:41:27,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:41:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:27,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:27,409 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1017 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1017) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) 0)) is different from false [2023-11-19 07:41:27,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-11-19 07:41:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 1 not checked. [2023-11-19 07:41:27,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470088568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:27,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:27,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2023-11-19 07:41:27,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643723208] [2023-11-19 07:41:27,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:27,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:41:27,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:41:27,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=365, Unknown=1, NotChecked=38, Total=462 [2023-11-19 07:41:27,479 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:28,027 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2023-11-19 07:41:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:41:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 07:41:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:28,030 INFO L225 Difference]: With dead ends: 69 [2023-11-19 07:41:28,030 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 07:41:28,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=731, Unknown=1, NotChecked=56, Total=930 [2023-11-19 07:41:28,031 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:28,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 165 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 300 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2023-11-19 07:41:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 07:41:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2023-11-19 07:41:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-11-19 07:41:28,039 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 37 [2023-11-19 07:41:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:28,040 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-11-19 07:41:28,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-11-19 07:41:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 07:41:28,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:28,042 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:28,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:28,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:28,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -908740331, now seen corresponding path program 1 times [2023-11-19 07:41:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:28,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877279550] [2023-11-19 07:41:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:41:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877279550] [2023-11-19 07:41:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877279550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908663671] [2023-11-19 07:41:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:29,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:29,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:41:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:41:29,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:29,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:29,437 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:41:29,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:41:29,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 9 [2023-11-19 07:41:29,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:41:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:29,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:29,609 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1343) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 16 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) 0)) is different from false [2023-11-19 07:41:29,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-11-19 07:41:29,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:41:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 1 not checked. [2023-11-19 07:41:29,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908663671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:29,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:29,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2023-11-19 07:41:29,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209525737] [2023-11-19 07:41:29,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:29,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 07:41:29,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 07:41:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2023-11-19 07:41:29,686 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:30,139 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-11-19 07:41:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:41:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 07:41:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:30,140 INFO L225 Difference]: With dead ends: 58 [2023-11-19 07:41:30,141 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 07:41:30,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=629, Unknown=1, NotChecked=52, Total=812 [2023-11-19 07:41:30,142 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:30,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 142 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2023-11-19 07:41:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 07:41:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2023-11-19 07:41:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-11-19 07:41:30,149 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 37 [2023-11-19 07:41:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-11-19 07:41:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-11-19 07:41:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:41:30,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:30,151 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:30,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:30,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:30,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:30,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 829738032, now seen corresponding path program 1 times [2023-11-19 07:41:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85560855] [2023-11-19 07:41:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:30,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85560855] [2023-11-19 07:41:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85560855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536167286] [2023-11-19 07:41:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:30,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:30,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:30,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:41:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:31,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:41:31,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:31,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:31,217 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:41:31,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:41:31,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:41:31,313 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-19 07:41:31,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 37 [2023-11-19 07:41:31,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:31,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-19 07:41:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:31,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:31,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:31,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-11-19 07:41:31,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:31,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 31 [2023-11-19 07:41:31,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-19 07:41:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:31,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536167286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:31,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:31,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-11-19 07:41:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018751268] [2023-11-19 07:41:31,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:31,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 07:41:31,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 07:41:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:41:31,904 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:33,469 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2023-11-19 07:41:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:41:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-19 07:41:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:33,471 INFO L225 Difference]: With dead ends: 107 [2023-11-19 07:41:33,471 INFO L226 Difference]: Without dead ends: 100 [2023-11-19 07:41:33,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:41:33,474 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:33,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 342 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:41:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-19 07:41:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2023-11-19 07:41:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-19 07:41:33,484 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 38 [2023-11-19 07:41:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:33,485 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-19 07:41:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-19 07:41:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:41:33,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:33,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:33,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:33,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:33,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:33,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash 244779060, now seen corresponding path program 1 times [2023-11-19 07:41:33,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539705334] [2023-11-19 07:41:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:33,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539705334] [2023-11-19 07:41:33,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539705334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675489437] [2023-11-19 07:41:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:33,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:33,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:41:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:34,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:41:34,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:34,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:41:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675489437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:34,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:34,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-19 07:41:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898250091] [2023-11-19 07:41:34,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:34,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:34,158 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:34,209 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2023-11-19 07:41:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:41:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-19 07:41:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:34,210 INFO L225 Difference]: With dead ends: 95 [2023-11-19 07:41:34,210 INFO L226 Difference]: Without dead ends: 49 [2023-11-19 07:41:34,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:34,212 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:34,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-19 07:41:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-19 07:41:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-11-19 07:41:34,220 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 38 [2023-11-19 07:41:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:34,220 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-11-19 07:41:34,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-11-19 07:41:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:41:34,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:34,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:34,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:34,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:41:34,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:34,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash 731872996, now seen corresponding path program 1 times [2023-11-19 07:41:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:34,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83178643] [2023-11-19 07:41:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:34,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:36,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83178643] [2023-11-19 07:41:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83178643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716277899] [2023-11-19 07:41:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:36,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:36,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:36,106 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:36,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:41:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:36,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-19 07:41:36,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:36,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:36,468 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-19 07:41:36,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-19 07:41:36,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2023-11-19 07:41:36,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:41:36,713 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-19 07:41:36,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:41:36,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:41:36,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-19 07:41:36,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-19 07:41:36,875 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-19 07:41:36,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2023-11-19 07:41:36,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 20 [2023-11-19 07:41:36,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 17 [2023-11-19 07:41:37,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2023-11-19 07:41:37,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:37,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-11-19 07:41:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:41:37,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:37,462 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2304 (Array Int Int)) (v_ArrVal_2303 (Array Int Int)) (v_ArrVal_2302 (Array Int Int))) (or (= (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2303) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2302) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2304) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0))) 0) (not (= (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 12))) (store (select |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse1 (select v_ArrVal_2303 .cse1))) v_ArrVal_2303)))) is different from false [2023-11-19 07:41:37,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:37,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 67 [2023-11-19 07:41:37,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:37,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 96 [2023-11-19 07:41:37,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2023-11-19 07:41:37,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:37,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 66 [2023-11-19 07:41:37,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:37,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 82 [2023-11-19 07:41:37,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-11-19 07:41:37,590 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 12)) (.cse0 (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|))) (and (or .cse0 (forall ((v_ArrVal_2299 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2299) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |c_ULTIMATE.start_dll_create_~head~0#1.offset|) 0))) (forall ((v_arrayElimCell_41 Int) (v_ArrVal_2303 (Array Int Int)) (v_ArrVal_2299 (Array Int Int)) (v_arrayElimCell_44 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2299))) (or (= (select v_ArrVal_2303 |c_ULTIMATE.start_dll_create_~head~0#1.offset|) 0) (not (= (store (select .cse1 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse2 (select v_ArrVal_2303 .cse2)) v_ArrVal_2303)) (= (select (select (store .cse1 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2303) v_arrayElimCell_41) v_arrayElimCell_44) 0)))) (or (forall ((v_arrayElimCell_41 Int) (v_ArrVal_2303 (Array Int Int)) (v_ArrVal_2299 (Array Int Int)) (v_arrayElimCell_44 Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2299))) (or (not (= (store (select .cse3 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse2 (select v_ArrVal_2303 .cse2)) v_ArrVal_2303)) (= (select (select (store .cse3 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2303) v_arrayElimCell_41) v_arrayElimCell_44) 0)))) (not .cse0)))) is different from false [2023-11-19 07:41:37,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:41:38,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:38,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 634 treesize of output 650 [2023-11-19 07:41:38,289 INFO L349 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2023-11-19 07:41:38,290 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 304 [2023-11-19 07:41:38,366 INFO L349 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2023-11-19 07:41:38,367 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 290 [2023-11-19 07:41:38,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 262 [2023-11-19 07:41:38,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 260 [2023-11-19 07:41:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 256 [2023-11-19 07:41:38,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-19 07:41:38,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:39,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:39,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:39,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 54 [2023-11-19 07:41:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 7 refuted. 3 times theorem prover too weak. 7 trivial. 6 not checked. [2023-11-19 07:41:39,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716277899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:39,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:39,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 42 [2023-11-19 07:41:39,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722250708] [2023-11-19 07:41:39,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:39,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-19 07:41:39,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:39,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-19 07:41:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=8, NotChecked=154, Total=1722 [2023-11-19 07:41:39,454 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:41,304 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2023-11-19 07:41:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:41:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 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 43 [2023-11-19 07:41:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:41,311 INFO L225 Difference]: With dead ends: 75 [2023-11-19 07:41:41,311 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:41:41,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=366, Invalid=2390, Unknown=8, NotChecked=206, Total=2970 [2023-11-19 07:41:41,314 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 168 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:41,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 239 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 529 Invalid, 0 Unknown, 120 Unchecked, 0.9s Time] [2023-11-19 07:41:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:41:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2023-11-19 07:41:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-11-19 07:41:41,339 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2023-11-19 07:41:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:41,339 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-11-19 07:41:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-11-19 07:41:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:41:41,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:41,341 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:41,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:41,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:41:41,556 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:41,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash 733720038, now seen corresponding path program 1 times [2023-11-19 07:41:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:41,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796411547] [2023-11-19 07:41:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796411547] [2023-11-19 07:41:43,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796411547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739664968] [2023-11-19 07:41:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:43,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:43,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:43,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:43,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:41:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:43,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-19 07:41:43,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:43,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:43,580 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-19 07:41:43,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-19 07:41:43,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-11-19 07:41:43,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:41:43,839 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-19 07:41:43,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:41:43,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:41:43,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:41:43,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:41:43,998 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-19 07:41:43,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 82 [2023-11-19 07:41:44,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2023-11-19 07:41:44,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-19 07:41:44,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2023-11-19 07:41:44,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:41:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:41:44,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:44,678 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2638 (Array Int Int)) (v_ArrVal_2637 (Array Int Int)) (v_ArrVal_2636 (Array Int Int))) (or (= (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2637) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2636) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2638) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0)))) 0) (not (= (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 12))) (store (select |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse1 (select v_ArrVal_2637 .cse1))) v_ArrVal_2637)))) is different from false [2023-11-19 07:41:44,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:44,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 69 [2023-11-19 07:41:44,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:44,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 100 [2023-11-19 07:41:44,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-11-19 07:41:44,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:44,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 70 [2023-11-19 07:41:44,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:44,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 90 [2023-11-19 07:41:44,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 07:41:44,810 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 12)) (.cse3 (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (.cse0 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (and (forall ((v_ArrVal_2637 (Array Int Int))) (or (= (select v_ArrVal_2637 .cse0) 0) (forall ((v_ArrVal_2632 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2632))) (or (forall ((v_arrayElimCell_75 Int) (v_arrayElimCell_78 Int)) (= (select (select (store .cse1 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2637) v_arrayElimCell_75) (+ 8 v_arrayElimCell_78)) 0)) (not (= v_ArrVal_2637 (store (select .cse1 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse2 (select v_ArrVal_2637 .cse2))))))))) (or (not .cse3) (forall ((v_ArrVal_2637 (Array Int Int)) (v_ArrVal_2632 (Array Int Int)) (v_arrayElimCell_75 Int) (v_arrayElimCell_78 Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2632))) (or (= (select (select (store .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2637) v_arrayElimCell_75) (+ 8 v_arrayElimCell_78)) 0) (not (= v_ArrVal_2637 (store (select .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse2 (select v_ArrVal_2637 .cse2)))))))) (or .cse3 (forall ((v_ArrVal_2632 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2632) |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse0) 0))))) is different from false [2023-11-19 07:41:44,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:41:45,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2023-11-19 07:41:45,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-11-19 07:41:45,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-19 07:41:45,506 INFO L349 Elim1Store]: treesize reduction 201, result has 36.0 percent of original size [2023-11-19 07:41:45,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 387 [2023-11-19 07:41:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:45,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:45,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 337 [2023-11-19 07:41:45,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:45,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 181 [2023-11-19 07:41:45,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 162 [2023-11-19 07:41:45,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-11-19 07:41:45,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:45,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2023-11-19 07:41:45,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:45,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 64 [2023-11-19 07:41:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:41:45,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:45,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-11-19 07:41:45,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 07:41:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 9 refuted. 3 times theorem prover too weak. 7 trivial. 6 not checked. [2023-11-19 07:41:46,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739664968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:46,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:46,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 43 [2023-11-19 07:41:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277967364] [2023-11-19 07:41:46,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-19 07:41:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:46,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-19 07:41:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=8, NotChecked=158, Total=1806 [2023-11-19 07:41:46,168 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:48,494 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2023-11-19 07:41:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:41:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 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 43 [2023-11-19 07:41:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:48,496 INFO L225 Difference]: With dead ends: 75 [2023-11-19 07:41:48,496 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:41:48,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=411, Invalid=2669, Unknown=8, NotChecked=218, Total=3306 [2023-11-19 07:41:48,499 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 130 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:48,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 259 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 697 Invalid, 0 Unknown, 123 Unchecked, 1.2s Time] [2023-11-19 07:41:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:41:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2023-11-19 07:41:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-11-19 07:41:48,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2023-11-19 07:41:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:48,508 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-11-19 07:41:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-11-19 07:41:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:41:48,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:48,510 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:48,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:48,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:41:48,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:48,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash 733721960, now seen corresponding path program 1 times [2023-11-19 07:41:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:48,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495146118] [2023-11-19 07:41:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:50,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:50,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495146118] [2023-11-19 07:41:50,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495146118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:50,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672218944] [2023-11-19 07:41:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:50,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:50,293 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:50,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:41:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-19 07:41:50,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:50,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:50,715 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-19 07:41:50,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-19 07:41:50,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 22 [2023-11-19 07:41:50,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-19 07:41:50,989 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-19 07:41:50,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:41:51,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-19 07:41:51,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-19 07:41:51,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-11-19 07:41:51,136 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-19 07:41:51,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 108 [2023-11-19 07:41:51,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2023-11-19 07:41:51,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 20 [2023-11-19 07:41:51,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 29 [2023-11-19 07:41:51,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:51,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-11-19 07:41:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:41:51,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:51,773 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2968 (Array Int Int)) (v_ArrVal_2967 (Array Int Int)) (v_ArrVal_2969 (Array Int Int))) (or (not (= (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 12))) (store (select |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse0 (select v_ArrVal_2968 .cse0))) v_ArrVal_2968)) (= (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2968) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2967) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2969) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) 16))) 0))) is different from false [2023-11-19 07:41:51,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:51,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 69 [2023-11-19 07:41:51,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 96 [2023-11-19 07:41:51,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-11-19 07:41:51,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:51,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 70 [2023-11-19 07:41:51,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:51,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 90 [2023-11-19 07:41:51,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 07:41:51,877 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 16)) (.cse1 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 12)) (.cse3 (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|))) (and (forall ((v_ArrVal_2968 (Array Int Int)) (v_ArrVal_2966 (Array Int Int)) (v_arrayElimCell_112 Int) (v_arrayElimCell_115 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2966))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2968) v_arrayElimCell_112) (+ 16 v_arrayElimCell_115)) 0) (not (= (store (select .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse1 (select v_ArrVal_2968 .cse1)) v_ArrVal_2968)) (= (select v_ArrVal_2968 .cse2) 0)))) (or .cse3 (forall ((v_ArrVal_2966 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2966) |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse2)))) (or (forall ((v_ArrVal_2968 (Array Int Int)) (v_ArrVal_2966 (Array Int Int)) (v_arrayElimCell_112 Int) (v_arrayElimCell_115 Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2966))) (or (= (select (select (store .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2968) v_arrayElimCell_112) (+ 16 v_arrayElimCell_115)) 0) (not (= (store (select .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse1 (select v_ArrVal_2968 .cse1)) v_ArrVal_2968))))) (not .cse3)))) is different from false [2023-11-19 07:41:51,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 07:41:52,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:52,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1512 treesize of output 1516 [2023-11-19 07:41:52,542 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2023-11-19 07:41:52,543 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 325 treesize of output 340 [2023-11-19 07:41:52,589 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2023-11-19 07:41:52,590 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 314 [2023-11-19 07:41:52,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 282 [2023-11-19 07:41:52,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 278 [2023-11-19 07:41:52,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 270 [2023-11-19 07:41:53,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:53,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-19 07:41:53,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-19 07:41:53,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-19 07:41:53,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:53,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:53,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:53,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-11-19 07:41:53,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:53,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-11-19 07:41:53,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 07:41:53,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 07:41:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 10 refuted. 3 times theorem prover too weak. 7 trivial. 6 not checked. [2023-11-19 07:41:54,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672218944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:54,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:54,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 42 [2023-11-19 07:41:54,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374144278] [2023-11-19 07:41:54,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:54,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-19 07:41:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-19 07:41:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1408, Unknown=7, NotChecked=154, Total=1722 [2023-11-19 07:41:54,153 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:56,508 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-11-19 07:41:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:41:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 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 43 [2023-11-19 07:41:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:56,509 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:41:56,509 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:41:56,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=396, Invalid=2575, Unknown=7, NotChecked=214, Total=3192 [2023-11-19 07:41:56,511 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 173 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:56,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 240 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 596 Invalid, 0 Unknown, 123 Unchecked, 1.1s Time] [2023-11-19 07:41:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:41:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2023-11-19 07:41:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 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) [2023-11-19 07:41:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-11-19 07:41:56,520 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 43 [2023-11-19 07:41:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:56,520 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-11-19 07:41:56,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-11-19 07:41:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 07:41:56,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:56,522 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:56,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:56,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:41:56,740 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:56,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 206461501, now seen corresponding path program 1 times [2023-11-19 07:41:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:56,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057101007] [2023-11-19 07:41:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:56,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:58,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:58,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057101007] [2023-11-19 07:41:58,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057101007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:58,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337292369] [2023-11-19 07:41:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:58,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:58,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:58,068 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:58,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:41:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:58,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-19 07:41:58,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:58,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 07:41:58,514 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-19 07:41:58,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-19 07:41:58,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-19 07:41:58,625 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-19 07:41:58,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-11-19 07:41:58,725 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-11-19 07:41:58,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-19 07:41:58,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 17 [2023-11-19 07:41:58,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-19 07:41:58,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-19 07:41:58,870 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:41:58,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 49 [2023-11-19 07:41:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:41:58,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-11-19 07:41:59,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 07:41:59,258 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:41:59,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2023-11-19 07:41:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:41:59,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:59,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:59,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 89 [2023-11-19 07:41:59,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:59,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 78 [2023-11-19 07:41:59,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:59,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 119 [2023-11-19 07:41:59,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2023-11-19 07:41:59,820 INFO L349 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-11-19 07:41:59,820 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 66 [2023-11-19 07:41:59,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:41:59,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2023-11-19 07:42:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:42:00,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:00,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2023-11-19 07:42:00,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:42:00,357 INFO L349 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2023-11-19 07:42:00,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 530 treesize of output 417 [2023-11-19 07:42:00,368 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:42:00,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:00,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 139 [2023-11-19 07:42:00,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 114 [2023-11-19 07:42:00,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 107 [2023-11-19 07:42:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:42:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337292369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:00,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:00,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 46 [2023-11-19 07:42:00,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003806291] [2023-11-19 07:42:00,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:00,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-19 07:42:00,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-19 07:42:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1911, Unknown=14, NotChecked=0, Total=2070 [2023-11-19 07:42:00,714 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2023-11-19 07:42:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:03,357 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-11-19 07:42:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 07:42:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) Word has length 44 [2023-11-19 07:42:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:03,358 INFO L225 Difference]: With dead ends: 62 [2023-11-19 07:42:03,358 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 07:42:03,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=440, Invalid=3578, Unknown=14, NotChecked=0, Total=4032 [2023-11-19 07:42:03,361 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:03,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 371 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:42:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 07:42:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-19 07:42:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:42:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-11-19 07:42:03,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 44 [2023-11-19 07:42:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:03,374 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-11-19 07:42:03,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2023-11-19 07:42:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-11-19 07:42:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 07:42:03,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:03,375 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:03,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_237e533c-4023-4634-acff-0ab365f7fdb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0