./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 503a3e49b44041609ec1bba765b53912c88abb90ff278e61e68e863904faf4bb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:20:04,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:20:04,200 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2023-11-21 22:20:04,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:20:04,212 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:20:04,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:20:04,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:20:04,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:20:04,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:20:04,250 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:20:04,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:20:04,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:20:04,252 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:20:04,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:20:04,253 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:20:04,254 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:20:04,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:20:04,255 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:20:04,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:20:04,256 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:20:04,257 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:20:04,257 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:20:04,258 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:20:04,258 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:20:04,259 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:20:04,259 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:20:04,260 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:20:04,260 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:20:04,260 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:20:04,261 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:20:04,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:20:04,263 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:20:04,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:20:04,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:04,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:20:04,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:20:04,264 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:20:04,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:20:04,265 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:20:04,265 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:20:04,265 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:20:04,266 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:20:04,266 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_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503a3e49b44041609ec1bba765b53912c88abb90ff278e61e68e863904faf4bb [2023-11-21 22:20:04,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:20:04,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:20:04,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:20:04,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:20:04,554 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:20:04,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2023-11-21 22:20:07,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:20:08,148 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:20:08,149 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2023-11-21 22:20:08,165 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/data/f57e84ae6/b520e061f8b74f469e8302ff570e4386/FLAGb968736aa [2023-11-21 22:20:08,179 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/data/f57e84ae6/b520e061f8b74f469e8302ff570e4386 [2023-11-21 22:20:08,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:20:08,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:20:08,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:08,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:20:08,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:20:08,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331ca63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08, skipping insertion in model container [2023-11-21 22:20:08,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,256 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:20:08,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:08,622 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:20:08,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:20:08,694 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:20:08,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08 WrapperNode [2023-11-21 22:20:08,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:20:08,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:08,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:20:08,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:20:08,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,717 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,777 INFO L138 Inliner]: procedures = 119, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 123 [2023-11-21 22:20:08,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:20:08,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:20:08,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:20:08,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:20:08,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,813 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:20:08,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:20:08,840 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:20:08,840 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:20:08,841 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (1/1) ... [2023-11-21 22:20:08,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:20:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:08,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:20:08,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:20:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-21 22:20:08,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-21 22:20:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:20:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:20:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:20:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:20:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:20:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:20:08,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:20:09,051 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:20:09,054 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:20:09,324 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:20:09,459 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:20:09,461 INFO L308 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-21 22:20:09,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:09 BoogieIcfgContainer [2023-11-21 22:20:09,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:20:09,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:20:09,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:20:09,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:20:09,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:20:08" (1/3) ... [2023-11-21 22:20:09,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bde753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:09, skipping insertion in model container [2023-11-21 22:20:09,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:20:08" (2/3) ... [2023-11-21 22:20:09,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bde753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:20:09, skipping insertion in model container [2023-11-21 22:20:09,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:20:09" (3/3) ... [2023-11-21 22:20:09,480 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2023-11-21 22:20:09,503 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:20:09,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:20:09,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:20:09,571 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c48e85b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:20:09,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:20:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 28 states have internal predecessors, (46), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:20:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:20:09,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:09,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:09,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:09,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash 952035366, now seen corresponding path program 1 times [2023-11-21 22:20:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:09,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304624548] [2023-11-21 22:20:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:09,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:09,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304624548] [2023-11-21 22:20:09,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304624548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:09,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:09,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:20:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517753288] [2023-11-21 22:20:09,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:20:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:20:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:20:09,922 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 28 states have internal predecessors, (46), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:09,993 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-11-21 22:20:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:20:09,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:20:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:10,004 INFO L225 Difference]: With dead ends: 28 [2023-11-21 22:20:10,006 INFO L226 Difference]: Without dead ends: 27 [2023-11-21 22:20:10,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:20:10,015 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:10,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:20:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-21 22:20:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-21 22:20:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-21 22:20:10,054 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 7 [2023-11-21 22:20:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:10,055 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-21 22:20:10,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-21 22:20:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:20:10,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:10,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:10,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:20:10,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:10,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 443535248, now seen corresponding path program 1 times [2023-11-21 22:20:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:10,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887827147] [2023-11-21 22:20:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:10,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:10,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887827147] [2023-11-21 22:20:10,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887827147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:10,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:20:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909011516] [2023-11-21 22:20:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:10,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:20:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:20:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:20:10,348 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:10,465 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-11-21 22:20:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:20:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:20:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:10,471 INFO L225 Difference]: With dead ends: 33 [2023-11-21 22:20:10,471 INFO L226 Difference]: Without dead ends: 33 [2023-11-21 22:20:10,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:20:10,473 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:20:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-21 22:20:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-21 22:20:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-21 22:20:10,481 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 8 [2023-11-21 22:20:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:10,481 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-21 22:20:10,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-21 22:20:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:20:10,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:10,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:20:10,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:10,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1494108856, now seen corresponding path program 1 times [2023-11-21 22:20:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:10,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767782296] [2023-11-21 22:20:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767782296] [2023-11-21 22:20:10,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767782296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:10,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:10,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:20:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595663026] [2023-11-21 22:20:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:10,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:20:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:20:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:20:10,899 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:11,101 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2023-11-21 22:20:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:20:11,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:20:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:11,103 INFO L225 Difference]: With dead ends: 53 [2023-11-21 22:20:11,103 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 22:20:11,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:20:11,105 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:11,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 78 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:20:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 22:20:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2023-11-21 22:20:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-21 22:20:11,112 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 11 [2023-11-21 22:20:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:11,113 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-21 22:20:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-21 22:20:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:20:11,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:11,114 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:11,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:20:11,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:11,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1303349229, now seen corresponding path program 1 times [2023-11-21 22:20:11,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:11,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436325510] [2023-11-21 22:20:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:11,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436325510] [2023-11-21 22:20:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436325510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141470672] [2023-11-21 22:20:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:12,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:12,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:12,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:12,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:20:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:12,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:20:12,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:12,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:20:12,436 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 11 treesize of output 5 [2023-11-21 22:20:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,463 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 1 [2023-11-21 22:20:12,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:12,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 184 [2023-11-21 22:20:12,868 INFO L349 Elim1Store]: treesize reduction 86, result has 26.5 percent of original size [2023-11-21 22:20:12,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 200 [2023-11-21 22:20:12,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 159 [2023-11-21 22:20:12,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 160 [2023-11-21 22:20:13,035 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 22:20:13,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 137 [2023-11-21 22:20:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:13,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2023-11-21 22:20:13,242 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 21 treesize of output 5 [2023-11-21 22:20:13,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-21 22:20:13,318 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:20:13,323 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-21 22:20:13,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2023-11-21 22:20:13,351 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-11-21 22:20:13,351 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 20 treesize of output 26 [2023-11-21 22:20:13,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-11-21 22:20:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:13,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:20:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:13,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:20:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:13,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:13,693 INFO L349 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-11-21 22:20:13,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 212 [2023-11-21 22:20:13,771 INFO L349 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-11-21 22:20:13,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 174 treesize of output 211 [2023-11-21 22:20:13,855 INFO L349 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-11-21 22:20:13,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 199 [2023-11-21 22:20:14,103 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 22:20:14,104 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 11 [2023-11-21 22:20:14,122 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 22:20:14,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 11 [2023-11-21 22:20:14,148 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 40 treesize of output 36 [2023-11-21 22:20:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:14,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141470672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:14,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:14,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-21 22:20:14,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652058351] [2023-11-21 22:20:14,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:20:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:20:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:20:14,548 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:18,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-21 22:20:21,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-21 22:20:23,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-21 22:20:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:25,164 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2023-11-21 22:20:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:20:25,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:20:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:25,167 INFO L225 Difference]: With dead ends: 83 [2023-11-21 22:20:25,167 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:20:25,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:20:25,169 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 155 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:25,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 125 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 127 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2023-11-21 22:20:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:20:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 39. [2023-11-21 22:20:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-21 22:20:25,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 13 [2023-11-21 22:20:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:25,178 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-21 22:20:25,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-21 22:20:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:20:25,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:25,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:25,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:25,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:25,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:25,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1220906540, now seen corresponding path program 1 times [2023-11-21 22:20:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675363571] [2023-11-21 22:20:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:25,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675363571] [2023-11-21 22:20:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675363571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:25,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:20:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88079287] [2023-11-21 22:20:25,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:20:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:20:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:20:25,542 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:25,771 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-11-21 22:20:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:20:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:20:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:25,779 INFO L225 Difference]: With dead ends: 41 [2023-11-21 22:20:25,779 INFO L226 Difference]: Without dead ends: 41 [2023-11-21 22:20:25,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:20:25,780 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:25,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:20:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-21 22:20:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-21 22:20:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 38 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-11-21 22:20:25,786 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 15 [2023-11-21 22:20:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:25,786 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-11-21 22:20:25,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-11-21 22:20:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:20:25,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:25,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:25,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:20:25,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:25,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1926363055, now seen corresponding path program 1 times [2023-11-21 22:20:25,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:25,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065322633] [2023-11-21 22:20:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065322633] [2023-11-21 22:20:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065322633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827508514] [2023-11-21 22:20:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:27,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:27,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:27,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:20:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:27,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:20:27,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:27,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:20:29,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:20:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:30,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:20:30,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:30,132 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 119 treesize of output 119 [2023-11-21 22:20:30,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:20:30,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 107 [2023-11-21 22:20:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:20:31,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827508514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:20:31,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:20:31,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 21 [2023-11-21 22:20:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825774595] [2023-11-21 22:20:31,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:20:31,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 22:20:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 22:20:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:20:31,610 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2023-11-21 22:20:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:20:34,623 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2023-11-21 22:20:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:20:34,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 16 [2023-11-21 22:20:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:20:34,625 INFO L225 Difference]: With dead ends: 65 [2023-11-21 22:20:34,625 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 22:20:34,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-11-21 22:20:34,627 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:20:34,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 173 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-21 22:20:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 22:20:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2023-11-21 22:20:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-11-21 22:20:34,634 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 16 [2023-11-21 22:20:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:20:34,634 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-11-21 22:20:34,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2023-11-21 22:20:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-11-21 22:20:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 22:20:34,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:20:34,636 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:34,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:34,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:34,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:20:34,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:34,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1180965225, now seen corresponding path program 2 times [2023-11-21 22:20:34,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:34,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198813326] [2023-11-21 22:20:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:34,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:20:37,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198813326] [2023-11-21 22:20:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198813326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:20:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816730658] [2023-11-21 22:20:37,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:20:37,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:20:37,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:20:37,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:20:37,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf5adff-5a60-41bf-a5a9-21ddfcf2ace9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:20:37,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:20:37,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:20:37,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-21 22:20:37,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:20:37,480 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 [2023-11-21 22:20:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:37,510 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 22:20:37,518 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:20:38,002 INFO L349 Elim1Store]: treesize reduction 90, result has 23.1 percent of original size [2023-11-21 22:20:38,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 174 treesize of output 208 [2023-11-21 22:20:38,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 190 [2023-11-21 22:20:38,143 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 22:20:38,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 167 [2023-11-21 22:20:38,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 156 [2023-11-21 22:20:38,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 144 [2023-11-21 22:20:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:38,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2023-11-21 22:20:38,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:38,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2023-11-21 22:20:39,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:39,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2023-11-21 22:20:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:39,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 127 [2023-11-21 22:20:39,588 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:20:39,590 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-21 22:20:39,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 22:20:39,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:39,981 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-21 22:20:39,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-11-21 22:20:40,653 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 22:20:40,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 162 treesize of output 186 [2023-11-21 22:20:40,822 INFO L349 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2023-11-21 22:20:40,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 272 treesize of output 294 [2023-11-21 22:20:40,997 INFO L349 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2023-11-21 22:20:40,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 274 [2023-11-21 22:20:41,514 INFO L349 Elim1Store]: treesize reduction 224, result has 20.3 percent of original size [2023-11-21 22:20:41,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 231 treesize of output 287 [2023-11-21 22:20:41,738 INFO L349 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2023-11-21 22:20:41,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 214 treesize of output 242 [2023-11-21 22:20:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:42,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 105 [2023-11-21 22:20:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:42,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2023-11-21 22:20:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:42,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2023-11-21 22:20:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:20:42,728 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 22:20:42,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 134 [2023-11-21 22:20:43,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 18 [2023-11-21 22:20:43,529 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-21 22:20:43,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 36 [2023-11-21 22:20:43,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-21 22:20:44,697 INFO L349 Elim1Store]: treesize reduction 78, result has 28.4 percent of original size [2023-11-21 22:20:44,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 314 treesize of output 351 [2023-11-21 22:20:44,929 INFO L349 Elim1Store]: treesize reduction 78, result has 28.4 percent of original size [2023-11-21 22:20:44,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 326 [2023-11-21 22:20:45,672 INFO L349 Elim1Store]: treesize reduction 378, result has 20.8 percent of original size [2023-11-21 22:20:45,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 34 case distinctions, treesize of input 275 treesize of output 371 [2023-11-21 22:20:45,981 INFO L349 Elim1Store]: treesize reduction 133, result has 24.9 percent of original size [2023-11-21 22:20:45,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 252 treesize of output 296 [2023-11-21 22:20:46,089 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 22:20:46,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 148 [2023-11-21 22:20:46,154 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 8 treesize of output 7 [2023-11-21 22:20:46,255 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 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-21 22:20:48,571 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 36 treesize of output 32 [2023-11-21 22:20:48,618 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 22:20:48,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-21 22:20:48,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-21 22:20:48,706 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 36 treesize of output 32 [2023-11-21 22:20:48,790 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2023-11-21 22:20:48,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 68 treesize of output 82