./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/dll-queue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 338b6951ab628b0237aa41c64d1786e44f90130a76a8fd0978f750b3fe39d026 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:49:45,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:49:45,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2023-11-24 23:49:45,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:49:45,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:49:45,227 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:49:45,228 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:49:45,229 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:49:45,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:49:45,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:49:45,235 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:49:45,237 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:49:45,237 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:49:45,239 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:49:45,239 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:49:45,240 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:49:45,240 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:49:45,241 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:49:45,241 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:49:45,242 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:49:45,242 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:49:45,243 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:49:45,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 23:49:45,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 23:49:45,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:49:45,246 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:49:45,246 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:49:45,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:49:45,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:49:45,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:49:45,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:49:45,249 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 23:49:45,250 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 23:49:45,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:49:45,250 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:49:45,250 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:49:45,251 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:49:45,251 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:49:45,251 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:49:45,252 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:49:45,252 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:49:45,253 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:49:45,253 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:49:45,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:45,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:49:45,254 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:49:45,255 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:49:45,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:49:45,255 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:49:45,255 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:49:45,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:49:45,256 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 338b6951ab628b0237aa41c64d1786e44f90130a76a8fd0978f750b3fe39d026 [2023-11-24 23:49:45,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:49:45,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:49:45,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:49:45,650 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:49:45,651 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:49:45,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/forester-heap/dll-queue-2.i [2023-11-24 23:49:49,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:49:49,387 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:49:49,388 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/sv-benchmarks/c/forester-heap/dll-queue-2.i [2023-11-24 23:49:49,416 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/data/406bd6896/c8ad66bc62a348dd80ece71abc028ce3/FLAGf8de0c6c6 [2023-11-24 23:49:49,438 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/data/406bd6896/c8ad66bc62a348dd80ece71abc028ce3 [2023-11-24 23:49:49,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:49:49,447 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:49:49,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:49,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:49:49,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:49:49,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a23c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49, skipping insertion in model container [2023-11-24 23:49:49,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:49:50,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:50,032 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:49:50,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:50,141 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:49:50,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50 WrapperNode [2023-11-24 23:49:50,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:50,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:50,144 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:49:50,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:49:50,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,181 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,242 INFO L138 Inliner]: procedures = 119, calls = 52, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 224 [2023-11-24 23:49:50,245 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:50,246 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:49:50,246 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:49:50,246 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:49:50,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,358 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:49:50,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:49:50,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:49:50,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:49:50,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (1/1) ... [2023-11-24 23:49:50,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:50,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:49:50,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:49:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-24 23:49:50,491 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-24 23:49:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:49:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:49:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:49:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:49:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:49:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:49:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:49:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:49:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:49:50,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:49:50,658 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:49:50,661 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:49:51,076 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:49:51,180 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:49:51,180 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-24 23:49:51,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:51 BoogieIcfgContainer [2023-11-24 23:49:51,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:49:51,184 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:49:51,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:49:51,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:49:51,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:49:49" (1/3) ... [2023-11-24 23:49:51,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479351e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:51, skipping insertion in model container [2023-11-24 23:49:51,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:50" (2/3) ... [2023-11-24 23:49:51,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479351e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:51, skipping insertion in model container [2023-11-24 23:49:51,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:51" (3/3) ... [2023-11-24 23:49:51,196 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-queue-2.i [2023-11-24 23:49:51,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:49:51,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:49:51,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:49:51,269 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=FINITE_AUTOMATA, 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;@3e080ce3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:49:51,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:49:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 65 states have (on average 1.8153846153846154) internal successors, (118), 67 states have internal predecessors, (118), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 23:49:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:49:51,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:51,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:49:51,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:49:51,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1019578909, now seen corresponding path program 1 times [2023-11-24 23:49:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103396201] [2023-11-24 23:49:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:51,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:51,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103396201] [2023-11-24 23:49:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103396201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:51,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:49:51,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291962198] [2023-11-24 23:49:51,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:51,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:49:51,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:51,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:49:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:49:51,527 INFO L87 Difference]: Start difference. First operand has 83 states, 65 states have (on average 1.8153846153846154) internal successors, (118), 67 states have internal predecessors, (118), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 23:49:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:51,598 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2023-11-24 23:49:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:49:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2023-11-24 23:49:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:51,609 INFO L225 Difference]: With dead ends: 67 [2023-11-24 23:49:51,610 INFO L226 Difference]: Without dead ends: 66 [2023-11-24 23:49:51,612 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 [2023-11-24 23:49:51,616 INFO L413 NwaCegarLoop]: 79 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, 79 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:51,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:49:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-24 23:49:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-24 23:49:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.4) internal successors, (70), 64 states have internal predecessors, (70), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2023-11-24 23:49:51,668 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 6 [2023-11-24 23:49:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:51,669 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2023-11-24 23:49:51,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 23:49:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2023-11-24 23:49:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:49:51,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:51,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:51,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:49:51,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:49:51,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1057605461, now seen corresponding path program 1 times [2023-11-24 23:49:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:51,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85790189] [2023-11-24 23:49:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:51,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:51,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85790189] [2023-11-24 23:49:51,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85790189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:51,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:51,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:49:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636831622] [2023-11-24 23:49:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:51,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:49:51,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:49:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:49:51,835 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 3 states, 3 states have (on average 2.0) 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) [2023-11-24 23:49:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:51,940 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-11-24 23:49:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:49:51,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 [2023-11-24 23:49:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:51,942 INFO L225 Difference]: With dead ends: 62 [2023-11-24 23:49:51,943 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 23:49:51,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:49:51,945 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:51,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 67 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 23:49:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-24 23:49:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 60 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2023-11-24 23:49:51,962 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 7 [2023-11-24 23:49:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:51,963 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2023-11-24 23:49:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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) [2023-11-24 23:49:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2023-11-24 23:49:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:49:51,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:51,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:49:51,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:49:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1559891615, now seen corresponding path program 1 times [2023-11-24 23:49:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732405264] [2023-11-24 23:49:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:52,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732405264] [2023-11-24 23:49:52,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732405264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:52,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:52,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:49:52,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504640682] [2023-11-24 23:49:52,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:49:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:49:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:49:52,470 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-24 23:49:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:52,675 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-11-24 23:49:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:49:52,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2023-11-24 23:49:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:52,679 INFO L225 Difference]: With dead ends: 103 [2023-11-24 23:49:52,682 INFO L226 Difference]: Without dead ends: 103 [2023-11-24 23:49:52,682 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 [2023-11-24 23:49:52,684 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:52,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:49:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-24 23:49:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2023-11-24 23:49:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 59 states have internal predecessors, (65), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2023-11-24 23:49:52,707 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2023-11-24 23:49:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:52,708 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2023-11-24 23:49:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-24 23:49:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2023-11-24 23:49:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:49:52,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:52,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:52,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:49:52,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:49:52,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1528095303, now seen corresponding path program 1 times [2023-11-24 23:49:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:52,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341244732] [2023-11-24 23:49:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:52,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:52,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341244732] [2023-11-24 23:49:52,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341244732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:52,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:52,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:49:52,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834335418] [2023-11-24 23:49:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:52,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:49:52,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:49:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:49:52,799 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-11-24 23:49:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:52,885 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-11-24 23:49:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:49:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 [2023-11-24 23:49:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:52,887 INFO L225 Difference]: With dead ends: 80 [2023-11-24 23:49:52,887 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 23:49:52,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:49:52,889 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:52,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 125 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 23:49:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2023-11-24 23:49:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2023-11-24 23:49:52,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 13 [2023-11-24 23:49:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:52,898 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2023-11-24 23:49:52,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-11-24 23:49:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2023-11-24 23:49:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 23:49:52,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:52,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:52,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:49:52,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:49:52,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:52,900 INFO L85 PathProgramCache]: Analyzing trace with hash 708264765, now seen corresponding path program 1 times [2023-11-24 23:49:52,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128331230] [2023-11-24 23:49:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:52,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:53,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:53,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128331230] [2023-11-24 23:49:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128331230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944054946] [2023-11-24 23:49:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:53,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:53,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:53,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:49:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:53,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:49:53,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:53,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 23:49:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:53,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944054946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:49:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981958676] [2023-11-24 23:49:53,393 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-24 23:49:53,394 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:53,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:49:53,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:49:53,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:49:54,476 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:49:56,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [981958676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:56,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:49:56,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [2, 2, 2] total 9 [2023-11-24 23:49:56,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891959046] [2023-11-24 23:49:56,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:56,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:49:56,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:56,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:49:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:49:56,374 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-24 23:49:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:57,072 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-11-24 23:49:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:49:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2023-11-24 23:49:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:57,079 INFO L225 Difference]: With dead ends: 74 [2023-11-24 23:49:57,079 INFO L226 Difference]: Without dead ends: 63 [2023-11-24 23:49:57,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:49:57,080 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:57,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:49:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-24 23:49:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-24 23:49:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 61 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-11-24 23:49:57,093 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 14 [2023-11-24 23:49:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:57,094 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-11-24 23:49:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-24 23:49:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-11-24 23:49:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:49:57,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:57,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:57,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:57,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:57,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:49:57,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1287676056, now seen corresponding path program 1 times [2023-11-24 23:49:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:57,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209512175] [2023-11-24 23:49:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:57,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209512175] [2023-11-24 23:49:57,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209512175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081233800] [2023-11-24 23:49:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:57,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:57,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:57,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:49:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:57,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 23:49:57,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:57,905 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 [2023-11-24 23:49:57,996 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:49:57,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:49:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:58,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2023-11-24 23:49:58,037 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 23:49:58,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 68 [2023-11-24 23:49:58,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 23:49:58,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:58,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:58,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2023-11-24 23:49:58,198 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 24 treesize of output 12 [2023-11-24 23:49:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:58,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:58,447 INFO L349 Elim1Store]: treesize reduction 434, result has 7.5 percent of original size [2023-11-24 23:49:58,448 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 6 case distinctions, treesize of input 554 treesize of output 516 [2023-11-24 23:49:58,537 INFO L349 Elim1Store]: treesize reduction 20, result has 73.0 percent of original size [2023-11-24 23:49:58,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 432 treesize of output 419 [2023-11-24 23:49:58,773 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 9 treesize of output 1 [2023-11-24 23:49:59,355 INFO L349 Elim1Store]: treesize reduction 50, result has 42.5 percent of original size [2023-11-24 23:49:59,356 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 6 case distinctions, treesize of input 74 treesize of output 107 [2023-11-24 23:49:59,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:59,446 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 238 treesize of output 234 [2023-11-24 23:49:59,594 INFO L349 Elim1Store]: treesize reduction 64, result has 31.9 percent of original size [2023-11-24 23:49:59,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 791 treesize of output 762 [2023-11-24 23:49:59,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:59,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 390 treesize of output 396 [2023-11-24 23:49:59,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:59,726 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 1 case distinctions, treesize of input 15 treesize of output 11 [2023-11-24 23:49:59,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:50:00,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 152 [2023-11-24 23:50:00,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 133 [2023-11-24 23:50:00,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 23:50:00,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:50:00,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-11-24 23:50:00,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:50:00,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 60 [2023-11-24 23:50:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:00,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081233800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450354270] [2023-11-24 23:50:00,877 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-24 23:50:00,877 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:50:00,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:50:00,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:50:00,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:50:01,870 INFO L197 IcfgInterpreter]: Interpreting procedure reach_error with input of size 18 for LOIs [2023-11-24 23:50:01,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:50:20,178 WARN L293 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 241 DAG size of output: 235 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-24 23:50:22,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1012#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_1| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_1|) 0) 0) (not (= |v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_1| 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_1|) 0) 0))))' at error location [2023-11-24 23:50:22,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:50:22,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:50:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-11-24 23:50:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345727878] [2023-11-24 23:50:22,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:50:22,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:50:22,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:22,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:50:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=281, Unknown=2, NotChecked=0, Total=342 [2023-11-24 23:50:22,187 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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) [2023-11-24 23:50:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:22,703 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2023-11-24 23:50:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:50:22,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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 19 [2023-11-24 23:50:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:22,705 INFO L225 Difference]: With dead ends: 116 [2023-11-24 23:50:22,706 INFO L226 Difference]: Without dead ends: 116 [2023-11-24 23:50:22,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=71, Invalid=347, Unknown=2, NotChecked=0, Total=420 [2023-11-24 23:50:22,707 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 90 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:22,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 321 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:50:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-24 23:50:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2023-11-24 23:50:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 74 states have internal predecessors, (82), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2023-11-24 23:50:22,717 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 19 [2023-11-24 23:50:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:22,718 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2023-11-24 23:50:22,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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) [2023-11-24 23:50:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2023-11-24 23:50:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 23:50:22,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:22,720 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:22,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:50:22,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:22,927 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:50:22,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:22,928 INFO L85 PathProgramCache]: Analyzing trace with hash -893862210, now seen corresponding path program 1 times [2023-11-24 23:50:22,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:22,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851614678] [2023-11-24 23:50:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:22,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:23,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:23,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851614678] [2023-11-24 23:50:23,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851614678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:23,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463442858] [2023-11-24 23:50:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:23,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:23,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:23,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:50:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:23,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:50:23,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:23,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:23,360 INFO L349 Elim1Store]: treesize reduction 68, result has 48.9 percent of original size [2023-11-24 23:50:23,361 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 6 case distinctions, treesize of input 127 treesize of output 184 [2023-11-24 23:50:23,489 INFO L349 Elim1Store]: treesize reduction 68, result has 48.9 percent of original size [2023-11-24 23:50:23,489 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 6 case distinctions, treesize of input 100 treesize of output 157 [2023-11-24 23:50:23,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:50:23,664 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 254 treesize of output 242 [2023-11-24 23:50:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463442858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018534210] [2023-11-24 23:50:23,726 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-24 23:50:23,726 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:50:23,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:50:23,727 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:50:23,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:50:24,672 INFO L197 IcfgInterpreter]: Interpreting procedure reach_error with input of size 18 for LOIs [2023-11-24 23:50:24,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:50:40,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1336#(and (exists ((|v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_2| Int)) (and (= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_2|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_2|) 0) 0) (not (= |v_ULTIMATE.start_main_~head~0#1.base_BEFORE_CALL_2| 0)))) (<= 1 |#StackHeapBarrier|))' at error location [2023-11-24 23:50:40,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:50:40,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:50:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-24 23:50:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654353004] [2023-11-24 23:50:40,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:50:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:50:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:50:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=156, Unknown=2, NotChecked=0, Total=210 [2023-11-24 23:50:40,695 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-24 23:50:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:40,805 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2023-11-24 23:50:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:50:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 20 [2023-11-24 23:50:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:40,808 INFO L225 Difference]: With dead ends: 90 [2023-11-24 23:50:40,809 INFO L226 Difference]: Without dead ends: 90 [2023-11-24 23:50:40,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=52, Invalid=156, Unknown=2, NotChecked=0, Total=210 [2023-11-24 23:50:40,810 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 21 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:40,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 181 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:50:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-24 23:50:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2023-11-24 23:50:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 76 states have internal predecessors, (83), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-11-24 23:50:40,817 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 20 [2023-11-24 23:50:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:40,817 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-11-24 23:50:40,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-24 23:50:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-11-24 23:50:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:50:40,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:40,819 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:40,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 23:50:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:41,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-24 23:50:41,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1890172983, now seen corresponding path program 2 times [2023-11-24 23:50:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:41,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718032112] [2023-11-24 23:50:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:41,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:41,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718032112] [2023-11-24 23:50:41,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718032112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063996888] [2023-11-24 23:50:41,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:50:41,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:41,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:41,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3ba3134-ba9e-43cd-b0ef-02645ad58135/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:50:41,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:50:41,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:50:41,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:50:41,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:41,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:50:41,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:50:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:41,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:41,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063996888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057211815] [2023-11-24 23:50:41,627 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-24 23:50:41,628 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:50:41,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:50:41,628 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:50:41,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:50:42,257 INFO L197 IcfgInterpreter]: Interpreting procedure reach_error with input of size 18 for LOIs [2023-11-24 23:50:42,262 INFO L180 IcfgInterpreter]: Interpretation finished