./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa61daf361995635005a262e43d385a4b2c55dcce46079a14f1db13e5b0af9cd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:46:17,329 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:46:17,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:46:17,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:46:17,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:46:17,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:46:17,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:46:17,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:46:17,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:46:17,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:46:17,524 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:46:17,524 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:46:17,525 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:46:17,527 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:46:17,527 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:46:17,528 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:46:17,528 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:46:17,529 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:46:17,529 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:46:17,530 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:46:17,530 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:46:17,531 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:46:17,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:46:17,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:46:17,534 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:46:17,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:46:17,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:46:17,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:46:17,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:46:17,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:46:17,538 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:46:17,538 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:46:17,539 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:46:17,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:46:17,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:46:17,539 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:46:17,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:46:17,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:46:17,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:17,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:46:17,541 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:46:17,542 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:46:17,542 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:46:17,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:46:17,543 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:46:17,543 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:46:17,543 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:46:17,544 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_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa61daf361995635005a262e43d385a4b2c55dcce46079a14f1db13e5b0af9cd [2023-11-19 04:46:17,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:46:17,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:46:17,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:46:17,887 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:46:17,887 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:46:17,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i [2023-11-19 04:46:20,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:46:21,276 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:46:21,277 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i [2023-11-19 04:46:21,295 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/data/66a1c6fa2/a7efe2480bff4755b94f3d6c0cd23df9/FLAG76394e98d [2023-11-19 04:46:21,310 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/data/66a1c6fa2/a7efe2480bff4755b94f3d6c0cd23df9 [2023-11-19 04:46:21,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:46:21,315 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:46:21,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:21,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:46:21,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:46:21,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:21" (1/1) ... [2023-11-19 04:46:21,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f3a77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:21, skipping insertion in model container [2023-11-19 04:46:21,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:21" (1/1) ... [2023-11-19 04:46:21,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:46:21,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:46:21,873 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:46:21,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:46:22,006 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:46:22,015 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:46:22,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22 WrapperNode [2023-11-19 04:46:22,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:22,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:46:22,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:46:22,018 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:46:22,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,087 INFO L138 Inliner]: procedures = 164, calls = 70, calls flagged for inlining = 24, calls inlined = 18, statements flattened = 122 [2023-11-19 04:46:22,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:46:22,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:46:22,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:46:22,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:46:22,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,130 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:46:22,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:46:22,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:46:22,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:46:22,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (1/1) ... [2023-11-19 04:46:22,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:22,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:22,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:46:22,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:46:22,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:46:22,230 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-11-19 04:46:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-11-19 04:46:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:46:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:46:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:46:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:46:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:46:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:46:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:46:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:46:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:46:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:46:22,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:46:22,467 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:46:22,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:46:22,850 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:46:23,007 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:46:23,008 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:46:23,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:23 BoogieIcfgContainer [2023-11-19 04:46:23,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:46:23,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:46:23,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:46:23,019 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:46:23,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:46:21" (1/3) ... [2023-11-19 04:46:23,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b591ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:23, skipping insertion in model container [2023-11-19 04:46:23,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:22" (2/3) ... [2023-11-19 04:46:23,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b591ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:23, skipping insertion in model container [2023-11-19 04:46:23,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:23" (3/3) ... [2023-11-19 04:46:23,022 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_1-1.i [2023-11-19 04:46:23,042 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:46:23,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 04:46:23,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:46:23,097 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1410f274, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:46:23,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 04:46:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:46:23,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:23,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:23,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:23,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -31680471, now seen corresponding path program 1 times [2023-11-19 04:46:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:23,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341414586] [2023-11-19 04:46:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:23,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:23,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341414586] [2023-11-19 04:46:23,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341414586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:23,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:23,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:46:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165797012] [2023-11-19 04:46:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:46:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:46:23,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:46:23,567 INFO L87 Difference]: Start difference. First operand has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:23,656 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-11-19 04:46:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-19 04:46:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:23,667 INFO L225 Difference]: With dead ends: 51 [2023-11-19 04:46:23,667 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:46:23,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:46:23,674 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 64 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:46:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:46:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-11-19 04:46:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.4) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-19 04:46:23,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2023-11-19 04:46:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:23,711 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-19 04:46:23,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-19 04:46:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:46:23,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:23,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:23,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:46:23,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:23,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash -379797245, now seen corresponding path program 1 times [2023-11-19 04:46:23,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823777463] [2023-11-19 04:46:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:23,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:23,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823777463] [2023-11-19 04:46:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823777463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:23,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:23,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:46:23,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180525196] [2023-11-19 04:46:23,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:23,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:46:23,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:23,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:46:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:46:23,936 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:24,044 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-11-19 04:46:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-19 04:46:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:24,049 INFO L225 Difference]: With dead ends: 34 [2023-11-19 04:46:24,049 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:46:24,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:46:24,052 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:24,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:46:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:46:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 04:46:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-19 04:46:24,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2023-11-19 04:46:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:24,058 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-19 04:46:24,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-19 04:46:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:46:24,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:24,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:24,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:46:24,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:24,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 651255278, now seen corresponding path program 1 times [2023-11-19 04:46:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044848237] [2023-11-19 04:46:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:24,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:24,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044848237] [2023-11-19 04:46:24,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044848237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:24,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:24,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:46:24,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59587172] [2023-11-19 04:46:24,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:24,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:46:24,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:46:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:46:24,359 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:24,485 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-11-19 04:46:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:46:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 04:46:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:24,490 INFO L225 Difference]: With dead ends: 46 [2023-11-19 04:46:24,490 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 04:46:24,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:46:24,496 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:24,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 77 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:46:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 04:46:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-11-19 04:46:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-19 04:46:24,503 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 12 [2023-11-19 04:46:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:24,504 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-19 04:46:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-19 04:46:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:46:24,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:24,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:24,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:46:24,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:24,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1208538744, now seen corresponding path program 1 times [2023-11-19 04:46:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:24,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548825489] [2023-11-19 04:46:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:24,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548825489] [2023-11-19 04:46:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548825489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:24,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:24,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:46:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005951187] [2023-11-19 04:46:24,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:46:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:46:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:46:24,639 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:24,692 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-11-19 04:46:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:46:24,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 04:46:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:24,694 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:46:24,694 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:46:24,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:46:24,703 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:24,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:46:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:46:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 04:46:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-19 04:46:24,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2023-11-19 04:46:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:24,722 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-19 04:46:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-19 04:46:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:46:24,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:24,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:24,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:46:24,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:24,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash 275043863, now seen corresponding path program 1 times [2023-11-19 04:46:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:24,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687135807] [2023-11-19 04:46:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:24,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:24,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687135807] [2023-11-19 04:46:24,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687135807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:24,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:24,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:46:24,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574785254] [2023-11-19 04:46:24,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:24,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:46:24,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:46:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:46:24,873 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:24,949 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-19 04:46:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 04:46:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:24,952 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:46:24,952 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:46:24,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:46:24,954 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:24,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:46:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:46:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 04:46:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-19 04:46:24,965 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2023-11-19 04:46:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:24,965 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-19 04:46:24,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:46:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-19 04:46:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:46:24,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:24,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:24,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:46:24,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:24,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash 269764559, now seen corresponding path program 1 times [2023-11-19 04:46:24,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:24,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054879536] [2023-11-19 04:46:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:25,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:25,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054879536] [2023-11-19 04:46:25,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054879536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:25,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:25,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426104487] [2023-11-19 04:46:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:25,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:25,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:25,130 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:25,167 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-11-19 04:46:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-19 04:46:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:25,171 INFO L225 Difference]: With dead ends: 46 [2023-11-19 04:46:25,171 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:46:25,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:25,174 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:25,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:46:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:46:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 04:46:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-11-19 04:46:25,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2023-11-19 04:46:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:25,187 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-11-19 04:46:25,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-11-19 04:46:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:46:25,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:25,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:25,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:46:25,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:25,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash 67078086, now seen corresponding path program 1 times [2023-11-19 04:46:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:25,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942801638] [2023-11-19 04:46:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:25,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:25,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942801638] [2023-11-19 04:46:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942801638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108589746] [2023-11-19 04:46:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:25,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:25,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:25,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:25,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:46:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:25,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-19 04:46:25,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:25,696 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 19 treesize of output 1 [2023-11-19 04:46:25,760 WARN L876 $PredicateComparison]: unable to prove that (exists ((LDV_INIT_LIST_HEAD_~list.offset Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (let ((.cse0 (select |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base|)) (.cse1 (+ LDV_INIT_LIST_HEAD_~list.offset 4))) (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) LDV_INIT_LIST_HEAD_~list.offset (select .cse0 LDV_INIT_LIST_HEAD_~list.offset)) .cse1 (select .cse0 .cse1))))) (<= LDV_INIT_LIST_HEAD_~list.offset |c_LDV_INIT_LIST_HEAD_#in~list.offset|))) is different from true [2023-11-19 04:46:25,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:25,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-19 04:46:25,859 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 19 treesize of output 7 [2023-11-19 04:46:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:46:25,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:25,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108589746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:25,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:46:25,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 13 [2023-11-19 04:46:25,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904928855] [2023-11-19 04:46:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:25,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:46:25,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:46:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=109, Unknown=1, NotChecked=20, Total=156 [2023-11-19 04:46:25,883 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:26,104 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-19 04:46:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:46:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-19 04:46:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:26,106 INFO L225 Difference]: With dead ends: 27 [2023-11-19 04:46:26,106 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:46:26,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2023-11-19 04:46:26,107 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:26,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2023-11-19 04:46:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:46:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 04:46:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-19 04:46:26,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2023-11-19 04:46:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:26,114 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-19 04:46:26,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-19 04:46:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:46:26,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:26,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:26,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:26,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:26,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:26,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:26,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2079420746, now seen corresponding path program 1 times [2023-11-19 04:46:26,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:26,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916066440] [2023-11-19 04:46:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:26,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:26,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916066440] [2023-11-19 04:46:26,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916066440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633697974] [2023-11-19 04:46:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:26,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:26,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:46:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:26,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-19 04:46:26,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:26,784 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 19 treesize of output 1 [2023-11-19 04:46:26,843 WARN L876 $PredicateComparison]: unable to prove that (exists ((LDV_INIT_LIST_HEAD_~list.offset Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (let ((.cse0 (select |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base|)) (.cse1 (+ LDV_INIT_LIST_HEAD_~list.offset 4))) (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) LDV_INIT_LIST_HEAD_~list.offset (select .cse0 LDV_INIT_LIST_HEAD_~list.offset)) .cse1 (select .cse0 .cse1))))) (<= LDV_INIT_LIST_HEAD_~list.offset |c_LDV_INIT_LIST_HEAD_#in~list.offset|))) is different from true [2023-11-19 04:46:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:26,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-19 04:46:26,956 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 19 treesize of output 7 [2023-11-19 04:46:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:46:26,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:26,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633697974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:26,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:46:26,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 13 [2023-11-19 04:46:26,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966656246] [2023-11-19 04:46:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:26,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:46:26,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:46:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=109, Unknown=1, NotChecked=20, Total=156 [2023-11-19 04:46:26,979 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:27,180 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2023-11-19 04:46:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:46:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-19 04:46:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:27,183 INFO L225 Difference]: With dead ends: 32 [2023-11-19 04:46:27,184 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 04:46:27,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2023-11-19 04:46:27,186 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:27,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2023-11-19 04:46:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 04:46:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-11-19 04:46:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-19 04:46:27,194 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-11-19 04:46:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:27,194 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-19 04:46:27,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-19 04:46:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:46:27,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:27,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:27,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:27,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:27,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 37895520, now seen corresponding path program 1 times [2023-11-19 04:46:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820093004] [2023-11-19 04:46:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:46:27,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820093004] [2023-11-19 04:46:27,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820093004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:27,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:27,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:46:27,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285867806] [2023-11-19 04:46:27,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:46:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:27,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:46:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:46:27,582 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:46:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:27,655 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2023-11-19 04:46:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-19 04:46:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:27,657 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:46:27,657 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:46:27,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:46:27,659 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:27,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 60 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:46:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:46:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 04:46:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2023-11-19 04:46:27,664 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 20 [2023-11-19 04:46:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:27,665 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2023-11-19 04:46:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:46:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2023-11-19 04:46:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 04:46:27,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:27,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:27,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:46:27,667 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:27,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1712092491, now seen corresponding path program 1 times [2023-11-19 04:46:27,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:27,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666275510] [2023-11-19 04:46:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:27,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:27,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:27,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666275510] [2023-11-19 04:46:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666275510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:27,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107445205] [2023-11-19 04:46:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:27,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:27,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:27,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:46:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:28,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 117 conjunts are in the unsatisfiable core [2023-11-19 04:46:28,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:28,120 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 15 treesize of output 1 [2023-11-19 04:46:28,184 WARN L876 $PredicateComparison]: unable to prove that (exists ((LDV_INIT_LIST_HEAD_~list.offset Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (let ((.cse0 (select |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base|)) (.cse1 (+ LDV_INIT_LIST_HEAD_~list.offset 4))) (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) LDV_INIT_LIST_HEAD_~list.offset (select .cse0 LDV_INIT_LIST_HEAD_~list.offset)) .cse1 (select .cse0 .cse1))))) (<= LDV_INIT_LIST_HEAD_~list.offset |c_LDV_INIT_LIST_HEAD_#in~list.offset|))) is different from true [2023-11-19 04:46:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:28,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 11 [2023-11-19 04:46:28,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-19 04:46:28,479 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 15 treesize of output 7 [2023-11-19 04:46:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:28,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:46:42,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107445205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:42,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819104050] [2023-11-19 04:46:42,059 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-19 04:46:42,060 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:46:42,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:46:42,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:46:42,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:46:43,201 INFO L197 IcfgInterpreter]: Interpreting procedure LDV_INIT_LIST_HEAD with input of size 58 for LOIs [2023-11-19 04:46:43,214 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 38 for LOIs [2023-11-19 04:46:43,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:46:51,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1037#(and (= |ULTIMATE.start_ldv_kobject_create_#res#1.base| |ULTIMATE.start_entry_point_~kobj~2#1.base|) (= |ULTIMATE.start_ldv_kref_sub_~kref#1.offset| |ULTIMATE.start_ldv_atomic_sub_return_#in~v#1.offset|) (= |ULTIMATE.start_ldv_kref_sub_~kref#1.base| |ULTIMATE.start_ldv_atomic_sub_return_#in~v#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_ldv_atomic_sub_return_#in~i#1| 1) (= |ULTIMATE.start_ldv_kref_put_#in~release#1.offset| |#funAddr~ldv_kobject_release.offset|) (= |ULTIMATE.start_ldv_kref_put_~release#1.base| |ULTIMATE.start_ldv_kref_put_#in~release#1.base|) (= |ULTIMATE.start_ldv_atomic_sub_return_~i#1| 1) (= |ULTIMATE.start_ldv_kref_put_~release#1.offset| |ULTIMATE.start_ldv_kref_sub_#in~release#1.offset|) (= |ULTIMATE.start_ldv_kref_put_~kref#1.offset| |ULTIMATE.start_ldv_kref_put_#in~kref#1.offset|) (= |ULTIMATE.start_ldv_atomic_sub_return_~v#1.offset| |ULTIMATE.start_ldv_atomic_sub_return_#in~v#1.offset|) (<= (+ |ULTIMATE.start_ldv_atomic_sub_return_~temp~1#1| 2147483648) 0) (= |ULTIMATE.start_ldv_kref_put_~release#1.offset| |ULTIMATE.start_ldv_kref_put_#in~release#1.offset|) (= |~#ldv_global_msg_list~0.offset| 0) (exists ((|v_#memory_int_75| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_75| |ULTIMATE.start_ldv_kobject_get_#res#1.base| (store (select |v_#memory_int_75| |ULTIMATE.start_ldv_kobject_get_#res#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_get_#res#1.offset|) |ULTIMATE.start_ldv_atomic_add_return_#res#1|))) (= (+ (select (select |v_#memory_int_75| |ULTIMATE.start_ldv_kobject_get_#res#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_get_#res#1.offset|)) 1) |ULTIMATE.start_ldv_atomic_add_return_#res#1|))) (= (+ |ULTIMATE.start_ldv_kobject_put_~kobj#1.offset| 12) |ULTIMATE.start_ldv_kref_put_#in~kref#1.offset|) (= |ULTIMATE.start_ldv_kobject_put_~kobj#1.base| |ULTIMATE.start_ldv_kobject_put_#in~kobj#1.base|) (= |#funAddr~ldv_kobject_release.base| |ULTIMATE.start_ldv_kref_put_#in~release#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_ldv_atomic_add_return_#res#1|)) (= |ULTIMATE.start_ldv_kobject_put_~kobj#1.base| |ULTIMATE.start_ldv_kref_put_#in~kref#1.base|) (= |ULTIMATE.start_ldv_kref_sub_#in~kref#1.offset| |ULTIMATE.start_ldv_kref_sub_~kref#1.offset|) (= |ULTIMATE.start_ldv_kref_sub_#in~release#1.offset| |ULTIMATE.start_ldv_kref_sub_~release#1.offset|) (= |ULTIMATE.start_entry_point_~kobj~2#1.offset| |ULTIMATE.start_ldv_kobject_get_#res#1.offset|) (= |ULTIMATE.start_ldv_kref_sub_~count#1| 1) (exists ((|v_#memory_$Pointer$.base_55| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_ldv_kobject_get_#res#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_ldv_kobject_get_#res#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_get_#res#1.offset|) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_ldv_kobject_get_#res#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_get_#res#1.offset|)))))) (= |ULTIMATE.start_ldv_kref_sub_~release#1.base| |ULTIMATE.start_ldv_kref_sub_#in~release#1.base|) (= |ULTIMATE.start_entry_point_~kobj~2#1.base| |ULTIMATE.start_ldv_kobject_put_#in~kobj#1.base|) (= |ULTIMATE.start_ldv_kobject_get_#res#1.base| |ULTIMATE.start_entry_point_~kobj~2#1.base|) (= |ULTIMATE.start_entry_point_~kobj~2#1.offset| |ULTIMATE.start_ldv_kobject_put_#in~kobj#1.offset|) (= |ULTIMATE.start_ldv_kref_sub_#in~kref#1.base| |ULTIMATE.start_ldv_kref_put_~kref#1.base|) (= |~#ldv_global_msg_list~0.base| 1) (exists ((|v_#memory_$Pointer$.offset_55| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_ldv_kobject_get_#res#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_ldv_kobject_get_#res#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_get_#res#1.offset|) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_ldv_kobject_get_#res#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_get_#res#1.offset|)))))) (= (select (select |#memory_int| |ULTIMATE.start_ldv_atomic_sub_return_~v#1.base|) |ULTIMATE.start_ldv_atomic_sub_return_~v#1.offset|) |ULTIMATE.start_ldv_atomic_sub_return_~temp~1#1|) (or (not (= |ULTIMATE.start_ldv_kobject_put_~kobj#1.base| 0)) (not (= |ULTIMATE.start_ldv_kobject_put_~kobj#1.offset| 0))) (= |ULTIMATE.start_ldv_kref_sub_#in~kref#1.base| |ULTIMATE.start_ldv_kref_sub_~kref#1.base|) (= |ULTIMATE.start_entry_point_~kobj~2#1.offset| |ULTIMATE.start_ldv_kobject_create_#res#1.offset|) (= |ULTIMATE.start_ldv_kref_sub_#in~count#1| 1) (= |ULTIMATE.start_ldv_kref_sub_#in~kref#1.offset| |ULTIMATE.start_ldv_kref_put_~kref#1.offset|) (= |ULTIMATE.start_ldv_kobject_put_~kobj#1.offset| |ULTIMATE.start_ldv_kobject_put_#in~kobj#1.offset|) (= |ULTIMATE.start_ldv_kref_put_~release#1.base| |ULTIMATE.start_ldv_kref_sub_#in~release#1.base|) (= |ULTIMATE.start_ldv_atomic_sub_return_#in~v#1.base| |ULTIMATE.start_ldv_atomic_sub_return_~v#1.base|) (= |ULTIMATE.start_ldv_kref_put_#in~kref#1.base| |ULTIMATE.start_ldv_kref_put_~kref#1.base|))' at error location [2023-11-19 04:46:51,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:46:51,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:46:51,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 17] total 20 [2023-11-19 04:46:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194170666] [2023-11-19 04:46:51,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:46:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 04:46:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 04:46:51,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2001, Unknown=8, NotChecked=90, Total=2256 [2023-11-19 04:46:51,735 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 20 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:46:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:53,922 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-11-19 04:46:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 04:46:53,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2023-11-19 04:46:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:53,930 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:46:53,931 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:46:53,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=241, Invalid=3061, Unknown=8, NotChecked=112, Total=3422 [2023-11-19 04:46:53,934 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:53,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 40 Unchecked, 0.9s Time] [2023-11-19 04:46:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:46:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 04:46:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:46:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2023-11-19 04:46:53,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2023-11-19 04:46:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:53,940 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2023-11-19 04:46:53,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:46:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2023-11-19 04:46:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:46:53,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:53,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:53,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:46:54,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:46:54,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 635789101, now seen corresponding path program 1 times [2023-11-19 04:46:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:54,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244768864] [2023-11-19 04:46:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:54,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244768864] [2023-11-19 04:46:54,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244768864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133876860] [2023-11-19 04:46:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:54,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:54,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:54,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_390e3140-963c-4039-8078-41446b3a4301/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:46:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:54,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-19 04:46:54,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:55,375 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 15 treesize of output 1 [2023-11-19 04:46:55,597 WARN L876 $PredicateComparison]: unable to prove that (exists ((LDV_INIT_LIST_HEAD_~list.offset Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base| (let ((.cse0 (select |c_#memory_int| |c_LDV_INIT_LIST_HEAD_#in~list.base|)) (.cse1 (+ LDV_INIT_LIST_HEAD_~list.offset 4))) (store (store (select |c_old(#memory_int)| |c_LDV_INIT_LIST_HEAD_#in~list.base|) LDV_INIT_LIST_HEAD_~list.offset (select .cse0 LDV_INIT_LIST_HEAD_~list.offset)) .cse1 (select .cse0 .cse1))))) (<= LDV_INIT_LIST_HEAD_~list.offset |c_LDV_INIT_LIST_HEAD_#in~list.offset|))) is different from true [2023-11-19 04:46:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:46:55,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 11 [2023-11-19 04:46:56,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-19 04:46:56,448 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 15 treesize of output 7 [2023-11-19 04:46:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:46:56,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:47:06,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133876860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:06,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100686804] [2023-11-19 04:47:06,315 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-19 04:47:06,316 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:47:06,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:47:06,317 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:47:06,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:47:07,204 INFO L197 IcfgInterpreter]: Interpreting procedure LDV_INIT_LIST_HEAD with input of size 58 for LOIs [2023-11-19 04:47:07,216 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 38 for LOIs [2023-11-19 04:47:07,273 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:47:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [100686804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:15,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:47:15,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5, 18] total 42 [2023-11-19 04:47:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218551753] [2023-11-19 04:47:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:15,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 04:47:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 04:47:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2170, Unknown=5, NotChecked=94, Total=2450 [2023-11-19 04:47:15,374 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)