./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh --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 11cd0b9da22b48a523bf90b6f5cbc98a0e4e6a8f70a83fae3d817f12f25f212c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:29:19,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:29:19,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 14:29:19,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:29:19,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:29:19,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:29:19,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:29:19,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:29:19,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:29:19,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:29:19,396 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:29:19,396 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:29:19,397 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:29:19,397 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:29:19,398 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:29:19,398 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:29:19,398 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:29:19,399 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:29:19,399 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:29:19,400 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:29:19,400 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:29:19,401 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:29:19,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:29:19,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:29:19,402 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:29:19,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:29:19,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:29:19,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:29:19,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:29:19,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:29:19,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:29:19,405 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 14:29:19,405 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:29:19,405 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:29:19,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:29:19,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:29:19,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:29:19,406 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:29:19,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:29:19,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:29:19,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:29:19,407 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:29:19,407 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:29:19,407 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:29:19,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:29:19,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:29:19,408 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:29:19,408 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:29:19,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:29:19,408 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_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11cd0b9da22b48a523bf90b6f5cbc98a0e4e6a8f70a83fae3d817f12f25f212c [2023-12-02 14:29:19,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:29:19,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:29:19,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:29:19,680 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:29:19,681 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:29:19,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2023-12-02 14:29:22,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:29:22,580 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:29:22,581 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2023-12-02 14:29:22,596 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/data/3cde5f1b5/0014733cce364c209bd9b5b6d8e18af3/FLAG8f9b57430 [2023-12-02 14:29:22,609 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/data/3cde5f1b5/0014733cce364c209bd9b5b6d8e18af3 [2023-12-02 14:29:22,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:29:22,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:29:22,614 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:29:22,614 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:29:22,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:29:22,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:29:22" (1/1) ... [2023-12-02 14:29:22,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c50b0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:22, skipping insertion in model container [2023-12-02 14:29:22,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:29:22" (1/1) ... [2023-12-02 14:29:22,670 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:29:22,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:29:23,002 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:29:23,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:29:23,076 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:29:23,081 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:29:23,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23 WrapperNode [2023-12-02 14:29:23,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:29:23,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:29:23,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:29:23,083 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:29:23,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,106 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,129 INFO L138 Inliner]: procedures = 164, calls = 69, calls flagged for inlining = 23, calls inlined = 15, statements flattened = 99 [2023-12-02 14:29:23,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:29:23,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:29:23,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:29:23,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:29:23,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,143 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,162 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:29:23,163 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:29:23,163 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:29:23,163 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:29:23,164 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (1/1) ... [2023-12-02 14:29:23,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:29:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:23,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:29:23,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:29:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:29:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-12-02 14:29:23,230 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-12-02 14:29:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 14:29:23,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 14:29:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:29:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:29:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:29:23,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 14:29:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 14:29:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:29:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 14:29:23,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:29:23,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:29:23,379 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:29:23,382 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:29:23,565 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:29:23,657 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:29:23,657 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 14:29:23,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:29:23 BoogieIcfgContainer [2023-12-02 14:29:23,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:29:23,662 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:29:23,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:29:23,665 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:29:23,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:29:22" (1/3) ... [2023-12-02 14:29:23,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3457b29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:29:23, skipping insertion in model container [2023-12-02 14:29:23,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:23" (2/3) ... [2023-12-02 14:29:23,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3457b29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:29:23, skipping insertion in model container [2023-12-02 14:29:23,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:29:23" (3/3) ... [2023-12-02 14:29:23,668 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_1-2.i [2023-12-02 14:29:23,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:29:23,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:29:23,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:29:23,731 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;@585bfb0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:29:23,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:29:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 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) [2023-12-02 14:29:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 14:29:23,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:23,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:23,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-12-02 14:29:23,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1817824165, now seen corresponding path program 1 times [2023-12-02 14:29:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203160627] [2023-12-02 14:29:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:24,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:24,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203160627] [2023-12-02 14:29:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203160627] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:29:24,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:29:24,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:29:24,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646642468] [2023-12-02 14:29:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:29:24,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:29:24,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:29:24,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:29:24,135 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 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) 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) [2023-12-02 14:29:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:24,202 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-12-02 14:29:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:29:24,204 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 [2023-12-02 14:29:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:24,210 INFO L225 Difference]: With dead ends: 33 [2023-12-02 14:29:24,211 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 14:29:24,213 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 [2023-12-02 14:29:24,216 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:24,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:29:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 14:29:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-02 14:29:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 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) [2023-12-02 14:29:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-12-02 14:29:24,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2023-12-02 14:29:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:24,243 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-12-02 14:29:24,243 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) [2023-12-02 14:29:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-12-02 14:29:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 14:29:24,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:24,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:24,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:29:24,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-12-02 14:29:24,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1550044503, now seen corresponding path program 1 times [2023-12-02 14:29:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:24,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546431731] [2023-12-02 14:29:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:24,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:24,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546431731] [2023-12-02 14:29:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546431731] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:29:24,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:29:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:29:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772923812] [2023-12-02 14:29:24,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:29:24,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:29:24,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:29:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:29:24,457 INFO L87 Difference]: Start difference. First operand 20 states and 22 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) [2023-12-02 14:29:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:24,543 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-02 14:29:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:29:24,544 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 [2023-12-02 14:29:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:24,545 INFO L225 Difference]: With dead ends: 27 [2023-12-02 14:29:24,545 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 14:29:24,546 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 [2023-12-02 14:29:24,547 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:24,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:29:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 14:29:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-02 14:29:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 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) [2023-12-02 14:29:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-02 14:29:24,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2023-12-02 14:29:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:24,553 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-02 14:29:24,554 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) [2023-12-02 14:29:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-02 14:29:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 14:29:24,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:24,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:24,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:29:24,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-12-02 14:29:24,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2050136046, now seen corresponding path program 1 times [2023-12-02 14:29:24,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:24,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143197679] [2023-12-02 14:29:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:24,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:24,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:24,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143197679] [2023-12-02 14:29:24,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143197679] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:29:24,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:29:24,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:29:24,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866143684] [2023-12-02 14:29:24,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:29:24,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:29:24,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:29:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:29:24,688 INFO L87 Difference]: Start difference. First operand 20 states and 21 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) [2023-12-02 14:29:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:24,748 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2023-12-02 14:29:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:29:24,749 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 [2023-12-02 14:29:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:24,750 INFO L225 Difference]: With dead ends: 28 [2023-12-02 14:29:24,750 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 14:29:24,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:29:24,752 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:24,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:29:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 14:29:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-02 14:29:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2023-12-02 14:29:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2023-12-02 14:29:24,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2023-12-02 14:29:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:24,758 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2023-12-02 14:29:24,759 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) [2023-12-02 14:29:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2023-12-02 14:29:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 14:29:24,759 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:24,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:29:24,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-12-02 14:29:24,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash -570362769, now seen corresponding path program 1 times [2023-12-02 14:29:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:24,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866469986] [2023-12-02 14:29:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:24,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:24,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866469986] [2023-12-02 14:29:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866469986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:29:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:29:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:29:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130176004] [2023-12-02 14:29:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:29:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:29:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:29:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:29:24,907 INFO L87 Difference]: Start difference. First operand 20 states and 20 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) [2023-12-02 14:29:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:24,929 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2023-12-02 14:29:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:29:24,930 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 [2023-12-02 14:29:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:24,931 INFO L225 Difference]: With dead ends: 34 [2023-12-02 14:29:24,931 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 14:29:24,931 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 [2023-12-02 14:29:24,933 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:24,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:29:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 14:29:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 14:29:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2023-12-02 14:29:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-12-02 14:29:24,952 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2023-12-02 14:29:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:24,953 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-12-02 14:29:24,953 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) [2023-12-02 14:29:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-12-02 14:29:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 14:29:24,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:24,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:24,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:29:24,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-12-02 14:29:24,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1192545042, now seen corresponding path program 1 times [2023-12-02 14:29:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311350878] [2023-12-02 14:29:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:25,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:25,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311350878] [2023-12-02 14:29:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311350878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:25,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745730404] [2023-12-02 14:29:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:25,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:25,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:29:25,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:29:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:25,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-02 14:29:25,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:29:25,358 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 [2023-12-02 14:29:25,424 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 [2023-12-02 14:29:25,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:29:25,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:29:25,444 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 [2023-12-02 14:29:25,519 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 [2023-12-02 14:29:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:25,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:29:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745730404] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012506181] [2023-12-02 14:29:27,816 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:29:27,817 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:29:27,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:29:27,825 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:29:27,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:29:28,903 INFO L197 IcfgInterpreter]: Interpreting procedure LDV_INIT_LIST_HEAD with input of size 58 for LOIs [2023-12-02 14:29:28,914 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 38 for LOIs [2023-12-02 14:29:28,945 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:29:31,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(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) (= (+ |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|) (= |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_ldv_kref_sub_~count#1| 1) (= |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_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) (= (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 [2023-12-02 14:29:31,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:29:31,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:29:31,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11] total 14 [2023-12-02 14:29:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723547037] [2023-12-02 14:29:31,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:29:31,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:29:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:29:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1013, Unknown=3, NotChecked=64, Total=1190 [2023-12-02 14:29:31,422 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:29:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:31,639 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2023-12-02 14:29:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:29:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-12-02 14:29:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:31,640 INFO L225 Difference]: With dead ends: 34 [2023-12-02 14:29:31,641 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 14:29:31,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=147, Invalid=1336, Unknown=3, NotChecked=74, Total=1560 [2023-12-02 14:29:31,642 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:31,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2023-12-02 14:29:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 14:29:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 14:29:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2023-12-02 14:29:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-12-02 14:29:31,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2023-12-02 14:29:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:31,646 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-12-02 14:29:31,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:29:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-12-02 14:29:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:29:31,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:29:31,647 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:29:31,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:29:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:31,848 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-12-02 14:29:31,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:29:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 769099233, now seen corresponding path program 1 times [2023-12-02 14:29:31,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:29:31,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428022821] [2023-12-02 14:29:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:31,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:29:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:32,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:29:32,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428022821] [2023-12-02 14:29:32,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428022821] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:32,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303689492] [2023-12-02 14:29:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:29:32,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:32,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:32,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:29:32,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:29:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:29:32,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 94 conjunts are in the unsatisfiable core [2023-12-02 14:29:32,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:29:32,194 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 [2023-12-02 14:29:32,231 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 [2023-12-02 14:29:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:29:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:29:32,244 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 [2023-12-02 14:29:32,310 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 [2023-12-02 14:29:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:29:32,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:29:32,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303689492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:29:32,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329555833] [2023-12-02 14:29:32,526 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:29:32,526 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:29:32,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:29:32,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:29:32,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:29:32,996 INFO L197 IcfgInterpreter]: Interpreting procedure LDV_INIT_LIST_HEAD with input of size 58 for LOIs [2023-12-02 14:29:33,005 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 38 for LOIs [2023-12-02 14:29:33,030 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:29:35,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#(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|) (<= 2147483649 |ULTIMATE.start_ldv_atomic_sub_return_~temp~1#1|) (= |ULTIMATE.start_ldv_kref_put_~release#1.offset| |ULTIMATE.start_ldv_kref_put_#in~release#1.offset|) (= |~#ldv_global_msg_list~0.offset| 0) (= (+ |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|) (= |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_ldv_kref_sub_~count#1| 1) (= |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_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) (= (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 [2023-12-02 14:29:35,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:29:35,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:29:35,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12] total 15 [2023-12-02 14:29:35,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997565554] [2023-12-02 14:29:35,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:29:35,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 14:29:35,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:29:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 14:29:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1141, Unknown=2, NotChecked=68, Total=1332 [2023-12-02 14:29:35,320 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:29:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:29:35,551 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-02 14:29:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:29:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-12-02 14:29:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:29:35,552 INFO L225 Difference]: With dead ends: 33 [2023-12-02 14:29:35,552 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 14:29:35,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=158, Invalid=1484, Unknown=2, NotChecked=78, Total=1722 [2023-12-02 14:29:35,554 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:29:35,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 36 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2023-12-02 14:29:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 14:29:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 14:29:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:29:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 14:29:35,555 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2023-12-02 14:29:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:29:35,556 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 14:29:35,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:29:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 14:29:35,556 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 14:29:35,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2023-12-02 14:29:35,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2023-12-02 14:29:35,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:29:35,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:29:35,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 14:29:35,799 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 525 531) the Hoare annotation is: true [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point ldv_mallocEXIT(lines 525 531) no Hoare annotation was computed. [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point L667(line 667) no Hoare annotation was computed. [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point L667-1(line 667) no Hoare annotation was computed. [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point ldv_kobject_create_returnLabel#1(lines 738 747) no Hoare annotation was computed. [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point ldv_kobject_init_returnLabel#1(lines 728 737) no Hoare annotation was computed. [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point L742(lines 742 743) no Hoare annotation was computed. [2023-12-02 14:29:35,799 INFO L899 garLoopResultBuilder]: For program point L709(lines 709 714) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 667) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L895 garLoopResultBuilder]: At program point L-1-2(line -1) the Hoare annotation is: (or (not (= |ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base| 0)) (not (= 0 |ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset|))) [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point L730(lines 730 732) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L895 garLoopResultBuilder]: At program point L726(line 726) the Hoare annotation is: (and (= |ULTIMATE.start_ldv_kobject_init_~kobj#1.base| |ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base|) (= |ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset| |ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset|) (= |ULTIMATE.start_ldv_kobject_init_~kobj#1.offset| |ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset|) (= |ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base| |ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|) (+ 12 |ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|)) 1) (or (not (= |ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base| 0)) (not (= |ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset| 0)))) [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point L726-1(lines 721 727) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 667) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point L723(lines 723 724) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 14:29:35,800 INFO L899 garLoopResultBuilder]: For program point L711(lines 711 713) no Hoare annotation was computed. [2023-12-02 14:29:35,801 INFO L902 garLoopResultBuilder]: At program point L741(line 741) the Hoare annotation is: true [2023-12-02 14:29:35,801 INFO L899 garLoopResultBuilder]: For program point L741-1(line 741) no Hoare annotation was computed. [2023-12-02 14:29:35,801 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 538 542) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2023-12-02 14:29:35,801 INFO L899 garLoopResultBuilder]: For program point LDV_INIT_LIST_HEADEXIT(lines 538 542) no Hoare annotation was computed. [2023-12-02 14:29:35,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-02 14:29:35,805 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:29:35,810 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable ~kobj~1 [2023-12-02 14:29:35,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:29:35 BoogieIcfgContainer [2023-12-02 14:29:35,812 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:29:35,813 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:29:35,813 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:29:35,813 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:29:35,813 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:29:23" (3/4) ... [2023-12-02 14:29:35,815 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 14:29:35,817 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_malloc [2023-12-02 14:29:35,817 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure LDV_INIT_LIST_HEAD [2023-12-02 14:29:35,821 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 35 nodes and edges [2023-12-02 14:29:35,822 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-12-02 14:29:35,822 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-12-02 14:29:35,822 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 14:29:35,898 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 14:29:35,899 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 14:29:35,899 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:29:35,900 INFO L158 Benchmark]: Toolchain (without parser) took 13286.85ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 151.2MB in the beginning and 226.6MB in the end (delta: -75.4MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,900 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 123.7MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:29:35,900 INFO L158 Benchmark]: CACSL2BoogieTranslator took 468.29ms. Allocated memory is still 186.6MB. Free memory was 150.6MB in the beginning and 145.5MB in the end (delta: 5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,901 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.86ms. Allocated memory is still 186.6MB. Free memory was 145.5MB in the beginning and 142.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,901 INFO L158 Benchmark]: Boogie Preprocessor took 32.12ms. Allocated memory is still 186.6MB. Free memory was 142.9MB in the beginning and 141.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,902 INFO L158 Benchmark]: RCFGBuilder took 496.23ms. Allocated memory is still 186.6MB. Free memory was 141.3MB in the beginning and 115.1MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,902 INFO L158 Benchmark]: TraceAbstraction took 12150.13ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 114.6MB in the beginning and 231.8MB in the end (delta: -117.3MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,903 INFO L158 Benchmark]: Witness Printer took 85.91ms. Allocated memory is still 325.1MB. Free memory was 231.8MB in the beginning and 226.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 14:29:35,905 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 123.7MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 468.29ms. Allocated memory is still 186.6MB. Free memory was 150.6MB in the beginning and 145.5MB in the end (delta: 5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.86ms. Allocated memory is still 186.6MB. Free memory was 145.5MB in the beginning and 142.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.12ms. Allocated memory is still 186.6MB. Free memory was 142.9MB in the beginning and 141.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 496.23ms. Allocated memory is still 186.6MB. Free memory was 141.3MB in the beginning and 115.1MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 12150.13ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 114.6MB in the beginning and 231.8MB in the end (delta: -117.3MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Witness Printer took 85.91ms. Allocated memory is still 325.1MB. Free memory was 231.8MB in the beginning and 226.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable ~kobj~1 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 667]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 667]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 246 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 63 IncrementalHoareTripleChecker+Unchecked, 177 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 351 IncrementalHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 69 mSDtfsCounter, 351 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 8 PreInvPairs, 12 NumberOfFragments, 45 HoareAnnotationTreeSize, 8 FomulaSimplifications, 83 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 120 ConstructedInterpolants, 2 QuantifiedInterpolants, 454 SizeOfPredicates, 75 NumberOfNonLiveVariables, 434 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: null RESULT: Ultimate proved your program to be correct! [2023-12-02 14:29:35,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f7cd1fe-bd50-4812-bf30-f4c667752a6e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE