./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-middle-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-middle-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 55fed19fd46c3c3877aeb4601619875fca08ed123cdc32456163a7ce3c0dda73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:11:19,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:11:19,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-23 21:11:19,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:11:19,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:11:19,230 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:11:19,231 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:11:19,232 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:11:19,233 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:11:19,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:11:19,234 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:11:19,235 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:11:19,236 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:11:19,236 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:11:19,237 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:11:19,238 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:11:19,238 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:11:19,239 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:11:19,240 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:11:19,240 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:11:19,241 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:11:19,242 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:11:19,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:11:19,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:11:19,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:11:19,245 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:11:19,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:11:19,246 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:11:19,257 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:11:19,257 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:11:19,258 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:11:19,258 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:11:19,259 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:11:19,259 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:11:19,260 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:11:19,260 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:11:19,260 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:11:19,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:19,261 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:11:19,261 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:11:19,262 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:11:19,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:11:19,263 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:11:19,263 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:11:19,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:11:19,264 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_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55fed19fd46c3c3877aeb4601619875fca08ed123cdc32456163a7ce3c0dda73 [2023-11-23 21:11:19,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:11:19,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:11:19,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:11:19,640 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:11:19,640 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:11:19,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/memsafety-broom/dll-middle-data.i [2023-11-23 21:11:22,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:11:23,122 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:11:23,123 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/sv-benchmarks/c/memsafety-broom/dll-middle-data.i [2023-11-23 21:11:23,168 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/data/89558fd1e/4b8e6e9956404f89bdcd68413b335139/FLAG09da28874 [2023-11-23 21:11:23,182 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/data/89558fd1e/4b8e6e9956404f89bdcd68413b335139 [2023-11-23 21:11:23,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:11:23,186 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:11:23,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:23,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:11:23,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:11:23,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43302dc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23, skipping insertion in model container [2023-11-23 21:11:23,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,291 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:11:23,445 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:11:23,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:23,589 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:11:23,628 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 21:11:23,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:23,699 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:23,707 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:11:23,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23 WrapperNode [2023-11-23 21:11:23,708 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:23,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:23,709 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:11:23,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:11:23,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,757 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,793 INFO L138 Inliner]: procedures = 122, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2023-11-23 21:11:23,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:23,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:11:23,794 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:11:23,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:11:23,804 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,819 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:11:23,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:11:23,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:11:23,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:11:23,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (1/1) ... [2023-11-23 21:11:23,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:23,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:11:23,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:11:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:11:23,993 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-23 21:11:23,993 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-23 21:11:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:11:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:11:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:11:23,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:11:23,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:11:23,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:11:24,121 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:11:24,123 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:11:24,541 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:11:24,676 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:11:24,676 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:11:24,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:24 BoogieIcfgContainer [2023-11-23 21:11:24,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:11:24,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:11:24,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:11:24,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:11:24,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:11:23" (1/3) ... [2023-11-23 21:11:24,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51567f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:24, skipping insertion in model container [2023-11-23 21:11:24,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:23" (2/3) ... [2023-11-23 21:11:24,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51567f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:24, skipping insertion in model container [2023-11-23 21:11:24,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:24" (3/3) ... [2023-11-23 21:11:24,696 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-middle-data.i [2023-11-23 21:11:24,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:11:24,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-11-23 21:11:24,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:11:24,781 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46e75b31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:11:24,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-23 21:11:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:11:24,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:24,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:11:24,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:24,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 5092341, now seen corresponding path program 1 times [2023-11-23 21:11:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:24,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409383713] [2023-11-23 21:11:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:25,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:25,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409383713] [2023-11-23 21:11:25,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409383713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:25,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:25,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:11:25,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220372389] [2023-11-23 21:11:25,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:25,234 INFO L87 Difference]: Start difference. First operand has 68 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 64 states have internal predecessors, (68), 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:11:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:25,421 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-11-23 21:11:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:11:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:25,434 INFO L225 Difference]: With dead ends: 64 [2023-11-23 21:11:25,434 INFO L226 Difference]: Without dead ends: 63 [2023-11-23 21:11:25,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:25,443 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:25,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-23 21:11:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-23 21:11:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2023-11-23 21:11:25,508 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 4 [2023-11-23 21:11:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:25,509 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2023-11-23 21:11:25,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:11:25,510 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2023-11-23 21:11:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:11:25,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:25,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:11:25,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:11:25,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:25,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash 5092342, now seen corresponding path program 1 times [2023-11-23 21:11:25,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:25,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040665099] [2023-11-23 21:11:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:25,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:25,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040665099] [2023-11-23 21:11:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040665099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:25,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:11:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157699454] [2023-11-23 21:11:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:25,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:11:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:11:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:25,681 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:11:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:25,801 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-11-23 21:11:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:11:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:11:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:25,804 INFO L225 Difference]: With dead ends: 59 [2023-11-23 21:11:25,805 INFO L226 Difference]: Without dead ends: 59 [2023-11-23 21:11:25,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:11:25,811 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:25,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-23 21:11:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-23 21:11:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-11-23 21:11:25,829 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 4 [2023-11-23 21:11:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:25,829 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-11-23 21:11:25,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:11:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-11-23 21:11:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:11:25,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:25,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:11:25,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:25,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:25,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1088257845, now seen corresponding path program 1 times [2023-11-23 21:11:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:25,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653597016] [2023-11-23 21:11:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:25,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:26,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:26,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653597016] [2023-11-23 21:11:26,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653597016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:26,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:26,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:11:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124951515] [2023-11-23 21:11:26,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:26,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:26,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:26,199 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:26,420 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-11-23 21:11:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:11:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2023-11-23 21:11:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:26,430 INFO L225 Difference]: With dead ends: 57 [2023-11-23 21:11:26,430 INFO L226 Difference]: Without dead ends: 57 [2023-11-23 21:11:26,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:26,440 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:26,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-23 21:11:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-11-23 21:11:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2023-11-23 21:11:26,454 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 10 [2023-11-23 21:11:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:26,454 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2023-11-23 21:11:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2023-11-23 21:11:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:11:26,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:26,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:26,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:11:26,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:26,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1088257846, now seen corresponding path program 1 times [2023-11-23 21:11:26,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:26,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372655189] [2023-11-23 21:11:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:26,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:26,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372655189] [2023-11-23 21:11:26,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372655189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:26,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:26,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:11:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675685234] [2023-11-23 21:11:26,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:26,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:26,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:26,730 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:26,897 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-11-23 21:11:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:11:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2023-11-23 21:11:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:26,901 INFO L225 Difference]: With dead ends: 55 [2023-11-23 21:11:26,901 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 21:11:26,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:26,909 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:26,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 104 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 21:11:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-11-23 21:11:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-11-23 21:11:26,923 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 10 [2023-11-23 21:11:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:26,924 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-11-23 21:11:26,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-11-23 21:11:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:11:26,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:26,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:11:26,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:26,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1724489561, now seen corresponding path program 1 times [2023-11-23 21:11:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:26,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607494854] [2023-11-23 21:11:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:26,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:27,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:27,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607494854] [2023-11-23 21:11:27,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607494854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:27,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578901044] [2023-11-23 21:11:27,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:27,165 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:27,320 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-23 21:11:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2023-11-23 21:11:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:27,331 INFO L225 Difference]: With dead ends: 58 [2023-11-23 21:11:27,332 INFO L226 Difference]: Without dead ends: 58 [2023-11-23 21:11:27,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:27,334 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:27,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 122 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-23 21:11:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-23 21:11:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-23 21:11:27,354 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 16 [2023-11-23 21:11:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:27,354 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-23 21:11:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-23 21:11:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:11:27,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:27,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:27,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:11:27,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:27,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1724489562, now seen corresponding path program 1 times [2023-11-23 21:11:27,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:27,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414976718] [2023-11-23 21:11:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:27,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414976718] [2023-11-23 21:11:27,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414976718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:27,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:27,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543363397] [2023-11-23 21:11:27,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:27,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:27,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:27,654 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:27,825 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-23 21:11:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:27,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2023-11-23 21:11:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:27,827 INFO L225 Difference]: With dead ends: 57 [2023-11-23 21:11:27,827 INFO L226 Difference]: Without dead ends: 57 [2023-11-23 21:11:27,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:27,828 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:27,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-23 21:11:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-23 21:11:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 52 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2023-11-23 21:11:27,834 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 16 [2023-11-23 21:11:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:27,834 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2023-11-23 21:11:27,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2023-11-23 21:11:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:11:27,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:27,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:27,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:11:27,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:27,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1919585171, now seen corresponding path program 1 times [2023-11-23 21:11:27,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:27,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186962424] [2023-11-23 21:11:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:27,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:27,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186962424] [2023-11-23 21:11:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186962424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:27,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:27,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:11:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913731667] [2023-11-23 21:11:27,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:27,964 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:28,077 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2023-11-23 21:11:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 17 [2023-11-23 21:11:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:28,079 INFO L225 Difference]: With dead ends: 60 [2023-11-23 21:11:28,079 INFO L226 Difference]: Without dead ends: 60 [2023-11-23 21:11:28,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:28,080 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:28,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 177 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-23 21:11:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2023-11-23 21:11:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-11-23 21:11:28,085 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 17 [2023-11-23 21:11:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:28,086 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-11-23 21:11:28,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-11-23 21:11:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:11:28,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:28,087 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:28,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:11:28,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:28,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash -622863686, now seen corresponding path program 1 times [2023-11-23 21:11:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883287102] [2023-11-23 21:11:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:29,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:29,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883287102] [2023-11-23 21:11:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883287102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:29,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153711763] [2023-11-23 21:11:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:29,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:29,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:29,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:11:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:29,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-23 21:11:29,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:29,250 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 13 treesize of output 9 [2023-11-23 21:11:29,256 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 13 treesize of output 9 [2023-11-23 21:11:29,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 21:11:29,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 21:11:29,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:11:29,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:11:29,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 21:11:29,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 21:11:29,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:11:29,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 21:11:29,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 21:11:29,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 21:11:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:29,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:29,850 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 20 |c_ULTIMATE.start_create_~now~0#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4))) (and (forall ((v_ArrVal_261 (Array Int Int))) (or (not (= v_ArrVal_261 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_261 .cse0)))) (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse1)))) (forall ((v_ArrVal_262 (Array Int Int))) (or (not (= v_ArrVal_262 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) .cse0 (select v_ArrVal_262 .cse0)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_262) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse1) 0))))) is different from false [2023-11-23 21:11:29,917 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4)) (.cse1 (+ 20 |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_262 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_262) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse0) 0) (not (= v_ArrVal_262 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_262 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse1 (select v_ArrVal_262 .cse1)))))) (forall ((v_ArrVal_261 (Array Int Int))) (or (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse0)) (not (= v_ArrVal_261 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| (select v_ArrVal_261 |c_ULTIMATE.start_create_~now~0#1.offset|)) .cse1 (select v_ArrVal_261 .cse1)))))))) is different from false [2023-11-23 21:11:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153711763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:11:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557993065] [2023-11-23 21:11:30,460 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-23 21:11:30,460 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:11:30,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:11:30,470 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:11:30,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:11:31,746 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-23 21:11:31,790 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:11:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [557993065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:42,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:11:42,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10, 9, 10] total 32 [2023-11-23 21:11:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729548839] [2023-11-23 21:11:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:42,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:11:42,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:11:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=765, Unknown=4, NotChecked=114, Total=992 [2023-11-23 21:11:42,060 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:44,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:11:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:50,124 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-11-23 21:11:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:11:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 18 [2023-11-23 21:11:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:50,126 INFO L225 Difference]: With dead ends: 66 [2023-11-23 21:11:50,126 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 21:11:50,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=109, Invalid=765, Unknown=4, NotChecked=114, Total=992 [2023-11-23 21:11:50,127 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:50,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 706 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2023-11-23 21:11:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 21:11:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2023-11-23 21:11:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.6) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-11-23 21:11:50,132 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 18 [2023-11-23 21:11:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:50,132 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-11-23 21:11:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-11-23 21:11:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:11:50,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:50,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:50,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:50,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:50,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:50,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2128888750, now seen corresponding path program 1 times [2023-11-23 21:11:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:50,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391003510] [2023-11-23 21:11:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:50,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391003510] [2023-11-23 21:11:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391003510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:50,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:50,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:11:50,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105102086] [2023-11-23 21:11:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:50,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:11:50,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:11:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:50,537 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:50,825 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-23 21:11:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:11:50,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 19 [2023-11-23 21:11:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:50,826 INFO L225 Difference]: With dead ends: 73 [2023-11-23 21:11:50,826 INFO L226 Difference]: Without dead ends: 73 [2023-11-23 21:11:50,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:50,827 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:50,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 158 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-23 21:11:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2023-11-23 21:11:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-23 21:11:50,831 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 19 [2023-11-23 21:11:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:50,831 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-23 21:11:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-23 21:11:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:11:50,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:50,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:50,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:11:50,836 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:50,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2128890097, now seen corresponding path program 1 times [2023-11-23 21:11:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332668566] [2023-11-23 21:11:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:51,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:51,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332668566] [2023-11-23 21:11:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332668566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:51,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:11:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17940976] [2023-11-23 21:11:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:51,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:11:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:11:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:51,030 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:51,375 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-23 21:11:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:11:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 19 [2023-11-23 21:11:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:51,377 INFO L225 Difference]: With dead ends: 73 [2023-11-23 21:11:51,377 INFO L226 Difference]: Without dead ends: 73 [2023-11-23 21:11:51,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:51,378 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:51,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 117 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:11:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-23 21:11:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2023-11-23 21:11:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.558139534883721) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-11-23 21:11:51,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 19 [2023-11-23 21:11:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:51,383 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-11-23 21:11:51,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-11-23 21:11:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:11:51,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:51,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:51,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:11:51,385 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:51,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:51,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2128890096, now seen corresponding path program 1 times [2023-11-23 21:11:51,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:51,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239071757] [2023-11-23 21:11:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:51,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:51,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239071757] [2023-11-23 21:11:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239071757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:51,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:51,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:11:51,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689346216] [2023-11-23 21:11:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:51,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:11:51,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:11:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:51,673 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:52,079 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-11-23 21:11:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:11:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 19 [2023-11-23 21:11:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:52,082 INFO L225 Difference]: With dead ends: 82 [2023-11-23 21:11:52,082 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 21:11:52,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:52,083 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:52,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 101 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:11:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 21:11:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2023-11-23 21:11:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:11:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-11-23 21:11:52,088 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 19 [2023-11-23 21:11:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:52,089 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-11-23 21:11:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-11-23 21:11:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:11:52,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:52,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:52,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:11:52,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:52,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 918695024, now seen corresponding path program 1 times [2023-11-23 21:11:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489042138] [2023-11-23 21:11:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:52,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489042138] [2023-11-23 21:11:52,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489042138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913085720] [2023-11-23 21:11:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:52,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:52,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:52,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:11:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:52,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:11:52,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:52,595 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-23 21:11:52,672 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-23 21:11:52,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-23 21:11:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:52,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:52,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913085720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:52,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:52,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2023-11-23 21:11:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032355029] [2023-11-23 21:11:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:11:52,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:11:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-11-23 21:11:52,681 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2023-11-23 21:11:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:52,791 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-11-23 21:11:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:11:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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) Word has length 21 [2023-11-23 21:11:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:52,792 INFO L225 Difference]: With dead ends: 70 [2023-11-23 21:11:52,793 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 21:11:52,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-11-23 21:11:52,794 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:52,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2023-11-23 21:11:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 21:11:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-11-23 21:11:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 63 states have internal predecessors, (69), 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) [2023-11-23 21:11:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-11-23 21:11:52,799 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 21 [2023-11-23 21:11:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:52,799 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-11-23 21:11:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2023-11-23 21:11:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-11-23 21:11:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:11:52,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:52,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:52,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:53,021 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:53,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 918695025, now seen corresponding path program 1 times [2023-11-23 21:11:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:53,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364043365] [2023-11-23 21:11:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:53,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:53,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364043365] [2023-11-23 21:11:53,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364043365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:53,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429731132] [2023-11-23 21:11:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:53,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:53,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:53,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:11:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:53,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:11:53,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:53,828 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-23 21:11:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:11:53,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 21:11:53,897 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 21:11:53,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 21:11:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:53,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:11:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429731132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:53,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:11:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-23 21:11:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033648468] [2023-11-23 21:11:53,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-11-23 21:11:53,934 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2023-11-23 21:11:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:54,181 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-11-23 21:11:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) Word has length 21 [2023-11-23 21:11:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:54,183 INFO L225 Difference]: With dead ends: 82 [2023-11-23 21:11:54,183 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 21:11:54,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-11-23 21:11:54,184 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:54,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 75 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2023-11-23 21:11:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 21:11:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-11-23 21:11:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 70 states have internal predecessors, (81), 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) [2023-11-23 21:11:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2023-11-23 21:11:54,188 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2023-11-23 21:11:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:54,189 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2023-11-23 21:11:54,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2023-11-23 21:11:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2023-11-23 21:11:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:11:54,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:54,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:54,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:54,405 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:54,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1458913197, now seen corresponding path program 1 times [2023-11-23 21:11:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784934506] [2023-11-23 21:11:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:54,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784934506] [2023-11-23 21:11:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784934506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:54,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:54,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:11:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469696008] [2023-11-23 21:11:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:11:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:11:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:54,582 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:54,884 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-11-23 21:11:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:11:54,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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 21 [2023-11-23 21:11:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:54,886 INFO L225 Difference]: With dead ends: 82 [2023-11-23 21:11:54,886 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 21:11:54,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:11:54,887 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:54,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 151 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:11:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 21:11:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-11-23 21:11:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 73 states have internal predecessors, (87), 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) [2023-11-23 21:11:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2023-11-23 21:11:54,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 21 [2023-11-23 21:11:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:54,892 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2023-11-23 21:11:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:11:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2023-11-23 21:11:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:11:54,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:54,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:54,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:11:54,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:54,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1897252236, now seen corresponding path program 1 times [2023-11-23 21:11:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:54,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861252271] [2023-11-23 21:11:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:54,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:55,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861252271] [2023-11-23 21:11:55,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861252271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:55,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:55,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817993408] [2023-11-23 21:11:55,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:55,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:55,235 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:11:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:55,513 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-11-23 21:11:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-23 21:11:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:55,515 INFO L225 Difference]: With dead ends: 78 [2023-11-23 21:11:55,515 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 21:11:55,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:11:55,516 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:55,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 21:11:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-23 21:11:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 72 states have internal predecessors, (85), 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) [2023-11-23 21:11:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-11-23 21:11:55,521 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 23 [2023-11-23 21:11:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:55,521 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-11-23 21:11:55,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:11:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-11-23 21:11:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:11:55,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:55,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:55,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 21:11:55,523 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:55,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1897252237, now seen corresponding path program 1 times [2023-11-23 21:11:55,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:55,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009218751] [2023-11-23 21:11:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:11:55,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009218751] [2023-11-23 21:11:55,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009218751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772307965] [2023-11-23 21:11:55,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:55,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:55,746 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:11:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:56,010 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-11-23 21:11:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-23 21:11:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:56,011 INFO L225 Difference]: With dead ends: 77 [2023-11-23 21:11:56,011 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 21:11:56,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:11:56,012 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:56,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 110 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 21:11:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-23 21:11:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.509090909090909) internal successors, (83), 71 states have internal predecessors, (83), 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) [2023-11-23 21:11:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-11-23 21:11:56,016 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 23 [2023-11-23 21:11:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:56,017 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-11-23 21:11:56,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:11:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-11-23 21:11:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:11:56,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:56,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:56,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 21:11:56,018 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-11-23 21:11:56,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1708840574, now seen corresponding path program 1 times [2023-11-23 21:11:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899792886] [2023-11-23 21:11:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:56,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:56,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899792886] [2023-11-23 21:11:56,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899792886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:56,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364823262] [2023-11-23 21:11:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:56,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:56,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:56,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:56,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8665eca0-64b6-4b69-9827-62f87d79a395/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:11:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:56,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 21:11:56,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:56,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:11:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:11:56,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:56,731 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_19| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_19|) 0)) (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_19| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2023-11-23 21:11:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364823262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363192953] [2023-11-23 21:11:56,736 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:11:56,736 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:11:56,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:11:56,737 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:11:56,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:11:58,694 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-11-23 21:11:58,733 INFO L180 IcfgInterpreter]: Interpretation finished