./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:00:36,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:00:36,434 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-25 00:00:36,450 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:00:36,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:00:36,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:00:36,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:00:36,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:00:36,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:00:36,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:00:36,513 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:00:36,514 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:00:36,515 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:00:36,517 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:00:36,518 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:00:36,519 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:00:36,522 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:00:36,523 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:00:36,523 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:00:36,524 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:00:36,525 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:00:36,526 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:00:36,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-25 00:00:36,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-25 00:00:36,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:00:36,531 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:00:36,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:00:36,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:00:36,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:00:36,534 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-25 00:00:36,536 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-25 00:00:36,537 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-25 00:00:36,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:00:36,538 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:00:36,538 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:00:36,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:00:36,539 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:00:36,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:00:36,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:00:36,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:00:36,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:36,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:00:36,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:00:36,543 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:00:36,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:00:36,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:00:36,545 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:00:36,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:00:36,546 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_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-11-25 00:00:37,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:00:37,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:00:37,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:00:37,070 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:00:37,071 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:00:37,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-25 00:00:41,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:00:41,367 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:00:41,368 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-25 00:00:41,380 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/data/dd4ff074c/c29857316db844c39adb8b124a11e439/FLAGb892273cd [2023-11-25 00:00:41,407 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/data/dd4ff074c/c29857316db844c39adb8b124a11e439 [2023-11-25 00:00:41,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:00:41,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:00:41,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:41,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:00:41,429 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:00:41,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31fd4975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41, skipping insertion in model container [2023-11-25 00:00:41,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:00:41,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:41,840 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:00:41,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:41,937 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:00:41,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41 WrapperNode [2023-11-25 00:00:41,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:41,940 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:41,940 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:00:41,940 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:00:41,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,034 INFO L138 Inliner]: procedures = 22, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 136 [2023-11-25 00:00:42,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:42,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:00:42,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:00:42,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:00:42,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,133 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:00:42,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:00:42,135 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:00:42,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:00:42,137 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:42,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:42,179 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:00:42,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:00:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:00:42,234 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:00:42,234 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:00:42,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:00:42,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:00:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:00:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:00:42,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:00:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:00:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-25 00:00:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-25 00:00:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:00:42,363 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:00:42,367 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:00:42,976 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:00:43,154 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:00:43,154 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-25 00:00:43,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:43 BoogieIcfgContainer [2023-11-25 00:00:43,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:00:43,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:00:43,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:00:43,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:00:43,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:00:41" (1/3) ... [2023-11-25 00:00:43,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14baff33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:43, skipping insertion in model container [2023-11-25 00:00:43,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (2/3) ... [2023-11-25 00:00:43,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14baff33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:43, skipping insertion in model container [2023-11-25 00:00:43,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:43" (3/3) ... [2023-11-25 00:00:43,171 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-11-25 00:00:43,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:00:43,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-25 00:00:43,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:00:43,304 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;@56d04eb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:00:43,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-25 00:00:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:00:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:00:43,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:43,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:43,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:43,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1400246135, now seen corresponding path program 1 times [2023-11-25 00:00:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:43,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000159508] [2023-11-25 00:00:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:43,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:00:44,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:44,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000159508] [2023-11-25 00:00:44,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000159508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:44,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:44,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992397177] [2023-11-25 00:00:44,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:44,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:00:44,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:00:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:00:44,339 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:44,635 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-11-25 00:00:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:00:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2023-11-25 00:00:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:44,654 INFO L225 Difference]: With dead ends: 76 [2023-11-25 00:00:44,655 INFO L226 Difference]: Without dead ends: 75 [2023-11-25 00:00:44,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:44,664 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:44,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 63 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:00:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-25 00:00:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-25 00:00:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:00:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-11-25 00:00:44,747 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2023-11-25 00:00:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:44,749 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-11-25 00:00:44,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-11-25 00:00:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:00:44,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:44,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:44,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:00:44,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:44,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1400246134, now seen corresponding path program 1 times [2023-11-25 00:00:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:44,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473209172] [2023-11-25 00:00:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:00:45,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473209172] [2023-11-25 00:00:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473209172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:45,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:45,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:00:45,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588961191] [2023-11-25 00:00:45,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:00:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:00:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:00:45,827 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:00:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:47,122 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2023-11-25 00:00:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:00:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-11-25 00:00:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:47,128 INFO L225 Difference]: With dead ends: 201 [2023-11-25 00:00:47,128 INFO L226 Difference]: Without dead ends: 201 [2023-11-25 00:00:47,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:00:47,136 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 580 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:47,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 193 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:00:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-25 00:00:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 106. [2023-11-25 00:00:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 96 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:00:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2023-11-25 00:00:47,175 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 20 [2023-11-25 00:00:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:47,176 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2023-11-25 00:00:47,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:00:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2023-11-25 00:00:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:00:47,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:47,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:00:47,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:47,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -457957218, now seen corresponding path program 1 times [2023-11-25 00:00:47,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:47,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510305362] [2023-11-25 00:00:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:47,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:00:47,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:47,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510305362] [2023-11-25 00:00:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510305362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:47,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:47,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:47,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492350774] [2023-11-25 00:00:47,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:00:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:00:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:00:47,335 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:00:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:47,478 INFO L93 Difference]: Finished difference Result 105 states and 149 transitions. [2023-11-25 00:00:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:00:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-25 00:00:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:47,481 INFO L225 Difference]: With dead ends: 105 [2023-11-25 00:00:47,481 INFO L226 Difference]: Without dead ends: 105 [2023-11-25 00:00:47,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:47,483 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:47,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 67 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-25 00:00:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-25 00:00:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 2.076923076923077) internal successors, (135), 95 states have internal predecessors, (135), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:00:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 149 transitions. [2023-11-25 00:00:47,498 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 149 transitions. Word has length 21 [2023-11-25 00:00:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:47,499 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 149 transitions. [2023-11-25 00:00:47,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:00:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 149 transitions. [2023-11-25 00:00:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:00:47,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:47,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:00:47,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:47,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -457957217, now seen corresponding path program 1 times [2023-11-25 00:00:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:47,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354428279] [2023-11-25 00:00:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:00:47,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354428279] [2023-11-25 00:00:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354428279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:47,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:47,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:00:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727076625] [2023-11-25 00:00:47,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:47,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:00:47,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:47,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:00:47,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:00:47,958 INFO L87 Difference]: Start difference. First operand 105 states and 149 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:48,514 INFO L93 Difference]: Finished difference Result 181 states and 258 transitions. [2023-11-25 00:00:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:00:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-11-25 00:00:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:48,518 INFO L225 Difference]: With dead ends: 181 [2023-11-25 00:00:48,518 INFO L226 Difference]: Without dead ends: 181 [2023-11-25 00:00:48,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:00:48,520 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 299 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:48,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 66 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:00:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-25 00:00:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 107. [2023-11-25 00:00:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 2.014705882352941) internal successors, (137), 97 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:00:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2023-11-25 00:00:48,535 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 21 [2023-11-25 00:00:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:48,535 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2023-11-25 00:00:48,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2023-11-25 00:00:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:00:48,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:48,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:48,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:00:48,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:48,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash -457773465, now seen corresponding path program 1 times [2023-11-25 00:00:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:48,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701503181] [2023-11-25 00:00:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:00:48,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:48,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701503181] [2023-11-25 00:00:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701503181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:48,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:48,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:00:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134689518] [2023-11-25 00:00:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:00:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:00:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:48,697 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:48,860 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-11-25 00:00:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:00:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-11-25 00:00:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:48,863 INFO L225 Difference]: With dead ends: 101 [2023-11-25 00:00:48,863 INFO L226 Difference]: Without dead ends: 101 [2023-11-25 00:00:48,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:00:48,865 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 115 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:48,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 82 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-25 00:00:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-25 00:00:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.838235294117647) internal successors, (125), 91 states have internal predecessors, (125), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:00:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2023-11-25 00:00:48,877 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 21 [2023-11-25 00:00:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:48,878 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2023-11-25 00:00:48,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2023-11-25 00:00:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:00:48,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:48,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:48,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:00:48,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:48,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -457773464, now seen corresponding path program 1 times [2023-11-25 00:00:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:48,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333748689] [2023-11-25 00:00:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:00:49,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:49,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333748689] [2023-11-25 00:00:49,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333748689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:49,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:49,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:00:49,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373937036] [2023-11-25 00:00:49,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:49,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:00:49,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:00:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:00:49,136 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:49,432 INFO L93 Difference]: Finished difference Result 155 states and 197 transitions. [2023-11-25 00:00:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:00:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-11-25 00:00:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:49,440 INFO L225 Difference]: With dead ends: 155 [2023-11-25 00:00:49,440 INFO L226 Difference]: Without dead ends: 155 [2023-11-25 00:00:49,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:00:49,447 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 129 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:49,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 403 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:00:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-25 00:00:49,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2023-11-25 00:00:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 91 states have internal predecessors, (124), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:00:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2023-11-25 00:00:49,462 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 21 [2023-11-25 00:00:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:49,463 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2023-11-25 00:00:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:00:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2023-11-25 00:00:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:00:49,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:49,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:49,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:00:49,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:00:49,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash -209993497, now seen corresponding path program 1 times [2023-11-25 00:00:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:49,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069992464] [2023-11-25 00:00:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:00:50,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:50,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069992464] [2023-11-25 00:00:50,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069992464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:50,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62946272] [2023-11-25 00:00:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:50,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:50,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:50,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:50,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:00:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:50,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:00:50,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:50,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-25 00:00:50,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-25 00:00:50,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:00:50,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-25 00:00:50,846 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-25 00:00:50,847 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 [2023-11-25 00:00:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:00:51,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:00:51,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62946272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:00:51,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017428400] [2023-11-25 00:00:51,533 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-25 00:00:51,533 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:00:51,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:00:51,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:00:51,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:00:52,494 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-25 00:00:52,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-25 00:00:52,634 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:00:54,608 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (let ((.cse1 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse2 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse3 (exists ((|v_#valid_63| (Array Int Int))) (let ((.cse10 (store |v_#valid_63| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= |c_#valid| (store .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)) (= (select .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (select |v_#valid_63| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0))))) (.cse4 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse5 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse7 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_19| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_19| 4294967296) 1))) (.cse0 ((as const (Array Int Int)) 0)) (.cse8 (exists ((|v_#length_53| (Array Int Int))) (= (let ((.cse9 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_53| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse9) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse9)) |c_#length|)))) (or (and (exists ((|v_#memory_int_66| (Array Int (Array Int Int)))) (= (store |v_#memory_int_66| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse0) |c_#memory_int|)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (exists ((|v_#memory_int_68| (Array Int (Array Int Int)))) (= (store |v_#memory_int_68| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse0) |c_#memory_int|)) .cse8))) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from true [2023-11-25 00:00:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2017428400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:55,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:00:55,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [9, 9] total 32 [2023-11-25 00:00:55,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816787461] [2023-11-25 00:00:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:55,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:00:55,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:00:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1056, Unknown=10, NotChecked=68, Total=1332 [2023-11-25 00:00:55,804 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:00:58,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:00:59,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:01:02,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:01:05,371 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] [2023-11-25 00:01:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:07,306 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-11-25 00:01:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-25 00:01:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-11-25 00:01:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:07,308 INFO L225 Difference]: With dead ends: 114 [2023-11-25 00:01:07,308 INFO L226 Difference]: Without dead ends: 114 [2023-11-25 00:01:07,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=230, Invalid=1246, Unknown=10, NotChecked=74, Total=1560 [2023-11-25 00:01:07,310 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 1 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:07,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 664 Invalid, 30 Unknown, 107 Unchecked, 11.1s Time] [2023-11-25 00:01:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-25 00:01:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2023-11-25 00:01:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 90 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:01:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2023-11-25 00:01:07,316 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 21 [2023-11-25 00:01:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:07,317 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2023-11-25 00:01:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:01:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2023-11-25 00:01:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-25 00:01:07,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:07,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:07,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:07,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:07,525 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:01:07,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:07,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2080319915, now seen corresponding path program 1 times [2023-11-25 00:01:07,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:07,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279870099] [2023-11-25 00:01:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:07,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:01:07,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279870099] [2023-11-25 00:01:07,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279870099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842884203] [2023-11-25 00:01:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:07,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:07,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:07,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:01:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:08,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-25 00:01:08,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:01:08,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:01:08,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842884203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:08,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605322525] [2023-11-25 00:01:08,387 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-25 00:01:08,387 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:08,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:08,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:08,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:09,018 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-25 00:01:09,060 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-25 00:01:09,093 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:10,314 WARN L876 $PredicateComparison]: unable to prove that (and (let ((.cse0 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1))) (.cse1 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse2 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse3 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4)) (.cse4 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse5 (not (= |c_#Ultimate.meminit_#ptr.base| 0)))) (or (and .cse0 .cse1 .cse2 (exists ((|v_#valid_67| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_67| |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_67| |c_#Ultimate.meminit_#ptr.base|) 0))) (exists ((|v_#length_57| (Array Int Int))) (= |c_#length| (store |v_#length_57| |c_#Ultimate.meminit_#ptr.base| .cse3))) .cse4 .cse5) (and .cse0 .cse1 .cse2 (exists ((|v_#valid_67| (Array Int Int)) (|v_#memory_int_78| (Array Int (Array Int Int))) (|v_#length_57| (Array Int Int)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| Int)) (let ((.cse6 (store |v_#valid_67| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| 1))) (and (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| 0)) (= (select .cse6 |c_#Ultimate.meminit_#ptr.base|) 0) (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store .cse6 |c_#Ultimate.meminit_#ptr.base| 1)) (= |c_old(#memory_int)| (store |v_#memory_int_78| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| ((as const (Array Int Int)) 0))) (= (select |v_#valid_67| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8|) 0) (= |c_#length| (store (store |v_#length_57| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| .cse3) |c_#Ultimate.meminit_#ptr.base| .cse3))))) .cse4 .cse5))) (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-11-25 00:01:11,152 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (let ((.cse0 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse1 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1))) (.cse2 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse3 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse4 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse6 (exists ((|v_#valid_67| (Array Int Int))) (let ((.cse10 (store |v_#valid_67| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= (select |v_#valid_67| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0) (= (select .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= |c_#valid| (store .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)))))) (.cse7 ((as const (Array Int Int)) 0)) (.cse8 (exists ((|v_#length_57| (Array Int Int))) (= |c_#length| (let ((.cse9 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_57| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse9) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse9)))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (exists ((|v_#memory_int_79| (Array Int (Array Int Int)))) (= (store |v_#memory_int_79| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7) |c_#memory_int|)) .cse8) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (exists ((|v_#memory_int_80| (Array Int (Array Int Int)))) (= (store |v_#memory_int_80| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7) |c_#memory_int|)) .cse8)))) is different from true [2023-11-25 00:01:11,435 WARN L876 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_upsweep_~n#1|) (= |c_ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |c_ULTIMATE.start_main_#t~malloc16#1.base| |c_ULTIMATE.start_main_~a0~0#1.base|) (= |c_ULTIMATE.start_upsweep_#in~a#1.base| |c_ULTIMATE.start_main_~a~0#1.base|) (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (= |c_ULTIMATE.start_upsweep_#in~n#1| 0) (let ((.cse0 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse1 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1))) (.cse2 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse3 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse4 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse6 (exists ((|v_#valid_67| (Array Int Int))) (let ((.cse9 (store |v_#valid_67| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= (select |v_#valid_67| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0) (= (select .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= |c_#valid| (store .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)))))) (.cse7 (exists ((|v_#length_57| (Array Int Int))) (= (store (store |v_#length_57| |c_ULTIMATE.start_main_#t~malloc15#1.base| 0) |c_ULTIMATE.start_main_#t~malloc16#1.base| 0) |c_#length|))) (.cse8 ((as const (Array Int Int)) 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (exists ((|v_#memory_int_80| (Array Int (Array Int Int)))) (= (store |v_#memory_int_80| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse8) |c_#memory_int|))) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (exists ((|v_#memory_int_79| (Array Int (Array Int Int)))) (= (store |v_#memory_int_79| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse8) |c_#memory_int|))))) (= |c_ULTIMATE.start_upsweep_~a#1.offset| 0) (= |c_ULTIMATE.start_main_~n~0#1| 0) (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~1#1| 0) (= |c_ULTIMATE.start_upsweep_~a#1.base| |c_ULTIMATE.start_upsweep_#in~a#1.base|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_upsweep_~space~0#1| 1)) is different from true [2023-11-25 00:01:11,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2051#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~n#1| 0) (= |ULTIMATE.start_downsweep_~n#1| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~space~1#1| 1) (= |ULTIMATE.start_upsweep_#res#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_main_#t~malloc16#1.base|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (or (and (<= (+ |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1)) (exists ((|v_#valid_67| (Array Int Int))) (and (= (select (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (store (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#valid|) (= (select |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base|) 0))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (exists ((|v_#memory_int_79| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_79| |ULTIMATE.start_main_#t~malloc16#1.base| ((as const (Array Int Int)) 0)))) (exists ((|v_#length_57| (Array Int Int))) (= |#length| (store (store |v_#length_57| |ULTIMATE.start_main_#t~malloc15#1.base| 0) |ULTIMATE.start_main_#t~malloc16#1.base| 0))) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (<= (+ |ULTIMATE.start_main_#t~malloc15#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0))) (and (<= (+ |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1)) (exists ((|v_#valid_67| (Array Int Int))) (and (= (select (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (store (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#valid|) (= (select |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base|) 0))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (exists ((|v_#length_57| (Array Int Int))) (= |#length| (store (store |v_#length_57| |ULTIMATE.start_main_#t~malloc15#1.base| 0) |ULTIMATE.start_main_#t~malloc16#1.base| 0))) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (<= (+ |ULTIMATE.start_main_#t~malloc15#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_80| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_80| |ULTIMATE.start_main_#t~malloc16#1.base| ((as const (Array Int Int)) 0)))) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0)))) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_downsweep_#in~space#1| 1) (= |ULTIMATE.start_downsweep_~a#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= 1 |ULTIMATE.start_downsweep_~space#1|))' at error location [2023-11-25 00:01:11,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:11,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:01:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-11-25 00:01:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196230167] [2023-11-25 00:01:11,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:01:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:01:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=732, Unknown=10, NotChecked=174, Total=1056 [2023-11-25 00:01:11,443 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-25 00:01:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:11,913 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-11-25 00:01:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:01:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 22 [2023-11-25 00:01:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:11,915 INFO L225 Difference]: With dead ends: 134 [2023-11-25 00:01:11,915 INFO L226 Difference]: Without dead ends: 134 [2023-11-25 00:01:11,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=177, Invalid=881, Unknown=10, NotChecked=192, Total=1260 [2023-11-25 00:01:11,917 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 317 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:11,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 705 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:01:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-25 00:01:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2023-11-25 00:01:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:01:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-11-25 00:01:11,922 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 22 [2023-11-25 00:01:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:11,923 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-11-25 00:01:11,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-25 00:01:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-11-25 00:01:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-25 00:01:11,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:11,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:11,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:12,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:12,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:01:12,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2010062682, now seen corresponding path program 1 times [2023-11-25 00:01:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:12,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370092993] [2023-11-25 00:01:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:12,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:01:12,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370092993] [2023-11-25 00:01:12,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370092993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641996361] [2023-11-25 00:01:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:12,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:12,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:12,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:12,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:01:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:12,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:01:12,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:01:12,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:12,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641996361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:12,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:12,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2023-11-25 00:01:12,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89896694] [2023-11-25 00:01:12,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:12,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:01:12,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:01:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:01:12,718 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:01:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:12,965 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2023-11-25 00:01:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:01:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-11-25 00:01:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:12,967 INFO L225 Difference]: With dead ends: 130 [2023-11-25 00:01:12,967 INFO L226 Difference]: Without dead ends: 130 [2023-11-25 00:01:12,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:01:12,972 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 170 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:12,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 286 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:01:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-25 00:01:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2023-11-25 00:01:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:01:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2023-11-25 00:01:12,984 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 23 [2023-11-25 00:01:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:12,985 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2023-11-25 00:01:12,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-25 00:01:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2023-11-25 00:01:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:01:12,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:12,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:12,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-25 00:01:13,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:13,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:01:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2112750028, now seen corresponding path program 1 times [2023-11-25 00:01:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047226858] [2023-11-25 00:01:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:13,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047226858] [2023-11-25 00:01:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047226858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703483860] [2023-11-25 00:01:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:13,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:13,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:13,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:01:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:13,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:01:13,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:13,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:14,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-11-25 00:01:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:14,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703483860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808790082] [2023-11-25 00:01:14,278 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-25 00:01:14,278 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:14,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:14,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:14,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:15,000 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-11-25 00:01:15,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-11-25 00:01:15,074 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:17,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2745#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (or (< |ULTIMATE.start_downsweep_~n#1| 1) (< (select |#length| |ULTIMATE.start_downsweep_~a#1.base|) (* |ULTIMATE.start_downsweep_~n#1| 4))) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~space~1#1| 1) (= |ULTIMATE.start_upsweep_#res#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_downsweep_~a#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= 1 |ULTIMATE.start_downsweep_~space#1|))' at error location [2023-11-25 00:01:17,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:17,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:01:17,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-25 00:01:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811742381] [2023-11-25 00:01:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:17,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-25 00:01:17,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-25 00:01:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1665, Unknown=5, NotChecked=0, Total=1892 [2023-11-25 00:01:17,960 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:01:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:18,705 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2023-11-25 00:01:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:01:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2023-11-25 00:01:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:18,707 INFO L225 Difference]: With dead ends: 81 [2023-11-25 00:01:18,707 INFO L226 Difference]: Without dead ends: 81 [2023-11-25 00:01:18,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=371, Invalid=2379, Unknown=6, NotChecked=0, Total=2756 [2023-11-25 00:01:18,709 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 458 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:18,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 233 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:01:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-25 00:01:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-25 00:01:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:01:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-11-25 00:01:18,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 24 [2023-11-25 00:01:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:18,716 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-11-25 00:01:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:01:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-11-25 00:01:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:01:18,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:18,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:18,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-25 00:01:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-25 00:01:18,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:01:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1851217705, now seen corresponding path program 1 times [2023-11-25 00:01:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631586265] [2023-11-25 00:01:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:19,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:19,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631586265] [2023-11-25 00:01:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631586265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:19,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624039806] [2023-11-25 00:01:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:19,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:19,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:19,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:01:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:19,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:01:19,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:19,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-25 00:01:19,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-25 00:01:19,654 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-25 00:01:19,654 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 [2023-11-25 00:01:19,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-25 00:01:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:01:19,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624039806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175442417] [2023-11-25 00:01:20,340 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-25 00:01:20,340 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:20,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:20,341 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:20,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:01:20,995 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-25 00:01:21,020 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-25 00:01:21,054 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:01:22,955 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (let ((.cse0 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse1 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse2 (exists ((|v_#length_66| (Array Int Int))) (= (let ((.cse10 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_66| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse10) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse10)) |c_#length|))) (.cse4 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse5 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse3 ((as const (Array Int Int)) 0)) (.cse7 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_31| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_31| 4294967296) 1))) (.cse8 (exists ((|v_#valid_75| (Array Int Int))) (let ((.cse9 (store |v_#valid_75| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= (select |v_#valid_75| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0) (= |c_#valid| (store .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)) (= (select .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0)))))) (or (and .cse0 .cse1 .cse2 (exists ((|v_#memory_int_109| (Array Int (Array Int Int)))) (= (store |v_#memory_int_109| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse3) |c_#memory_int|)) .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 .cse2 .cse4 .cse5 .cse6 (exists ((|v_#memory_int_108| (Array Int (Array Int Int)))) (= (store |v_#memory_int_108| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse3) |c_#memory_int|)) .cse7 .cse8)))) is different from true [2023-11-25 00:01:23,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3069#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= (select |#length| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) 3)) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-11-25 00:01:23,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:01:23,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:01:23,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2023-11-25 00:01:23,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882902784] [2023-11-25 00:01:23,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:01:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-25 00:01:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-25 00:01:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1317, Unknown=5, NotChecked=74, Total=1560 [2023-11-25 00:01:23,228 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-25 00:01:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:24,776 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2023-11-25 00:01:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:01:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 24 [2023-11-25 00:01:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:24,778 INFO L225 Difference]: With dead ends: 127 [2023-11-25 00:01:24,778 INFO L226 Difference]: Without dead ends: 127 [2023-11-25 00:01:24,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=364, Invalid=2391, Unknown=5, NotChecked=102, Total=2862 [2023-11-25 00:01:24,780 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 475 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:24,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 206 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:01:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-25 00:01:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2023-11-25 00:01:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 70 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:01:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2023-11-25 00:01:24,785 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 24 [2023-11-25 00:01:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:24,785 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2023-11-25 00:01:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-25 00:01:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2023-11-25 00:01:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:01:24,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:24,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:24,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-25 00:01:25,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:25,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:01:25,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1070576449, now seen corresponding path program 1 times [2023-11-25 00:01:25,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:25,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560432667] [2023-11-25 00:01:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:25,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:25,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560432667] [2023-11-25 00:01:25,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560432667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:25,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:25,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:25,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032957334] [2023-11-25 00:01:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:01:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:01:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:01:25,062 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:01:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:25,149 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-11-25 00:01:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:01:25,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-11-25 00:01:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:25,152 INFO L225 Difference]: With dead ends: 77 [2023-11-25 00:01:25,152 INFO L226 Difference]: Without dead ends: 77 [2023-11-25 00:01:25,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:01:25,153 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:25,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:01:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-25 00:01:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-25 00:01:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.530612244897959) internal successors, (75), 67 states have internal predecessors, (75), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:01:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-11-25 00:01:25,158 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 25 [2023-11-25 00:01:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:25,158 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-11-25 00:01:25,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:01:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-11-25 00:01:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:01:25,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:25,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-25 00:01:25,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-25 00:01:25,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1070576450, now seen corresponding path program 1 times [2023-11-25 00:01:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028814177] [2023-11-25 00:01:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:25,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:25,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028814177] [2023-11-25 00:01:25,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028814177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:25,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87881547] [2023-11-25 00:01:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:25,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:25,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3640f04c-0fa4-4d27-a3d8-307b3a888742/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:01:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:25,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:01:25,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:25,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:01:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87881547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:25,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038402673] [2023-11-25 00:01:25,488 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-25 00:01:25,489 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:25,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:25,489 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:25,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs