./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/uname-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/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_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/uname-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3999cc698e311091d54043edd18a5bc433521811cd6fd8bf6a6d8cf25ef70004 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:16:24,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:16:24,332 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-24 23:16:24,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:16:24,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:16:24,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:16:24,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:16:24,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:16:24,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:16:24,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:16:24,387 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:16:24,387 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:16:24,388 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:16:24,389 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:16:24,389 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:16:24,390 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:16:24,390 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:16:24,391 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:16:24,408 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:16:24,408 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:16:24,409 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:16:24,410 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:16:24,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:16:24,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:16:24,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:16:24,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:16:24,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:16:24,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:16:24,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:16:24,414 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:16:24,414 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:16:24,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:16:24,415 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:16:24,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:16:24,415 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:16:24,416 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:16:24,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:16:24,416 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:16:24,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:16:24,417 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:16:24,417 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:16:24,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:16:24,418 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:16:24,418 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:16:24,418 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:16:24,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:16:24,419 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_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3999cc698e311091d54043edd18a5bc433521811cd6fd8bf6a6d8cf25ef70004 [2023-11-24 23:16:24,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:16:24,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:16:24,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:16:24,746 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:16:24,748 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:16:24,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/busybox-1.22.0/uname-1.i [2023-11-24 23:16:28,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:16:28,951 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:16:28,952 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/sv-benchmarks/c/busybox-1.22.0/uname-1.i [2023-11-24 23:16:28,991 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/data/cb43f605a/96be04a8b4d9456ca1d0093d2a145831/FLAGab729d7ad [2023-11-24 23:16:29,011 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/data/cb43f605a/96be04a8b4d9456ca1d0093d2a145831 [2023-11-24 23:16:29,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:16:29,016 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:16:29,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:16:29,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:16:29,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:16:29,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:16:29" (1/1) ... [2023-11-24 23:16:29,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b14338e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:29, skipping insertion in model container [2023-11-24 23:16:29,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:16:29" (1/1) ... [2023-11-24 23:16:29,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:16:31,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:16:31,197 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:16:31,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:16:31,643 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:31,643 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:31,643 WARN L675 CHandler]: The function putchar is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:31,643 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:31,652 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:16:31,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31 WrapperNode [2023-11-24 23:16:31,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:16:31,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:16:31,655 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:16:31,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:16:31,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:31,759 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:31,890 INFO L138 Inliner]: procedures = 570, calls = 556, calls flagged for inlining = 24, calls inlined = 22, statements flattened = 1883 [2023-11-24 23:16:31,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:16:31,892 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:16:31,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:16:31,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:16:31,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:31,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:31,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:31,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:32,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:32,123 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:32,179 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:32,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:32,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:16:32,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:16:32,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:16:32,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:16:32,248 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (1/1) ... [2023-11-24 23:16:32,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:16:32,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:32,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:16:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:16:32,331 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2023-11-24 23:16:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:16:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-24 23:16:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-24 23:16:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-24 23:16:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-24 23:16:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:16:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:16:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-24 23:16:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:16:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:16:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:16:32,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:16:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-24 23:16:32,336 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-24 23:16:32,337 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-24 23:16:32,337 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-24 23:16:32,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-24 23:16:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-24 23:16:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-24 23:16:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-24 23:16:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:16:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:16:32,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:16:32,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:16:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:16:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure bb_show_usage [2023-11-24 23:16:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_show_usage [2023-11-24 23:16:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:16:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-24 23:16:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-24 23:16:32,342 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-24 23:16:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:16:32,918 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:16:32,920 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:16:34,760 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:16:35,402 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:16:35,403 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-24 23:16:35,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:16:35 BoogieIcfgContainer [2023-11-24 23:16:35,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:16:35,408 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:16:35,408 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:16:35,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:16:35,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:16:29" (1/3) ... [2023-11-24 23:16:35,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dac4a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:16:35, skipping insertion in model container [2023-11-24 23:16:35,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:31" (2/3) ... [2023-11-24 23:16:35,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dac4a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:16:35, skipping insertion in model container [2023-11-24 23:16:35,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:16:35" (3/3) ... [2023-11-24 23:16:35,416 INFO L112 eAbstractionObserver]: Analyzing ICFG uname-1.i [2023-11-24 23:16:35,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:16:35,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-24 23:16:35,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:16:35,526 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7bcb3011, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:16:35,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-11-24 23:16:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 291 states have (on average 1.7353951890034365) internal successors, (505), 373 states have internal predecessors, (505), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-24 23:16:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:16:35,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:35,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:16:35,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:16:35,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1667967, now seen corresponding path program 1 times [2023-11-24 23:16:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:35,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640729952] [2023-11-24 23:16:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:36,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640729952] [2023-11-24 23:16:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640729952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:36,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:36,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:16:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979478746] [2023-11-24 23:16:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:36,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:16:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:16:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:16:36,300 INFO L87 Difference]: Start difference. First operand has 403 states, 291 states have (on average 1.7353951890034365) internal successors, (505), 373 states have internal predecessors, (505), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:16:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:36,942 INFO L93 Difference]: Finished difference Result 800 states and 1112 transitions. [2023-11-24 23:16:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:16:36,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 23:16:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:36,963 INFO L225 Difference]: With dead ends: 800 [2023-11-24 23:16:36,963 INFO L226 Difference]: Without dead ends: 395 [2023-11-24 23:16:36,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:16:36,976 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:36,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 898 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:16:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-24 23:16:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2023-11-24 23:16:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 286 states have (on average 1.6468531468531469) internal successors, (471), 370 states have internal predecessors, (471), 24 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:16:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 514 transitions. [2023-11-24 23:16:37,067 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 514 transitions. Word has length 3 [2023-11-24 23:16:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:37,067 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 514 transitions. [2023-11-24 23:16:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:16:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 514 transitions. [2023-11-24 23:16:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:16:37,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:37,069 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-24 23:16:37,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:16:37,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:16:37,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:37,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1848850297, now seen corresponding path program 1 times [2023-11-24 23:16:37,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:37,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092944635] [2023-11-24 23:16:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:37,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092944635] [2023-11-24 23:16:37,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092944635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:16:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150787916] [2023-11-24 23:16:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:37,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:37,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:37,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:37,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:16:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:37,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:16:37,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:37,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:16:37,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150787916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:37,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:16:37,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-24 23:16:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913092785] [2023-11-24 23:16:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:37,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:16:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:16:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:16:37,923 INFO L87 Difference]: Start difference. First operand 395 states and 514 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:16:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:38,393 INFO L93 Difference]: Finished difference Result 395 states and 514 transitions. [2023-11-24 23:16:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:16:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 23:16:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:38,399 INFO L225 Difference]: With dead ends: 395 [2023-11-24 23:16:38,400 INFO L226 Difference]: Without dead ends: 394 [2023-11-24 23:16:38,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:16:38,402 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 2 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:38,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1326 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:16:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-24 23:16:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2023-11-24 23:16:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 286 states have (on average 1.6433566433566433) internal successors, (470), 369 states have internal predecessors, (470), 24 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:16:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 513 transitions. [2023-11-24 23:16:38,449 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 513 transitions. Word has length 6 [2023-11-24 23:16:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:38,451 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 513 transitions. [2023-11-24 23:16:38,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:16:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 513 transitions. [2023-11-24 23:16:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:16:38,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:38,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-24 23:16:38,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:16:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:38,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:16:38,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1479784004, now seen corresponding path program 1 times [2023-11-24 23:16:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:38,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005884671] [2023-11-24 23:16:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:38,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:16:38,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005884671] [2023-11-24 23:16:38,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005884671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:38,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:38,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:16:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122288613] [2023-11-24 23:16:38,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:38,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:16:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:16:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:16:38,907 INFO L87 Difference]: Start difference. First operand 394 states and 513 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:16:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:39,249 INFO L93 Difference]: Finished difference Result 394 states and 513 transitions. [2023-11-24 23:16:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:16:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 23:16:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:39,254 INFO L225 Difference]: With dead ends: 394 [2023-11-24 23:16:39,254 INFO L226 Difference]: Without dead ends: 393 [2023-11-24 23:16:39,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:16:39,256 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 0 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:39,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 884 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:16:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-24 23:16:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 391. [2023-11-24 23:16:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 284 states have (on average 1.6443661971830985) internal successors, (467), 366 states have internal predecessors, (467), 24 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:16:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 510 transitions. [2023-11-24 23:16:39,298 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 510 transitions. Word has length 7 [2023-11-24 23:16:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:39,299 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 510 transitions. [2023-11-24 23:16:39,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:16:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 510 transitions. [2023-11-24 23:16:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:16:39,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:39,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:39,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:16:39,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:16:39,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 982420795, now seen corresponding path program 1 times [2023-11-24 23:16:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:39,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628374743] [2023-11-24 23:16:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:39,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628374743] [2023-11-24 23:16:39,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628374743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:16:39,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351873691] [2023-11-24 23:16:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:39,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:39,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:16:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:40,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:16:40,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:16:40,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:16:40,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351873691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:40,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:16:40,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:16:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146795820] [2023-11-24 23:16:40,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:40,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:16:40,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:16:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:16:40,101 INFO L87 Difference]: Start difference. First operand 391 states and 510 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:16:40,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:40,519 INFO L93 Difference]: Finished difference Result 391 states and 510 transitions. [2023-11-24 23:16:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:16:40,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-24 23:16:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:40,524 INFO L225 Difference]: With dead ends: 391 [2023-11-24 23:16:40,524 INFO L226 Difference]: Without dead ends: 389 [2023-11-24 23:16:40,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:16:40,527 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 344 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:40,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 569 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:16:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-24 23:16:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2023-11-24 23:16:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 284 states have (on average 1.6373239436619718) internal successors, (465), 364 states have internal predecessors, (465), 24 states have call successors, (24), 7 states have call predecessors, (24), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:16:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 508 transitions. [2023-11-24 23:16:40,553 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 508 transitions. Word has length 9 [2023-11-24 23:16:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:40,555 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 508 transitions. [2023-11-24 23:16:40,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:16:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 508 transitions. [2023-11-24 23:16:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:16:40,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:40,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:40,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:16:40,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:40,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:16:40,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 390273937, now seen corresponding path program 1 times [2023-11-24 23:16:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531656000] [2023-11-24 23:16:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:41,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531656000] [2023-11-24 23:16:41,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531656000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:16:41,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575436302] [2023-11-24 23:16:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:41,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:41,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:41,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:16:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:41,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:16:41,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:16:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:41,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:16:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575436302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:16:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746076878] [2023-11-24 23:16:41,591 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-24 23:16:41,591 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:16:41,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:16:41,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:16:41,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:17:12,336 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 129 for LOIs [2023-11-24 23:17:12,394 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:17:14,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1746076878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:14,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:17:14,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 14 [2023-11-24 23:17:14,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831703238] [2023-11-24 23:17:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:14,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:17:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:17:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:17:14,350 INFO L87 Difference]: Start difference. First operand 389 states and 508 transitions. Second operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:18,102 INFO L93 Difference]: Finished difference Result 391 states and 509 transitions. [2023-11-24 23:17:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:17:18,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-24 23:17:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:18,106 INFO L225 Difference]: With dead ends: 391 [2023-11-24 23:17:18,106 INFO L226 Difference]: Without dead ends: 389 [2023-11-24 23:17:18,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:17:18,108 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 6 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:18,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1806 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-24 23:17:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-24 23:17:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2023-11-24 23:17:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 285 states have (on average 1.6280701754385964) internal successors, (464), 363 states have internal predecessors, (464), 24 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:17:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 507 transitions. [2023-11-24 23:17:18,130 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 507 transitions. Word has length 10 [2023-11-24 23:17:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:18,131 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 507 transitions. [2023-11-24 23:17:18,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 507 transitions. [2023-11-24 23:17:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:17:18,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:18,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:17:18,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:17:18,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:18,339 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:17:18,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 431426952, now seen corresponding path program 1 times [2023-11-24 23:17:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:18,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023329501] [2023-11-24 23:17:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:18,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:18,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023329501] [2023-11-24 23:17:18,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023329501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:18,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679602176] [2023-11-24 23:17:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:18,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:18,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:18,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:18,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:17:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:19,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:17:19,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:17:19,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:17:19,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679602176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:19,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:17:19,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:17:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275842753] [2023-11-24 23:17:19,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:19,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:17:19,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:17:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:19,021 INFO L87 Difference]: Start difference. First operand 389 states and 507 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:19,284 INFO L93 Difference]: Finished difference Result 389 states and 507 transitions. [2023-11-24 23:17:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:17:19,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-24 23:17:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:19,287 INFO L225 Difference]: With dead ends: 389 [2023-11-24 23:17:19,288 INFO L226 Difference]: Without dead ends: 388 [2023-11-24 23:17:19,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:19,289 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 2 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:19,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 871 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:17:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-24 23:17:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2023-11-24 23:17:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 285 states have (on average 1.6245614035087719) internal successors, (463), 362 states have internal predecessors, (463), 24 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:17:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 506 transitions. [2023-11-24 23:17:19,312 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 506 transitions. Word has length 15 [2023-11-24 23:17:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:19,312 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 506 transitions. [2023-11-24 23:17:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 506 transitions. [2023-11-24 23:17:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:17:19,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:19,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:17:19,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:17:19,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:17:19,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 77 more)] === [2023-11-24 23:17:19,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 431471756, now seen corresponding path program 1 times [2023-11-24 23:17:19,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:19,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82053463] [2023-11-24 23:17:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:19,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:19,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82053463] [2023-11-24 23:17:19,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82053463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613503124] [2023-11-24 23:17:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:19,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:19,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:19,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:17:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:20,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:17:20,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:17:20,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:17:20,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613503124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:20,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:17:20,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:17:20,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789449712] [2023-11-24 23:17:20,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:20,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:17:20,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:17:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:20,129 INFO L87 Difference]: Start difference. First operand 388 states and 506 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:20,458 INFO L93 Difference]: Finished difference Result 388 states and 506 transitions. [2023-11-24 23:17:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:17:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-24 23:17:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:20,461 INFO L225 Difference]: With dead ends: 388 [2023-11-24 23:17:20,461 INFO L226 Difference]: Without dead ends: 387 [2023-11-24 23:17:20,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:20,463 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 6 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:20,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 864 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:17:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-24 23:17:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2023-11-24 23:17:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 285 states have (on average 1.6210526315789473) internal successors, (462), 361 states have internal predecessors, (462), 24 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:17:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 505 transitions. [2023-11-24 23:17:20,485 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 505 transitions. Word has length 15 [2023-11-24 23:17:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:20,486 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 505 transitions. [2023-11-24 23:17:20,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 505 transitions. [2023-11-24 23:17:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:17:20,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:20,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:17:20,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c6c3a7-61c9-4026-9478-9e5493f6d9cd/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0