./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/wc-2.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_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/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_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/wc-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/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_8f6978ff-b888-4750-8808-a38bd7436da0/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 f341eaff5b8d59d4b432d28ef9496964fb23f130f25d76d129a608308250bd30 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:58:23,360 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:58:23,438 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-24 23:58:23,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:58:23,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:58:23,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:58:23,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:58:23,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:58:23,474 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:58:23,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:58:23,476 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:58:23,476 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:58:23,477 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:58:23,477 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:58:23,478 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:58:23,479 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:58:23,479 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:58:23,480 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:58:23,480 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:58:23,481 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:58:23,482 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:58:23,482 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:58:23,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:58:23,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:58:23,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:58:23,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:58:23,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:58:23,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:58:23,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:58:23,487 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:58:23,488 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:58:23,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:58:23,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:58:23,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:58:23,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:58:23,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:58:23,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:23,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:58:23,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:58:23,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:58:23,493 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:58:23,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:58:23,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:58:23,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:58:23,495 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:58:23,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:58:23,496 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_8f6978ff-b888-4750-8808-a38bd7436da0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f341eaff5b8d59d4b432d28ef9496964fb23f130f25d76d129a608308250bd30 [2023-11-24 23:58:23,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:58:23,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:58:23,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:58:23,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:58:23,788 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:58:23,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/busybox-1.22.0/wc-2.i [2023-11-24 23:58:27,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:58:27,697 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:58:27,697 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/sv-benchmarks/c/busybox-1.22.0/wc-2.i [2023-11-24 23:58:27,738 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/data/c34b82520/a491d24df2b346289469a84e3b8aa343/FLAG790a8ace8 [2023-11-24 23:58:27,757 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/data/c34b82520/a491d24df2b346289469a84e3b8aa343 [2023-11-24 23:58:27,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:58:27,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:58:27,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:58:27,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:58:27,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:58:27,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12dcf686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:27, skipping insertion in model container [2023-11-24 23:58:27,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:58:27" (1/1) ... [2023-11-24 23:58:27,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:58:29,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:58:29,587 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:58:29,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:58:30,084 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,084 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,085 WARN L675 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,085 WARN L675 CHandler]: The function ferror is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,085 WARN L675 CHandler]: The function strstr is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,085 WARN L675 CHandler]: The function fclose is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,086 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,086 WARN L675 CHandler]: The function fgetc is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:58:30,094 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:58:30,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30 WrapperNode [2023-11-24 23:58:30,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:58:30,097 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:58:30,097 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:58:30,097 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:58:30,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,338 INFO L138 Inliner]: procedures = 577, calls = 489, calls flagged for inlining = 31, calls inlined = 29, statements flattened = 1940 [2023-11-24 23:58:30,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:58:30,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:58:30,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:58:30,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:58:30,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:58:30,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:58:30,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:58:30,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:58:30,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (1/1) ... [2023-11-24 23:58:30,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:30,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:30,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:58:30,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:58:30,601 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-24 23:58:30,601 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2023-11-24 23:58:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:58:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-24 23:58:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-24 23:58:30,602 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-24 23:58:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2023-11-24 23:58:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-24 23:58:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:58:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:58:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-24 23:58:30,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:58:30,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:58:30,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:58:30,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:58:30,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-24 23:58:30,606 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-24 23:58:30,607 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-24 23:58:30,608 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-24 23:58:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-24 23:58:30,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-24 23:58:30,609 INFO L130 BoogieDeclarations]: Found specification of procedure bb_simple_perror_msg [2023-11-24 23:58:30,609 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_simple_perror_msg [2023-11-24 23:58:30,609 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-11-24 23:58:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-24 23:58:30,610 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-24 23:58:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:58:30,610 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:58:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:58:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:58:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2023-11-24 23:58:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:58:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2023-11-24 23:58:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:58:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-24 23:58:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-24 23:58:30,612 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-24 23:58:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:58:31,109 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:58:31,111 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:58:32,995 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:58:33,791 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:58:33,791 INFO L309 CfgBuilder]: Removed 29 assume(true) statements. [2023-11-24 23:58:33,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:33 BoogieIcfgContainer [2023-11-24 23:58:33,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:58:33,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:58:33,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:58:33,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:58:33,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:58:27" (1/3) ... [2023-11-24 23:58:33,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201fd885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:33, skipping insertion in model container [2023-11-24 23:58:33,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:30" (2/3) ... [2023-11-24 23:58:33,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201fd885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:33, skipping insertion in model container [2023-11-24 23:58:33,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:33" (3/3) ... [2023-11-24 23:58:33,802 INFO L112 eAbstractionObserver]: Analyzing ICFG wc-2.i [2023-11-24 23:58:33,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:58:33,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2023-11-24 23:58:33,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:58:33,888 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;@1cffe9a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:58:33,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-11-24 23:58:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 293 states have (on average 1.713310580204778) internal successors, (502), 359 states have internal predecessors, (502), 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 23:58:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:58:33,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:33,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:58:33,903 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 62 more)] === [2023-11-24 23:58:33,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1843670, now seen corresponding path program 1 times [2023-11-24 23:58:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763289688] [2023-11-24 23:58:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:34,514 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 23:58:34,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763289688] [2023-11-24 23:58:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763289688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:34,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:34,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:58:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196075093] [2023-11-24 23:58:34,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:34,588 INFO L87 Difference]: Start difference. First operand has 390 states, 293 states have (on average 1.713310580204778) internal successors, (502), 359 states have internal predecessors, (502), 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 23:58:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:35,126 INFO L93 Difference]: Finished difference Result 774 states and 1106 transitions. [2023-11-24 23:58:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:35,129 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 23:58:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:35,153 INFO L225 Difference]: With dead ends: 774 [2023-11-24 23:58:35,153 INFO L226 Difference]: Without dead ends: 386 [2023-11-24 23:58:35,165 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 23:58:35,172 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:35,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 874 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:58:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-24 23:58:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2023-11-24 23:58:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 291 states have (on average 1.6219931271477663) internal successors, (472), 360 states have internal predecessors, (472), 24 states have call successors, (24), 7 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 23:58:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 515 transitions. [2023-11-24 23:58:35,279 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 515 transitions. Word has length 3 [2023-11-24 23:58:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:35,280 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 515 transitions. [2023-11-24 23:58:35,280 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 23:58:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 515 transitions. [2023-11-24 23:58:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:58:35,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:35,282 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-24 23:58:35,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:58:35,283 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 62 more)] === [2023-11-24 23:58:35,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -909454485, now seen corresponding path program 1 times [2023-11-24 23:58:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:35,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163034888] [2023-11-24 23:58:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:35,558 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 23:58:35,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163034888] [2023-11-24 23:58:35,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163034888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:35,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665068416] [2023-11-24 23:58:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:35,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:35,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:35,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:35,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:58:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:35,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:58:35,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:36,011 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 23:58:36,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:36,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665068416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:36,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:36,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-24 23:58:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257499487] [2023-11-24 23:58:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:36,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:58:36,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:58:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:58:36,018 INFO L87 Difference]: Start difference. First operand 386 states and 515 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 23:58:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:36,405 INFO L93 Difference]: Finished difference Result 386 states and 515 transitions. [2023-11-24 23:58:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:58:36,406 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 23:58:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:36,410 INFO L225 Difference]: With dead ends: 386 [2023-11-24 23:58:36,410 INFO L226 Difference]: Without dead ends: 385 [2023-11-24 23:58:36,411 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 23:58:36,412 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 3 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:36,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 870 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:58:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-24 23:58:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2023-11-24 23:58:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 291 states have (on average 1.6185567010309279) internal successors, (471), 359 states have internal predecessors, (471), 24 states have call successors, (24), 7 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 23:58:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 514 transitions. [2023-11-24 23:58:36,439 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 514 transitions. Word has length 6 [2023-11-24 23:58:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:36,439 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 514 transitions. [2023-11-24 23:58:36,439 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 23:58:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 514 transitions. [2023-11-24 23:58:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:58:36,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:36,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-24 23:58:36,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:36,648 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 62 more)] === [2023-11-24 23:58:36,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1871682387, now seen corresponding path program 1 times [2023-11-24 23:58:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:36,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647607203] [2023-11-24 23:58:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:36,809 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 23:58:36,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647607203] [2023-11-24 23:58:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647607203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:36,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:58:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585971694] [2023-11-24 23:58:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:36,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:36,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:36,813 INFO L87 Difference]: Start difference. First operand 385 states and 514 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 23:58:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:37,243 INFO L93 Difference]: Finished difference Result 385 states and 514 transitions. [2023-11-24 23:58:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:37,245 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 23:58:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:37,248 INFO L225 Difference]: With dead ends: 385 [2023-11-24 23:58:37,249 INFO L226 Difference]: Without dead ends: 384 [2023-11-24 23:58:37,252 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 23:58:37,254 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 0 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:37,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 870 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:58:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-24 23:58:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382. [2023-11-24 23:58:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 289 states have (on average 1.6193771626297577) internal successors, (468), 356 states have internal predecessors, (468), 24 states have call successors, (24), 7 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 23:58:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 511 transitions. [2023-11-24 23:58:37,282 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 511 transitions. Word has length 7 [2023-11-24 23:58:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:37,282 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 511 transitions. [2023-11-24 23:58:37,282 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 23:58:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 511 transitions. [2023-11-24 23:58:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:58:37,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:37,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:37,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:58:37,285 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 62 more)] === [2023-11-24 23:58:37,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash 631808627, now seen corresponding path program 1 times [2023-11-24 23:58:37,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:37,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470420053] [2023-11-24 23:58:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:37,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:37,532 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 23:58:37,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:37,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470420053] [2023-11-24 23:58:37,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470420053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:37,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820957560] [2023-11-24 23:58:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:37,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:37,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:37,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:37,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:58:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:37,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:58:37,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:37,951 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 23:58:37,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:37,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820957560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:37,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:37,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:58:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159174711] [2023-11-24 23:58:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:58:37,956 INFO L87 Difference]: Start difference. First operand 382 states and 511 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 23:58:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:38,285 INFO L93 Difference]: Finished difference Result 382 states and 511 transitions. [2023-11-24 23:58:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:38,286 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 23:58:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:38,289 INFO L225 Difference]: With dead ends: 382 [2023-11-24 23:58:38,289 INFO L226 Difference]: Without dead ends: 380 [2023-11-24 23:58:38,289 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 23:58:38,291 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 352 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:38,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 551 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:58:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-24 23:58:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2023-11-24 23:58:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 289 states have (on average 1.6124567474048443) internal successors, (466), 354 states have internal predecessors, (466), 24 states have call successors, (24), 7 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 23:58:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 509 transitions. [2023-11-24 23:58:38,315 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 509 transitions. Word has length 9 [2023-11-24 23:58:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:38,316 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 509 transitions. [2023-11-24 23:58:38,317 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 23:58:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 509 transitions. [2023-11-24 23:58:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:58:38,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:38,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:38,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:38,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:38,525 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 62 more)] === [2023-11-24 23:58:38,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1888768684, now seen corresponding path program 1 times [2023-11-24 23:58:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280827710] [2023-11-24 23:58:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:38,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:38,736 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 23:58:38,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:38,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280827710] [2023-11-24 23:58:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280827710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:38,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881165191] [2023-11-24 23:58:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:38,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:38,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:38,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:38,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:58:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:39,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:58:39,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:39,121 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 23:58:39,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:58:39,151 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 23:58:39,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881165191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:58:39,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550158502] [2023-11-24 23:58:39,174 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-24 23:58:39,174 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:58:39,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:58:39,185 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:58:39,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:58:51,724 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 121 for LOIs [2023-11-24 23:58:51,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:58:53,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [550158502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:53,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:58:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 14 [2023-11-24 23:58:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5517995] [2023-11-24 23:58:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:58:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:58:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:58:53,834 INFO L87 Difference]: Start difference. First operand 380 states and 509 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 23:58:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:57,015 INFO L93 Difference]: Finished difference Result 382 states and 510 transitions. [2023-11-24 23:58:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:58:57,017 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 23:58:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:57,027 INFO L225 Difference]: With dead ends: 382 [2023-11-24 23:58:57,027 INFO L226 Difference]: Without dead ends: 380 [2023-11-24 23:58:57,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:58:57,029 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 5 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:57,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2255 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-24 23:58:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-24 23:58:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2023-11-24 23:58:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 290 states have (on average 1.603448275862069) internal successors, (465), 353 states have internal predecessors, (465), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:58:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 508 transitions. [2023-11-24 23:58:57,050 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 508 transitions. Word has length 10 [2023-11-24 23:58:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:57,050 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 508 transitions. [2023-11-24 23:58:57,050 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 23:58:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 508 transitions. [2023-11-24 23:58:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:58:57,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:57,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:57,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 23:58:57,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:57,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:58:57,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 901389137, now seen corresponding path program 1 times [2023-11-24 23:58:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78496281] [2023-11-24 23:58:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:57,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:57,458 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 23:58:57,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:57,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78496281] [2023-11-24 23:58:57,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78496281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:57,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217307926] [2023-11-24 23:58:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:57,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:57,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:57,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:58:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:57,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:58:57,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:57,880 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 23:58:57,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:57,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217307926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:57,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:57,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:58:57,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296272925] [2023-11-24 23:58:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:58:57,883 INFO L87 Difference]: Start difference. First operand 380 states and 508 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 23:58:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:58,282 INFO L93 Difference]: Finished difference Result 380 states and 508 transitions. [2023-11-24 23:58:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:58,283 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 23:58:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:58,286 INFO L225 Difference]: With dead ends: 380 [2023-11-24 23:58:58,286 INFO L226 Difference]: Without dead ends: 379 [2023-11-24 23:58:58,286 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 23:58:58,287 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 7 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:58,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 851 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:58:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-24 23:58:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-11-24 23:58:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 290 states have (on average 1.6) internal successors, (464), 352 states have internal predecessors, (464), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:58:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 507 transitions. [2023-11-24 23:58:58,310 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 507 transitions. Word has length 15 [2023-11-24 23:58:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:58,310 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 507 transitions. [2023-11-24 23:58:58,310 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 23:58:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 507 transitions. [2023-11-24 23:58:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:58:58,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:58,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:58,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:58,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:58:58,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash 901336800, now seen corresponding path program 1 times [2023-11-24 23:58:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:58,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929412304] [2023-11-24 23:58:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:58,757 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 23:58:58,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929412304] [2023-11-24 23:58:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929412304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:58,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423224739] [2023-11-24 23:58:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:58,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:58,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:58,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:58:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:59,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:58:59,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:59,174 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 23:58:59,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:59,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423224739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:59,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:58:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951151945] [2023-11-24 23:58:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:59,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:58:59,177 INFO L87 Difference]: Start difference. First operand 379 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 23:58:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:59,614 INFO L93 Difference]: Finished difference Result 379 states and 507 transitions. [2023-11-24 23:58:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:59,615 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 23:58:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:59,618 INFO L225 Difference]: With dead ends: 379 [2023-11-24 23:58:59,619 INFO L226 Difference]: Without dead ends: 378 [2023-11-24 23:58:59,620 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 23:58:59,621 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 2 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:59,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 855 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:58:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-24 23:58:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2023-11-24 23:58:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 290 states have (on average 1.596551724137931) internal successors, (463), 351 states have internal predecessors, (463), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:58:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2023-11-24 23:58:59,643 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 15 [2023-11-24 23:58:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:59,643 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2023-11-24 23:58:59,643 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 23:58:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2023-11-24 23:58:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:58:59,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:59,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:59,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-24 23:58:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:59,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:58:59,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2121707432, now seen corresponding path program 1 times [2023-11-24 23:58:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790266219] [2023-11-24 23:58:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:00,080 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 23:59:00,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:00,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790266219] [2023-11-24 23:59:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790266219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:00,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815229549] [2023-11-24 23:59:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:00,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:00,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:00,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:00,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:59:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:00,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:00,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:00,485 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 23:59:00,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815229549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:00,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:59:00,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868285556] [2023-11-24 23:59:00,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:00,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:00,487 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:00,916 INFO L93 Difference]: Finished difference Result 386 states and 516 transitions. [2023-11-24 23:59:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-24 23:59:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:00,920 INFO L225 Difference]: With dead ends: 386 [2023-11-24 23:59:00,921 INFO L226 Difference]: Without dead ends: 385 [2023-11-24 23:59:00,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 23:59:00,922 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 4 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:00,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 854 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-24 23:59:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2023-11-24 23:59:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 296 states have (on average 1.5945945945945945) internal successors, (472), 357 states have internal predecessors, (472), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:59:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2023-11-24 23:59:00,946 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 515 transitions. Word has length 16 [2023-11-24 23:59:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:00,947 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 515 transitions. [2023-11-24 23:59:00,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 515 transitions. [2023-11-24 23:59:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:59:00,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:00,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:00,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:01,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 23:59:01,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:59:01,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2123329888, now seen corresponding path program 1 times [2023-11-24 23:59:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:01,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223394783] [2023-11-24 23:59:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:01,342 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 23:59:01,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223394783] [2023-11-24 23:59:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223394783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847710204] [2023-11-24 23:59:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:01,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:01,345 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:01,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:59:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:01,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:01,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:01,751 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 23:59:01,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:01,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847710204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:01,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:01,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:59:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393515148] [2023-11-24 23:59:01,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:01,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:01,759 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:02,130 INFO L93 Difference]: Finished difference Result 758 states and 1020 transitions. [2023-11-24 23:59:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-24 23:59:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:02,134 INFO L225 Difference]: With dead ends: 758 [2023-11-24 23:59:02,134 INFO L226 Difference]: Without dead ends: 390 [2023-11-24 23:59:02,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 23:59:02,137 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 0 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:02,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 856 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-24 23:59:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-11-24 23:59:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 302 states have (on average 1.5827814569536425) internal successors, (478), 363 states have internal predecessors, (478), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:59:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 521 transitions. [2023-11-24 23:59:02,159 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 521 transitions. Word has length 16 [2023-11-24 23:59:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:02,159 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 521 transitions. [2023-11-24 23:59:02,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 521 transitions. [2023-11-24 23:59:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:59:02,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:02,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:02,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:02,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 23:59:02,369 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:59:02,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2071589810, now seen corresponding path program 1 times [2023-11-24 23:59:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:02,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420557783] [2023-11-24 23:59:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:02,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:02,606 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 23:59:02,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420557783] [2023-11-24 23:59:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420557783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181307397] [2023-11-24 23:59:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:02,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:02,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:02,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:02,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:59:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:03,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:03,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:03,120 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 23:59:03,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181307397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:03,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:03,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:59:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935619258] [2023-11-24 23:59:03,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:03,123 INFO L87 Difference]: Start difference. First operand 390 states and 521 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:03,431 INFO L93 Difference]: Finished difference Result 392 states and 523 transitions. [2023-11-24 23:59:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-24 23:59:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:03,434 INFO L225 Difference]: With dead ends: 392 [2023-11-24 23:59:03,434 INFO L226 Difference]: Without dead ends: 391 [2023-11-24 23:59:03,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 23:59:03,436 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 258 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:03,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 619 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-24 23:59:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2023-11-24 23:59:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 302 states have (on average 1.5794701986754967) internal successors, (477), 362 states have internal predecessors, (477), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:59:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 520 transitions. [2023-11-24 23:59:03,457 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 520 transitions. Word has length 16 [2023-11-24 23:59:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:03,457 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 520 transitions. [2023-11-24 23:59:03,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 520 transitions. [2023-11-24 23:59:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 23:59:03,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:03,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:03,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:59:03,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:59:03,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 205225802, now seen corresponding path program 1 times [2023-11-24 23:59:03,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:03,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074989993] [2023-11-24 23:59:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:03,858 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 23:59:03,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074989993] [2023-11-24 23:59:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074989993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:03,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842352556] [2023-11-24 23:59:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:03,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:03,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:03,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:03,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:59:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:04,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:04,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:04,351 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 23:59:04,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842352556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:04,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:04,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:59:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693559557] [2023-11-24 23:59:04,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:04,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:04,353 INFO L87 Difference]: Start difference. First operand 389 states and 520 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:04,799 INFO L93 Difference]: Finished difference Result 589 states and 800 transitions. [2023-11-24 23:59:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-24 23:59:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:04,804 INFO L225 Difference]: With dead ends: 589 [2023-11-24 23:59:04,805 INFO L226 Difference]: Without dead ends: 588 [2023-11-24 23:59:04,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 23:59:04,806 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 256 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:04,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 843 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2023-11-24 23:59:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 393. [2023-11-24 23:59:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 306 states have (on average 1.5751633986928104) internal successors, (482), 366 states have internal predecessors, (482), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:59:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 525 transitions. [2023-11-24 23:59:04,830 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 525 transitions. Word has length 17 [2023-11-24 23:59:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:04,831 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 525 transitions. [2023-11-24 23:59:04,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 525 transitions. [2023-11-24 23:59:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:59:04,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:04,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:04,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:05,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:59:05,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:59:05,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 158018525, now seen corresponding path program 1 times [2023-11-24 23:59:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:05,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226656179] [2023-11-24 23:59:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:59:05,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226656179] [2023-11-24 23:59:05,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226656179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:05,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551854115] [2023-11-24 23:59:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:05,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:05,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:05,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:59:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:05,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:59:05,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:59:05,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551854115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:05,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:59:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138460176] [2023-11-24 23:59:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:59:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:59:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:05,652 INFO L87 Difference]: Start difference. First operand 393 states and 525 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:06,049 INFO L93 Difference]: Finished difference Result 393 states and 525 transitions. [2023-11-24 23:59:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:59:06,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-24 23:59:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:06,054 INFO L225 Difference]: With dead ends: 393 [2023-11-24 23:59:06,054 INFO L226 Difference]: Without dead ends: 392 [2023-11-24 23:59:06,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 23:59:06,055 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 0 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:06,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 853 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:59:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-24 23:59:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 388. [2023-11-24 23:59:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 302 states have (on average 1.576158940397351) internal successors, (476), 361 states have internal predecessors, (476), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-24 23:59:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 519 transitions. [2023-11-24 23:59:06,079 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 519 transitions. Word has length 19 [2023-11-24 23:59:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:06,079 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 519 transitions. [2023-11-24 23:59:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:59:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 519 transitions. [2023-11-24 23:59:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:59:06,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:06,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:59:06,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:59:06,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:59:06,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2035278225, now seen corresponding path program 1 times [2023-11-24 23:59:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369787393] [2023-11-24 23:59:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:59:06,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:06,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369787393] [2023-11-24 23:59:06,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369787393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:06,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434194907] [2023-11-24 23:59:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:06,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:06,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6978ff-b888-4750-8808-a38bd7436da0/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:59:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:06,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:59:06,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:59:06,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:59:07,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434194907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:07,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495001789] [2023-11-24 23:59:07,028 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-24 23:59:07,028 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:59:07,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:59:07,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:59:07,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs