./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/tac-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/tac-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire --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 57f38269c4c960187df192acac7fb1cf78f174b0bc0258d373a3e5b5132a13eb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:38:09,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:38:09,998 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 20:38:10,007 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:38:10,007 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:38:10,054 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:38:10,055 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:38:10,056 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:38:10,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:38:10,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:38:10,063 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:38:10,063 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:38:10,077 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:38:10,079 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:38:10,080 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:38:10,080 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:38:10,081 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:38:10,081 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:38:10,081 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:38:10,082 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:38:10,082 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:38:10,083 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:38:10,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:38:10,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:38:10,085 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:38:10,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:38:10,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:38:10,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:38:10,087 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:38:10,087 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 20:38:10,089 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:38:10,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:38:10,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:38:10,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:38:10,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:38:10,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:38:10,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:10,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:38:10,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:38:10,092 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:38:10,092 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:38:10,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:38:10,093 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:38:10,093 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:38:10,094 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:38:10,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:38:10,094 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_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57f38269c4c960187df192acac7fb1cf78f174b0bc0258d373a3e5b5132a13eb [2023-11-23 20:38:10,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:38:10,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:38:10,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:38:10,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:38:10,409 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:38:10,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/busybox-1.22.0/tac-1.i [2023-11-23 20:38:13,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:38:14,069 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:38:14,070 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/sv-benchmarks/c/busybox-1.22.0/tac-1.i [2023-11-23 20:38:14,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/data/a9d9d17ef/cfd6b33ff56f45b7afecf04311848b7d/FLAG4ff4101fa [2023-11-23 20:38:14,133 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/data/a9d9d17ef/cfd6b33ff56f45b7afecf04311848b7d [2023-11-23 20:38:14,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:38:14,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:38:14,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:14,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:38:14,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:38:14,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbe126a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14, skipping insertion in model container [2023-11-23 20:38:14,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:38:15,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:16,012 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:38:16,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:16,495 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:16,495 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:16,495 WARN L675 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:16,496 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:16,496 WARN L675 CHandler]: The function fgetc is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:16,504 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:38:16,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16 WrapperNode [2023-11-23 20:38:16,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:16,507 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:16,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:38:16,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:38:16,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,706 INFO L138 Inliner]: procedures = 575, calls = 409, calls flagged for inlining = 26, calls inlined = 25, statements flattened = 1704 [2023-11-23 20:38:16,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:16,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:38:16,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:38:16,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:38:16,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,860 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:38:16,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:38:16,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:38:16,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:38:16,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (1/1) ... [2023-11-23 20:38:16,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:16,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:16,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:38:16,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:38:17,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2023-11-23 20:38:17,008 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2023-11-23 20:38:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure xrealloc [2023-11-23 20:38:17,010 INFO L138 BoogieDeclarations]: Found implementation of procedure xrealloc [2023-11-23 20:38:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-23 20:38:17,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:38:17,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:38:17,011 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-23 20:38:17,011 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-23 20:38:17,011 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2023-11-23 20:38:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:38:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:38:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:38:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-23 20:38:17,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:38:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:38:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:38:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:38:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-23 20:38:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-23 20:38:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure xmalloc [2023-11-23 20:38:17,016 INFO L138 BoogieDeclarations]: Found implementation of procedure xmalloc [2023-11-23 20:38:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:38:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:38:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure bb_simple_perror_msg [2023-11-23 20:38:17,017 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_simple_perror_msg [2023-11-23 20:38:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-11-23 20:38:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:38:17,017 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:38:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:38:17,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:38:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:38:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:38:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:38:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:38:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure full_write [2023-11-23 20:38:17,019 INFO L138 BoogieDeclarations]: Found implementation of procedure full_write [2023-11-23 20:38:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-23 20:38:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-23 20:38:17,020 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-23 20:38:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:38:17,583 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:38:17,586 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:38:19,419 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:38:20,010 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:38:20,010 INFO L309 CfgBuilder]: Removed 30 assume(true) statements. [2023-11-23 20:38:20,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:20 BoogieIcfgContainer [2023-11-23 20:38:20,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:38:20,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:38:20,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:38:20,018 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:38:20,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:14" (1/3) ... [2023-11-23 20:38:20,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8a1855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:20, skipping insertion in model container [2023-11-23 20:38:20,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:16" (2/3) ... [2023-11-23 20:38:20,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8a1855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:20, skipping insertion in model container [2023-11-23 20:38:20,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:20" (3/3) ... [2023-11-23 20:38:20,022 INFO L112 eAbstractionObserver]: Analyzing ICFG tac-1.i [2023-11-23 20:38:20,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:38:20,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-11-23 20:38:20,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:38:20,115 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;@2273ce4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:38:20,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-23 20:38:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 412 states, 306 states have (on average 1.6862745098039216) internal successors, (516), 371 states have internal predecessors, (516), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-23 20:38:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 20:38:20,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:20,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 20:38:20,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:20,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1706855, now seen corresponding path program 1 times [2023-11-23 20:38:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:20,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758750028] [2023-11-23 20:38:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:20,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:20,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758750028] [2023-11-23 20:38:20,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758750028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:20,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:20,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:38:20,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984120157] [2023-11-23 20:38:20,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:20,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:20,845 INFO L87 Difference]: Start difference. First operand has 412 states, 306 states have (on average 1.6862745098039216) internal successors, (516), 371 states have internal predecessors, (516), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) 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) [2023-11-23 20:38:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:21,292 INFO L93 Difference]: Finished difference Result 816 states and 1165 transitions. [2023-11-23 20:38:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:21,295 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 [2023-11-23 20:38:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:21,325 INFO L225 Difference]: With dead ends: 816 [2023-11-23 20:38:21,325 INFO L226 Difference]: Without dead ends: 406 [2023-11-23 20:38:21,333 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 [2023-11-23 20:38:21,340 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:21,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 928 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-23 20:38:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-11-23 20:38:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 302 states have (on average 1.6059602649006623) internal successors, (485), 372 states have internal predecessors, (485), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 540 transitions. [2023-11-23 20:38:21,455 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 540 transitions. Word has length 3 [2023-11-23 20:38:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:21,455 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 540 transitions. [2023-11-23 20:38:21,456 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) [2023-11-23 20:38:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 540 transitions. [2023-11-23 20:38:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:38:21,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:21,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 20:38:21,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:38:21,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:21,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -690323987, now seen corresponding path program 1 times [2023-11-23 20:38:21,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:21,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649224817] [2023-11-23 20:38:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:21,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:21,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649224817] [2023-11-23 20:38:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649224817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:21,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037395047] [2023-11-23 20:38:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:21,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:21,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:21,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:38:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:22,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:38:22,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:22,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037395047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:22,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:22,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-23 20:38:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78909915] [2023-11-23 20:38:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:22,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:38:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:38:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:22,076 INFO L87 Difference]: Start difference. First operand 406 states and 540 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) [2023-11-23 20:38:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:22,411 INFO L93 Difference]: Finished difference Result 406 states and 540 transitions. [2023-11-23 20:38:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:38:22,414 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 [2023-11-23 20:38:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:22,418 INFO L225 Difference]: With dead ends: 406 [2023-11-23 20:38:22,419 INFO L226 Difference]: Without dead ends: 405 [2023-11-23 20:38:22,419 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 [2023-11-23 20:38:22,424 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 3 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:22,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 924 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-11-23 20:38:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2023-11-23 20:38:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 302 states have (on average 1.6026490066225165) internal successors, (484), 371 states have internal predecessors, (484), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 539 transitions. [2023-11-23 20:38:22,473 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 539 transitions. Word has length 6 [2023-11-23 20:38:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:22,473 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 539 transitions. [2023-11-23 20:38:22,474 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) [2023-11-23 20:38:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 539 transitions. [2023-11-23 20:38:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:38:22,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:22,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-23 20:38:22,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 20:38:22,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:22,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 74793252, now seen corresponding path program 1 times [2023-11-23 20:38:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791923531] [2023-11-23 20:38:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:22,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:22,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791923531] [2023-11-23 20:38:22,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791923531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:22,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:22,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:38:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450776603] [2023-11-23 20:38:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:22,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:22,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:22,838 INFO L87 Difference]: Start difference. First operand 405 states and 539 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) [2023-11-23 20:38:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:23,092 INFO L93 Difference]: Finished difference Result 405 states and 539 transitions. [2023-11-23 20:38:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:23,093 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 [2023-11-23 20:38:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:23,096 INFO L225 Difference]: With dead ends: 405 [2023-11-23 20:38:23,096 INFO L226 Difference]: Without dead ends: 404 [2023-11-23 20:38:23,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:23,098 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 0 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:23,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 924 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:38:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-23 20:38:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2023-11-23 20:38:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 300 states have (on average 1.6033333333333333) internal successors, (481), 368 states have internal predecessors, (481), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 536 transitions. [2023-11-23 20:38:23,122 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 536 transitions. Word has length 7 [2023-11-23 20:38:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:23,122 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 536 transitions. [2023-11-23 20:38:23,123 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) [2023-11-23 20:38:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 536 transitions. [2023-11-23 20:38:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:38:23,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:23,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:23,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:38:23,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:23,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:23,124 INFO L85 PathProgramCache]: Analyzing trace with hash 214667403, now seen corresponding path program 1 times [2023-11-23 20:38:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3886012] [2023-11-23 20:38:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:23,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:23,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3886012] [2023-11-23 20:38:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3886012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236094164] [2023-11-23 20:38:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:23,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:23,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:23,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:23,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:38:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:23,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:23,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:23,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236094164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:23,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618296282] [2023-11-23 20:38:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:23,648 INFO L87 Difference]: Start difference. First operand 402 states and 536 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) [2023-11-23 20:38:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:23,887 INFO L93 Difference]: Finished difference Result 402 states and 536 transitions. [2023-11-23 20:38:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:23,888 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 [2023-11-23 20:38:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:23,891 INFO L225 Difference]: With dead ends: 402 [2023-11-23 20:38:23,892 INFO L226 Difference]: Without dead ends: 400 [2023-11-23 20:38:23,892 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 [2023-11-23 20:38:23,893 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 354 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:23,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 598 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:38:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-23 20:38:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2023-11-23 20:38:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 300 states have (on average 1.5966666666666667) internal successors, (479), 366 states have internal predecessors, (479), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 534 transitions. [2023-11-23 20:38:23,915 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 534 transitions. Word has length 9 [2023-11-23 20:38:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:23,916 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 534 transitions. [2023-11-23 20:38:23,916 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) [2023-11-23 20:38:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 534 transitions. [2023-11-23 20:38:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:38:23,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:23,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:23,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:24,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:24,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:24,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1935244721, now seen corresponding path program 1 times [2023-11-23 20:38:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:24,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86571513] [2023-11-23 20:38:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:24,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:24,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:24,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86571513] [2023-11-23 20:38:24,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86571513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488707574] [2023-11-23 20:38:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:24,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:24,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:24,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:38:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:24,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:38:24,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:24,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488707574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:38:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784443128] [2023-11-23 20:38:24,739 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 20:38:24,739 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:38:24,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:38:24,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:38:24,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:38:32,072 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 114 for LOIs [2023-11-23 20:38:32,125 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:38:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1784443128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:34,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:38:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 14 [2023-11-23 20:38:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705425365] [2023-11-23 20:38:34,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:34,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:38:34,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:38:34,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:34,125 INFO L87 Difference]: Start difference. First operand 400 states and 534 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) [2023-11-23 20:38:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:38,299 INFO L93 Difference]: Finished difference Result 402 states and 535 transitions. [2023-11-23 20:38:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:38:38,300 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 [2023-11-23 20:38:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:38,303 INFO L225 Difference]: With dead ends: 402 [2023-11-23 20:38:38,304 INFO L226 Difference]: Without dead ends: 400 [2023-11-23 20:38:38,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:38,305 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 6 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:38,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1874 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-23 20:38:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-23 20:38:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2023-11-23 20:38:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 301 states have (on average 1.5880398671096345) internal successors, (478), 365 states have internal predecessors, (478), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 533 transitions. [2023-11-23 20:38:38,334 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 533 transitions. Word has length 10 [2023-11-23 20:38:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:38,334 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 533 transitions. [2023-11-23 20:38:38,335 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) [2023-11-23 20:38:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 533 transitions. [2023-11-23 20:38:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:38:38,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:38,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:38,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:38,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:38,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:38,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash -578287080, now seen corresponding path program 1 times [2023-11-23 20:38:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202368307] [2023-11-23 20:38:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:38,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:38,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202368307] [2023-11-23 20:38:38,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202368307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:38,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393203282] [2023-11-23 20:38:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:38,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:38,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:38,801 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:38,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:38:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:39,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:39,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:39,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:39,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393203282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:39,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:39,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688075484] [2023-11-23 20:38:39,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:39,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:39,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:39,175 INFO L87 Difference]: Start difference. First operand 400 states and 533 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) [2023-11-23 20:38:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:39,498 INFO L93 Difference]: Finished difference Result 400 states and 533 transitions. [2023-11-23 20:38:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:39,499 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 [2023-11-23 20:38:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:39,504 INFO L225 Difference]: With dead ends: 400 [2023-11-23 20:38:39,504 INFO L226 Difference]: Without dead ends: 399 [2023-11-23 20:38:39,504 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 [2023-11-23 20:38:39,505 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 2 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:39,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 911 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-23 20:38:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2023-11-23 20:38:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 301 states have (on average 1.584717607973422) internal successors, (477), 364 states have internal predecessors, (477), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 532 transitions. [2023-11-23 20:38:39,541 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 532 transitions. Word has length 15 [2023-11-23 20:38:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:39,541 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 532 transitions. [2023-11-23 20:38:39,542 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) [2023-11-23 20:38:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 532 transitions. [2023-11-23 20:38:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:38:39,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:39,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:39,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:39,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:38:39,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:39,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash -578241625, now seen corresponding path program 1 times [2023-11-23 20:38:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:39,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670512641] [2023-11-23 20:38:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:39,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:39,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670512641] [2023-11-23 20:38:39,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670512641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:39,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613417694] [2023-11-23 20:38:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:39,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:39,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:39,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:38:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:40,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:40,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:40,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613417694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:40,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:40,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:40,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839330011] [2023-11-23 20:38:40,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:40,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:40,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:40,286 INFO L87 Difference]: Start difference. First operand 399 states and 532 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) [2023-11-23 20:38:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:40,608 INFO L93 Difference]: Finished difference Result 399 states and 532 transitions. [2023-11-23 20:38:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:40,609 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 [2023-11-23 20:38:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:40,613 INFO L225 Difference]: With dead ends: 399 [2023-11-23 20:38:40,613 INFO L226 Difference]: Without dead ends: 398 [2023-11-23 20:38:40,614 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 [2023-11-23 20:38:40,614 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 6 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:40,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 904 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-23 20:38:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2023-11-23 20:38:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 301 states have (on average 1.5813953488372092) internal successors, (476), 363 states have internal predecessors, (476), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 531 transitions. [2023-11-23 20:38:40,656 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 531 transitions. Word has length 15 [2023-11-23 20:38:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:40,656 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 531 transitions. [2023-11-23 20:38:40,657 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) [2023-11-23 20:38:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 531 transitions. [2023-11-23 20:38:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:38:40,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:40,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:40,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-23 20:38:40,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:38:40,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:40,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash -701397961, now seen corresponding path program 1 times [2023-11-23 20:38:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:40,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008470807] [2023-11-23 20:38:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:40,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:41,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008470807] [2023-11-23 20:38:41,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008470807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:41,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070485548] [2023-11-23 20:38:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:41,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:41,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:41,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:38:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:41,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:41,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:41,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:41,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070485548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:41,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:41,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053351894] [2023-11-23 20:38:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:41,446 INFO L87 Difference]: Start difference. First operand 398 states and 531 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) [2023-11-23 20:38:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:41,729 INFO L93 Difference]: Finished difference Result 400 states and 533 transitions. [2023-11-23 20:38:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:41,730 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 [2023-11-23 20:38:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:41,733 INFO L225 Difference]: With dead ends: 400 [2023-11-23 20:38:41,733 INFO L226 Difference]: Without dead ends: 399 [2023-11-23 20:38:41,733 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 [2023-11-23 20:38:41,734 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 258 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:41,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 673 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-23 20:38:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 397. [2023-11-23 20:38:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 301 states have (on average 1.5780730897009967) internal successors, (475), 362 states have internal predecessors, (475), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 530 transitions. [2023-11-23 20:38:41,756 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 530 transitions. Word has length 16 [2023-11-23 20:38:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:41,756 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 530 transitions. [2023-11-23 20:38:41,756 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) [2023-11-23 20:38:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 530 transitions. [2023-11-23 20:38:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:38:41,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:41,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:41,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:41,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 20:38:41,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:41,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash -747029893, now seen corresponding path program 1 times [2023-11-23 20:38:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:41,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364488330] [2023-11-23 20:38:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:41,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:42,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:42,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364488330] [2023-11-23 20:38:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364488330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:42,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266231470] [2023-11-23 20:38:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:42,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:42,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:42,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:42,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:38:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:42,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:42,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:42,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266231470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:42,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870728086] [2023-11-23 20:38:42,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:42,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:42,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:42,442 INFO L87 Difference]: Start difference. First operand 397 states and 530 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) [2023-11-23 20:38:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:42,717 INFO L93 Difference]: Finished difference Result 785 states and 1052 transitions. [2023-11-23 20:38:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:42,718 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 [2023-11-23 20:38:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:42,721 INFO L225 Difference]: With dead ends: 785 [2023-11-23 20:38:42,721 INFO L226 Difference]: Without dead ends: 400 [2023-11-23 20:38:42,723 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 [2023-11-23 20:38:42,724 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 0 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:42,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 908 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:38:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-23 20:38:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2023-11-23 20:38:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 304 states have (on average 1.5723684210526316) internal successors, (478), 365 states have internal predecessors, (478), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 533 transitions. [2023-11-23 20:38:42,747 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 533 transitions. Word has length 16 [2023-11-23 20:38:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:42,747 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 533 transitions. [2023-11-23 20:38:42,747 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) [2023-11-23 20:38:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 533 transitions. [2023-11-23 20:38:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:38:42,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:42,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:42,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:42,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:42,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash -268499881, now seen corresponding path program 1 times [2023-11-23 20:38:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:42,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340943692] [2023-11-23 20:38:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:43,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340943692] [2023-11-23 20:38:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340943692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091997693] [2023-11-23 20:38:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:43,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:43,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:43,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:38:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:43,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:43,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:43,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:43,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091997693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:43,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:43,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302546894] [2023-11-23 20:38:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:43,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:43,454 INFO L87 Difference]: Start difference. First operand 400 states and 533 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) [2023-11-23 20:38:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:43,816 INFO L93 Difference]: Finished difference Result 600 states and 813 transitions. [2023-11-23 20:38:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:43,817 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 [2023-11-23 20:38:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:43,821 INFO L225 Difference]: With dead ends: 600 [2023-11-23 20:38:43,821 INFO L226 Difference]: Without dead ends: 599 [2023-11-23 20:38:43,822 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 [2023-11-23 20:38:43,823 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 256 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:43,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 897 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2023-11-23 20:38:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 404. [2023-11-23 20:38:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 308 states have (on average 1.5681818181818181) internal successors, (483), 369 states have internal predecessors, (483), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 538 transitions. [2023-11-23 20:38:43,849 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 538 transitions. Word has length 17 [2023-11-23 20:38:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:43,850 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 538 transitions. [2023-11-23 20:38:43,850 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) [2023-11-23 20:38:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 538 transitions. [2023-11-23 20:38:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:38:43,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:43,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:43,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:44,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 20:38:44,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:44,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1753380821, now seen corresponding path program 1 times [2023-11-23 20:38:44,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:44,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28068974] [2023-11-23 20:38:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:44,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:38:44,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:44,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28068974] [2023-11-23 20:38:44,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28068974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:44,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129932084] [2023-11-23 20:38:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:44,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:44,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:44,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:38:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:44,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:44,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:38:44,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129932084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:44,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:44,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876336376] [2023-11-23 20:38:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:44,591 INFO L87 Difference]: Start difference. First operand 404 states and 538 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) [2023-11-23 20:38:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:44,874 INFO L93 Difference]: Finished difference Result 404 states and 538 transitions. [2023-11-23 20:38:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:44,875 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 [2023-11-23 20:38:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:44,878 INFO L225 Difference]: With dead ends: 404 [2023-11-23 20:38:44,878 INFO L226 Difference]: Without dead ends: 403 [2023-11-23 20:38:44,879 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 [2023-11-23 20:38:44,880 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 0 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:44,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 907 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-11-23 20:38:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 401. [2023-11-23 20:38:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 306 states have (on average 1.5686274509803921) internal successors, (480), 366 states have internal predecessors, (480), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 535 transitions. [2023-11-23 20:38:44,904 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 535 transitions. Word has length 19 [2023-11-23 20:38:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:44,904 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 535 transitions. [2023-11-23 20:38:44,905 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) [2023-11-23 20:38:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 535 transitions. [2023-11-23 20:38:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:38:44,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:44,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:44,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:45,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:45,129 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:45,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:45,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1754789935, now seen corresponding path program 1 times [2023-11-23 20:38:45,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:45,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466388865] [2023-11-23 20:38:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:45,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:38:45,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:45,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466388865] [2023-11-23 20:38:45,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466388865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:45,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883090831] [2023-11-23 20:38:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:45,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:45,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:45,292 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:45,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 20:38:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:45,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:38:45,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:38:45,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883090831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:45,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:45,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:38:45,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546293550] [2023-11-23 20:38:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:45,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:45,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:45,682 INFO L87 Difference]: Start difference. First operand 401 states and 535 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) [2023-11-23 20:38:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:46,003 INFO L93 Difference]: Finished difference Result 409 states and 545 transitions. [2023-11-23 20:38:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:46,004 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 [2023-11-23 20:38:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:46,008 INFO L225 Difference]: With dead ends: 409 [2023-11-23 20:38:46,008 INFO L226 Difference]: Without dead ends: 408 [2023-11-23 20:38:46,009 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 [2023-11-23 20:38:46,009 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 0 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:46,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 904 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:38:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-23 20:38:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-11-23 20:38:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 313 states have (on average 1.5623003194888179) internal successors, (489), 373 states have internal predecessors, (489), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:38:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 544 transitions. [2023-11-23 20:38:46,036 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 544 transitions. Word has length 19 [2023-11-23 20:38:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:46,036 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 544 transitions. [2023-11-23 20:38:46,037 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) [2023-11-23 20:38:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 544 transitions. [2023-11-23 20:38:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:38:46,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:46,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:46,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:46,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 20:38:46,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [full_writeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, full_writeErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_verror_msgErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 61 more)] === [2023-11-23 20:38:46,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash 376200606, now seen corresponding path program 1 times [2023-11-23 20:38:46,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:46,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120557112] [2023-11-23 20:38:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:46,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:38:46,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120557112] [2023-11-23 20:38:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120557112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:46,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605126175] [2023-11-23 20:38:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:46,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:46,408 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:46,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8fb4323-9a9d-4c84-81e7-1e1d3b1ac3f0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 20:38:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:46,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:38:46,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:38:46,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:38:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605126175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:38:46,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1926737933] [2023-11-23 20:38:46,844 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-23 20:38:46,844 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:38:46,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:38:46,845 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:38:46,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:38:52,634 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 114 for LOIs [2023-11-23 20:38:52,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:38:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1926737933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:57,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:38:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 3, 4] total 16 [2023-11-23 20:38:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878950010] [2023-11-23 20:38:57,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 20:38:57,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 20:38:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2023-11-23 20:38:57,524 INFO L87 Difference]: Start difference. First operand 408 states and 544 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:39:00,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]