./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/stty-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/stty-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e0ada5a793906a8c21c0c37214d90767529226ee2d6e9139376b7842d17987b9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:17:06,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:17:06,573 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-24 23:17:06,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:17:06,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:17:06,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:17:06,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:17:06,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:17:06,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:17:06,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:17:06,629 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:17:06,630 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:17:06,630 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:17:06,632 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:17:06,632 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:17:06,633 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:17:06,633 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:17:06,634 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:17:06,634 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:17:06,635 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:17:06,635 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:17:06,636 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:17:06,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:17:06,637 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:17:06,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:17:06,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:17:06,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:17:06,639 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:17:06,639 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:17:06,640 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:17:06,641 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:17:06,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:17:06,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:17:06,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:17:06,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:17:06,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:17:06,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:17:06,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:17:06,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:17:06,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:17:06,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:17:06,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:17:06,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:17:06,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:17:06,646 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:17:06,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:17:06,646 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_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0ada5a793906a8c21c0c37214d90767529226ee2d6e9139376b7842d17987b9 [2023-11-24 23:17:06,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:17:06,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:17:06,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:17:06,979 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:17:06,981 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:17:06,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/busybox-1.22.0/stty-1.i [2023-11-24 23:17:10,224 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:17:10,765 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:17:10,766 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/sv-benchmarks/c/busybox-1.22.0/stty-1.i [2023-11-24 23:17:10,813 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/data/2bed42cd0/3d9d6d08d3f448a48f46e384f8f1fe71/FLAG0367bba71 [2023-11-24 23:17:10,830 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/data/2bed42cd0/3d9d6d08d3f448a48f46e384f8f1fe71 [2023-11-24 23:17:10,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:17:10,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:17:10,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:17:10,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:17:10,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:17:10,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:17:10" (1/1) ... [2023-11-24 23:17:10,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59789106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:10, skipping insertion in model container [2023-11-24 23:17:10,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:17:10" (1/1) ... [2023-11-24 23:17:11,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:17:13,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:17:13,454 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:17:13,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:17:14,080 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,080 WARN L675 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,081 WARN L675 CHandler]: The function strtoull is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,081 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,081 WARN L675 CHandler]: The function output_func is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,081 WARN L675 CHandler]: The function putchar is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,081 WARN L675 CHandler]: The function strtoul is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,082 WARN L675 CHandler]: The function fputs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,082 WARN L675 CHandler]: The function vsnprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,082 WARN L675 CHandler]: The function close is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:14,090 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:17:14,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14 WrapperNode [2023-11-24 23:17:14,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:17:14,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:17:14,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:17:14,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:17:14,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,457 INFO L138 Inliner]: procedures = 676, calls = 2288, calls flagged for inlining = 37, calls inlined = 35, statements flattened = 4481 [2023-11-24 23:17:14,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:17:14,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:17:14,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:17:14,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:17:14,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,541 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:17:14,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:17:14,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:17:14,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:17:14,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (1/1) ... [2023-11-24 23:17:14,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:17:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:14,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:17:14,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:17:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2023-11-24 23:17:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure bb_putchar [2023-11-24 23:17:14,906 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_putchar [2023-11-24 23:17:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure fcntl [2023-11-24 23:17:14,906 INFO L138 BoogieDeclarations]: Found implementation of procedure fcntl [2023-11-24 23:17:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure get_terminal_width_height [2023-11-24 23:17:14,907 INFO L138 BoogieDeclarations]: Found implementation of procedure get_terminal_width_height [2023-11-24 23:17:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure close [2023-11-24 23:17:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure set_control_char_or_die [2023-11-24 23:17:14,907 INFO L138 BoogieDeclarations]: Found implementation of procedure set_control_char_or_die [2023-11-24 23:17:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-24 23:17:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-24 23:17:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:17:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure perror_on_device_and_die [2023-11-24 23:17:14,908 INFO L138 BoogieDeclarations]: Found implementation of procedure perror_on_device_and_die [2023-11-24 23:17:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure set_window_size [2023-11-24 23:17:14,908 INFO L138 BoogieDeclarations]: Found implementation of procedure set_window_size [2023-11-24 23:17:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-24 23:17:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure bb_verror_msg [2023-11-24 23:17:14,908 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_verror_msg [2023-11-24 23:17:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure xatoul_sfx [2023-11-24 23:17:14,909 INFO L138 BoogieDeclarations]: Found implementation of procedure xatoul_sfx [2023-11-24 23:17:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure find_param [2023-11-24 23:17:14,909 INFO L138 BoogieDeclarations]: Found implementation of procedure find_param [2023-11-24 23:17:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure xatoul_range_sfx [2023-11-24 23:17:14,909 INFO L138 BoogieDeclarations]: Found implementation of procedure xatoul_range_sfx [2023-11-24 23:17:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-24 23:17:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:17:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure tty_value_to_baud [2023-11-24 23:17:14,909 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_value_to_baud [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2023-11-24 23:17:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure nth_string [2023-11-24 23:17:14,910 INFO L138 BoogieDeclarations]: Found implementation of procedure nth_string [2023-11-24 23:17:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure find_mode [2023-11-24 23:17:14,911 INFO L138 BoogieDeclarations]: Found implementation of procedure find_mode [2023-11-24 23:17:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:17:14,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:17:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-24 23:17:14,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-24 23:17:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-24 23:17:14,911 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-24 23:17:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-24 23:17:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-24 23:17:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure display_speed [2023-11-24 23:17:14,912 INFO L138 BoogieDeclarations]: Found implementation of procedure display_speed [2023-11-24 23:17:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure tty_baud_to_value [2023-11-24 23:17:14,912 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_baud_to_value [2023-11-24 23:17:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure bb_perror_msg_and_die [2023-11-24 23:17:14,912 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_perror_msg_and_die [2023-11-24 23:17:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure get_ptr_to_tcflag [2023-11-24 23:17:14,913 INFO L138 BoogieDeclarations]: Found implementation of procedure get_ptr_to_tcflag [2023-11-24 23:17:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure tcgetattr [2023-11-24 23:17:14,913 INFO L138 BoogieDeclarations]: Found implementation of procedure tcgetattr [2023-11-24 23:17:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure recover_mode [2023-11-24 23:17:14,913 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_mode [2023-11-24 23:17:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-24 23:17:14,913 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-24 23:17:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:17:14,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:17:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:17:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure set_speed_or_die [2023-11-24 23:17:14,914 INFO L138 BoogieDeclarations]: Found implementation of procedure set_speed_or_die [2023-11-24 23:17:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:17:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure xstrtoull_range_sfx [2023-11-24 23:17:14,914 INFO L138 BoogieDeclarations]: Found implementation of procedure xstrtoull_range_sfx [2023-11-24 23:17:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:17:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure ioctl [2023-11-24 23:17:14,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ioctl [2023-11-24 23:17:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure find_control [2023-11-24 23:17:14,915 INFO L138 BoogieDeclarations]: Found implementation of procedure find_control [2023-11-24 23:17:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure xatou [2023-11-24 23:17:14,915 INFO L138 BoogieDeclarations]: Found implementation of procedure xatou [2023-11-24 23:17:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure perror_on_device [2023-11-24 23:17:14,915 INFO L138 BoogieDeclarations]: Found implementation of procedure perror_on_device [2023-11-24 23:17:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure wh_helper [2023-11-24 23:17:14,916 INFO L138 BoogieDeclarations]: Found implementation of procedure wh_helper [2023-11-24 23:17:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode [2023-11-24 23:17:14,916 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode [2023-11-24 23:17:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-11-24 23:17:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:17:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure index_in_strings [2023-11-24 23:17:14,916 INFO L138 BoogieDeclarations]: Found implementation of procedure index_in_strings [2023-11-24 23:17:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure newline [2023-11-24 23:17:14,917 INFO L138 BoogieDeclarations]: Found implementation of procedure newline [2023-11-24 23:17:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure wrapf [2023-11-24 23:17:14,917 INFO L138 BoogieDeclarations]: Found implementation of procedure wrapf [2023-11-24 23:17:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-11-24 23:17:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2023-11-24 23:17:14,917 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2023-11-24 23:17:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure display_window_size [2023-11-24 23:17:14,917 INFO L138 BoogieDeclarations]: Found implementation of procedure display_window_size [2023-11-24 23:17:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:17:15,616 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:17:15,621 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:17:20,587 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:17:23,019 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:17:23,020 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-24 23:17:23,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:17:23 BoogieIcfgContainer [2023-11-24 23:17:23,022 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:17:23,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:17:23,027 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:17:23,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:17:23,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:17:10" (1/3) ... [2023-11-24 23:17:23,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed31648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:17:23, skipping insertion in model container [2023-11-24 23:17:23,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:14" (2/3) ... [2023-11-24 23:17:23,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed31648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:17:23, skipping insertion in model container [2023-11-24 23:17:23,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:17:23" (3/3) ... [2023-11-24 23:17:23,037 INFO L112 eAbstractionObserver]: Analyzing ICFG stty-1.i [2023-11-24 23:17:23,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:17:23,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 140 error locations. [2023-11-24 23:17:23,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:17:23,170 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;@2ee7676, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:17:23,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 140 error locations. [2023-11-24 23:17:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 934 states, 610 states have (on average 1.6114754098360655) internal successors, (983), 792 states have internal predecessors, (983), 147 states have call successors, (147), 36 states have call predecessors, (147), 36 states have return successors, (147), 143 states have call predecessors, (147), 147 states have call successors, (147) [2023-11-24 23:17:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:17:23,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:23,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:17:23,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [set_control_char_or_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, set_control_char_or_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 138 more)] === [2023-11-24 23:17:23,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:23,205 INFO L85 PathProgramCache]: Analyzing trace with hash 3879933, now seen corresponding path program 1 times [2023-11-24 23:17:23,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545489433] [2023-11-24 23:17:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:24,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545489433] [2023-11-24 23:17:24,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545489433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:24,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:17:24,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:17:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937048007] [2023-11-24 23:17:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:24,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:17:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:17:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:17:24,362 INFO L87 Difference]: Start difference. First operand has 934 states, 610 states have (on average 1.6114754098360655) internal successors, (983), 792 states have internal predecessors, (983), 147 states have call successors, (147), 36 states have call predecessors, (147), 36 states have return successors, (147), 143 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:17:27,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:29,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:29,535 INFO L93 Difference]: Finished difference Result 1843 states and 2598 transitions. [2023-11-24 23:17:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:17:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 23:17:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:29,569 INFO L225 Difference]: With dead ends: 1843 [2023-11-24 23:17:29,570 INFO L226 Difference]: Without dead ends: 878 [2023-11-24 23:17:29,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:17:29,585 INFO L413 NwaCegarLoop]: 1082 mSDtfsCounter, 1 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:29,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2162 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2023-11-24 23:17:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-24 23:17:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2023-11-24 23:17:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 592 states have (on average 1.5456081081081081) internal successors, (915), 755 states have internal predecessors, (915), 116 states have call successors, (116), 35 states have call predecessors, (116), 32 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-24 23:17:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1127 transitions. [2023-11-24 23:17:29,718 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1127 transitions. Word has length 3 [2023-11-24 23:17:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:29,719 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1127 transitions. [2023-11-24 23:17:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:17:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1127 transitions. [2023-11-24 23:17:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:17:29,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:29,721 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-24 23:17:29,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:17:29,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [set_control_char_or_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, set_control_char_or_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 138 more)] === [2023-11-24 23:17:29,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -374780029, now seen corresponding path program 1 times [2023-11-24 23:17:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:29,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228526250] [2023-11-24 23:17:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:30,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228526250] [2023-11-24 23:17:30,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228526250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:30,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610102167] [2023-11-24 23:17:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:30,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:30,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:30,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:30,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:17:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:31,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 2939 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:17:31,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:31,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:17:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610102167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:31,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:17:31,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-24 23:17:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593536185] [2023-11-24 23:17:31,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:31,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:17:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:17:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:31,758 INFO L87 Difference]: Start difference. First operand 878 states and 1127 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:17:34,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:36,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:38,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:38,940 INFO L93 Difference]: Finished difference Result 878 states and 1127 transitions. [2023-11-24 23:17:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:17:38,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 23:17:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:38,956 INFO L225 Difference]: With dead ends: 878 [2023-11-24 23:17:38,956 INFO L226 Difference]: Without dead ends: 877 [2023-11-24 23:17:38,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:38,958 INFO L413 NwaCegarLoop]: 1016 mSDtfsCounter, 3 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:38,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2032 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2023-11-24 23:17:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-11-24 23:17:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2023-11-24 23:17:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 592 states have (on average 1.5439189189189189) internal successors, (914), 754 states have internal predecessors, (914), 116 states have call successors, (116), 35 states have call predecessors, (116), 32 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-24 23:17:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1126 transitions. [2023-11-24 23:17:39,007 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1126 transitions. Word has length 6 [2023-11-24 23:17:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:39,008 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1126 transitions. [2023-11-24 23:17:39,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:17:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1126 transitions. [2023-11-24 23:17:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:17:39,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:39,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-24 23:17:39,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:17:39,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:39,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [set_control_char_or_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, set_control_char_or_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 138 more)] === [2023-11-24 23:17:39,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1266723258, now seen corresponding path program 1 times [2023-11-24 23:17:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:39,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935479663] [2023-11-24 23:17:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:39,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:17:39,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935479663] [2023-11-24 23:17:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935479663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:39,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:17:39,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:17:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571220215] [2023-11-24 23:17:39,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:17:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:17:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:17:39,767 INFO L87 Difference]: Start difference. First operand 877 states and 1126 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:17:42,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:44,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:44,807 INFO L93 Difference]: Finished difference Result 877 states and 1126 transitions. [2023-11-24 23:17:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:17:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 23:17:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:44,815 INFO L225 Difference]: With dead ends: 877 [2023-11-24 23:17:44,815 INFO L226 Difference]: Without dead ends: 876 [2023-11-24 23:17:44,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:17:44,817 INFO L413 NwaCegarLoop]: 1016 mSDtfsCounter, 0 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:44,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2032 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2023-11-24 23:17:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2023-11-24 23:17:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 874. [2023-11-24 23:17:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 590 states have (on average 1.5440677966101695) internal successors, (911), 751 states have internal predecessors, (911), 116 states have call successors, (116), 35 states have call predecessors, (116), 32 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-24 23:17:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1123 transitions. [2023-11-24 23:17:44,856 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1123 transitions. Word has length 7 [2023-11-24 23:17:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:44,857 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1123 transitions. [2023-11-24 23:17:44,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:17:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1123 transitions. [2023-11-24 23:17:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:17:44,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:44,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:17:44,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:17:44,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [set_control_char_or_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, set_control_char_or_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 138 more)] === [2023-11-24 23:17:44,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:44,859 INFO L85 PathProgramCache]: Analyzing trace with hash -532702395, now seen corresponding path program 1 times [2023-11-24 23:17:44,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:44,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465835937] [2023-11-24 23:17:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:44,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:45,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465835937] [2023-11-24 23:17:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465835937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351039753] [2023-11-24 23:17:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:45,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:45,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:17:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:46,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:17:46,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:17:46,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:17:46,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351039753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:46,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:17:46,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:17:46,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879324472] [2023-11-24 23:17:46,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:46,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:17:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:46,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:17:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:46,584 INFO L87 Difference]: Start difference. First operand 874 states and 1123 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:49,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:17:51,455 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 [] [2023-11-24 23:17:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:51,757 INFO L93 Difference]: Finished difference Result 874 states and 1123 transitions. [2023-11-24 23:17:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:17:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-24 23:17:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:51,764 INFO L225 Difference]: With dead ends: 874 [2023-11-24 23:17:51,765 INFO L226 Difference]: Without dead ends: 872 [2023-11-24 23:17:51,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:51,767 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 395 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:51,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1612 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2023-11-24 23:17:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2023-11-24 23:17:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2023-11-24 23:17:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 590 states have (on average 1.540677966101695) internal successors, (909), 749 states have internal predecessors, (909), 116 states have call successors, (116), 35 states have call predecessors, (116), 32 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-24 23:17:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1121 transitions. [2023-11-24 23:17:51,815 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1121 transitions. Word has length 9 [2023-11-24 23:17:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:51,816 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1121 transitions. [2023-11-24 23:17:51,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:17:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1121 transitions. [2023-11-24 23:17:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:17:51,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:51,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:17:51,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:17:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:52,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [set_control_char_or_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, set_control_char_or_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 138 more)] === [2023-11-24 23:17:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 666097217, now seen corresponding path program 1 times [2023-11-24 23:17:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185672526] [2023-11-24 23:17:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:52,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:52,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:52,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185672526] [2023-11-24 23:17:52,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185672526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:52,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802886909] [2023-11-24 23:17:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:52,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:52,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4dc6710-4941-4ca4-8f18-517d529a4762/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:17:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:53,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 2956 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:17:53,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:53,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:17:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:53,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802886909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:17:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012202882] [2023-11-24 23:17:53,914 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-24 23:17:53,914 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:17:53,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:17:53,923 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:17:53,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs