./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:02:13,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:02:13,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:02:13,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:02:13,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:02:13,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:02:13,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:02:13,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:02:13,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:02:13,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:02:13,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:02:13,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:02:13,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:02:13,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:02:13,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:02:13,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:02:13,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:02:13,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:02:13,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:02:13,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:02:13,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:02:13,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:02:13,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:02:13,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:02:13,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:02:13,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:02:13,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:02:13,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:02:13,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:02:13,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:02:13,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:02:13,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:02:13,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:02:13,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:02:13,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:02:13,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:02:13,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:02:13,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:02:13,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:02:13,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:02:13,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:02:13,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:02:13,818 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:02:13,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:02:13,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:02:13,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:02:13,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:02:13,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:02:13,820 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:02:13,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:02:13,821 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:02:13,821 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:02:13,821 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:02:13,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:02:13,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:02:13,822 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:02:13,822 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:02:13,823 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:02:13,823 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:02:13,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:02:13,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:02:13,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:02:13,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:02:13,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:02:13,825 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:02:13,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:02:13,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:02:13,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:02:13,826 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:02:13,826 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:02:13,827 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:02:13,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:02:13,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:02:13,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:02:13,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:02:13,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:02:13,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:02:13,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:02:13,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:02:13,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:02:13,829 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:02:13,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:02:13,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:02:13,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:02:13,830 INFO L138 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_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2021-11-23 02:02:14,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:02:14,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:02:14,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:02:14,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:02:14,137 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:02:14,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2021-11-23 02:02:14,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/data/ca23e4ad3/8a766a522c5745f6931f4ec996d2532e/FLAG8c8bdc855 [2021-11-23 02:02:14,828 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:02:14,829 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2021-11-23 02:02:14,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/data/ca23e4ad3/8a766a522c5745f6931f4ec996d2532e/FLAG8c8bdc855 [2021-11-23 02:02:15,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/data/ca23e4ad3/8a766a522c5745f6931f4ec996d2532e [2021-11-23 02:02:15,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:02:15,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:02:15,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:02:15,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:02:15,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:02:15,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78eef694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15, skipping insertion in model container [2021-11-23 02:02:15,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:02:15,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:02:15,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2021-11-23 02:02:15,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:15,477 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:02:15,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2021-11-23 02:02:15,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:15,520 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:02:15,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15 WrapperNode [2021-11-23 02:02:15,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:02:15,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:02:15,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:02:15,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:02:15,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,569 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-23 02:02:15,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:02:15,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:02:15,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:02:15,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:02:15,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:02:15,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:02:15,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:02:15,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:02:15,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (1/1) ... [2021-11-23 02:02:15,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:02:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:15,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:02:15,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:02:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:02:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:02:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:02:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:02:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:02:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:02:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:02:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:02:15,807 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:02:15,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:02:16,070 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:02:16,109 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:02:16,109 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:02:16,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:16 BoogieIcfgContainer [2021-11-23 02:02:16,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:02:16,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:02:16,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:02:16,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:02:16,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:02:15" (1/3) ... [2021-11-23 02:02:16,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a41f045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:16, skipping insertion in model container [2021-11-23 02:02:16,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:15" (2/3) ... [2021-11-23 02:02:16,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a41f045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:16, skipping insertion in model container [2021-11-23 02:02:16,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:16" (3/3) ... [2021-11-23 02:02:16,139 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2021-11-23 02:02:16,146 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:02:16,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-23 02:02:16,222 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:02:16,243 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:02:16,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-23 02:02:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 29 states have internal predecessors, (34), 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) [2021-11-23 02:02:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:02:16,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:16,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:02:16,274 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash 113238, now seen corresponding path program 1 times [2021-11-23 02:02:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660419330] [2021-11-23 02:02:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:16,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:16,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660419330] [2021-11-23 02:02:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660419330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:16,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:16,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:16,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642534705] [2021-11-23 02:02:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:16,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:16,526 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 29 states have internal predecessors, (34), 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) Second operand has 3 states, 3 states have (on average 1.0) 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) [2021-11-23 02:02:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:16,687 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-23 02:02:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 [2021-11-23 02:02:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:16,706 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:02:16,706 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:02:16,708 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:02:16,713 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:16,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:02:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2021-11-23 02:02:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 2.0) internal successors, (32), 29 states have internal predecessors, (32), 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) [2021-11-23 02:02:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-23 02:02:16,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2021-11-23 02:02:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:16,762 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-23 02:02:16,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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) [2021-11-23 02:02:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-23 02:02:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:02:16,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:16,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:02:16,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:02:16,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 110837, now seen corresponding path program 1 times [2021-11-23 02:02:16,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:16,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429832376] [2021-11-23 02:02:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:16,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:16,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:16,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429832376] [2021-11-23 02:02:16,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429832376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:16,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:16,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 02:02:16,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220532202] [2021-11-23 02:02:16,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:16,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:16,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:16,837 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. 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) [2021-11-23 02:02:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:16,883 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-23 02:02:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:16,884 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 [2021-11-23 02:02:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:16,885 INFO L225 Difference]: With dead ends: 26 [2021-11-23 02:02:16,886 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:02:16,886 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:02:16,889 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:16,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:02:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 02:02:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.75) internal successors, (28), 25 states have internal predecessors, (28), 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) [2021-11-23 02:02:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-23 02:02:16,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 3 [2021-11-23 02:02:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-23 02:02:16,898 INFO L471 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) [2021-11-23 02:02:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-23 02:02:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 02:02:16,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:16,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 02:02:16,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:02:16,900 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash 110838, now seen corresponding path program 1 times [2021-11-23 02:02:16,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:16,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568772039] [2021-11-23 02:02:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:16,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:17,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568772039] [2021-11-23 02:02:17,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568772039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:17,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:17,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 02:02:17,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423584822] [2021-11-23 02:02:17,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:17,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:17,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:17,022 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. 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) [2021-11-23 02:02:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:17,074 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-11-23 02:02:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:17,075 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 [2021-11-23 02:02:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:17,076 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:02:17,076 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 02:02:17,076 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:02:17,079 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:17,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 02:02:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 02:02:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-11-23 02:02:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-23 02:02:17,086 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 3 [2021-11-23 02:02:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:17,087 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-23 02:02:17,087 INFO L471 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) [2021-11-23 02:02:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-23 02:02:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:02:17,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:17,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:02:17,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:02:17,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 106585312, now seen corresponding path program 1 times [2021-11-23 02:02:17,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:17,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827864396] [2021-11-23 02:02:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:17,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:17,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827864396] [2021-11-23 02:02:17,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827864396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:17,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976493574] [2021-11-23 02:02:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:17,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:17,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:17,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:02:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:02:17,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:17,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:17,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976493574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882081152] [2021-11-23 02:02:17,484 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:02:17,485 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:17,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:17,499 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:17,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:17,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:02:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:18,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:18,098 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:02:18,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 255 [2021-11-23 02:02:18,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:18,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:18,568 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:18,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1882081152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:18,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:18,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-23 02:02:18,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91781007] [2021-11-23 02:02:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:02:18,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:02:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:02:18,947 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-23 02:02:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:19,310 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-23 02:02:19,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:02:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-11-23 02:02:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:19,312 INFO L225 Difference]: With dead ends: 28 [2021-11-23 02:02:19,312 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 02:02:19,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:02:19,314 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:19,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-11-23 02:02:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 02:02:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 02:02:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 states have internal predecessors, (30), 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) [2021-11-23 02:02:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-23 02:02:19,327 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 5 [2021-11-23 02:02:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:19,328 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-23 02:02:19,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-23 02:02:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-23 02:02:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:02:19,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:19,331 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-23 02:02:19,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:02:19,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:19,532 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash 106582911, now seen corresponding path program 1 times [2021-11-23 02:02:19,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606118705] [2021-11-23 02:02:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:19,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:19,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606118705] [2021-11-23 02:02:19,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606118705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604309509] [2021-11-23 02:02:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:19,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:19,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:19,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:02:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:02:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:19,748 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:02:19,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:02:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:19,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:19,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604309509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:19,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987255948] [2021-11-23 02:02:19,869 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-23 02:02:19,869 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:19,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:19,870 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:19,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:19,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:19,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:02:20,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:20,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:20,147 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:02:20,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:02:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:20,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:20,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:20,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '359#(and (<= |ULTIMATE.start_main_#t~nondet2#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet2#1|)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:02:20,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:20,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:20,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-23 02:02:20,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837519982] [2021-11-23 02:02:20,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:20,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:02:20,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:02:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:02:20,698 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-23 02:02:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:20,842 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-23 02:02:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:02:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 5 [2021-11-23 02:02:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:20,845 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:02:20,845 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 02:02:20,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:02:20,847 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:20,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 02:02:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 02:02:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-11-23 02:02:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 02:02:20,854 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 5 [2021-11-23 02:02:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:20,855 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 02:02:20,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-23 02:02:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 02:02:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:02:20,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:20,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:20,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:02:21,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:21,077 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -652077635, now seen corresponding path program 1 times [2021-11-23 02:02:21,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:21,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095735497] [2021-11-23 02:02:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:21,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:21,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:21,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095735497] [2021-11-23 02:02:21,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095735497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:21,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:21,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 02:02:21,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235908425] [2021-11-23 02:02:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:21,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:21,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:21,122 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-23 02:02:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:21,148 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-23 02:02:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 10 [2021-11-23 02:02:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:21,150 INFO L225 Difference]: With dead ends: 31 [2021-11-23 02:02:21,150 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 02:02:21,151 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:02:21,155 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:21,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 02:02:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 02:02:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-11-23 02:02:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 02:02:21,172 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 10 [2021-11-23 02:02:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:21,173 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 02:02:21,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-23 02:02:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 02:02:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:02:21,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:21,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:21,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:02:21,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash -652077634, now seen corresponding path program 1 times [2021-11-23 02:02:21,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:21,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123322256] [2021-11-23 02:02:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:21,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:21,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:21,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123322256] [2021-11-23 02:02:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123322256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371924321] [2021-11-23 02:02:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:21,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:21,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:21,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:02:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:02:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:21,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:21,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371924321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221476001] [2021-11-23 02:02:21,408 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:02:21,408 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:21,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:21,409 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:21,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:02:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:21,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:21,649 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:02:21,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:02:21,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:21,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:22,071 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:22,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_66| 4))) 2147483647) (<= (+ (* 4 |v_ULTIMATE.start_main_~i~0#1_66|) |ULTIMATE.start_main_~#src~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_66|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_66| 4))) 2147483648)) (<= 4 (+ (* 4 |v_ULTIMATE.start_main_~i~0#1_66|) |ULTIMATE.start_main_~#src~0#1.offset|)))) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset| 4)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:02:22,829 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:22,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:22,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 02:02:22,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758379944] [2021-11-23 02:02:22,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:22,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:02:22,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:02:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:02:22,831 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-23 02:02:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:23,013 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2021-11-23 02:02:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:02:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 10 [2021-11-23 02:02:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:23,016 INFO L225 Difference]: With dead ends: 141 [2021-11-23 02:02:23,016 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 02:02:23,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:02:23,018 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 263 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:23,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 80 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:02:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 02:02:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 34. [2021-11-23 02:02:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 33 states have internal predecessors, (37), 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) [2021-11-23 02:02:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-23 02:02:23,025 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 10 [2021-11-23 02:02:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-23 02:02:23,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-23 02:02:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-23 02:02:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:02:23,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:23,027 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-11-23 02:02:23,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:23,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:23,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash -891058790, now seen corresponding path program 2 times [2021-11-23 02:02:23,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:23,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310621068] [2021-11-23 02:02:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:23,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:23,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310621068] [2021-11-23 02:02:23,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310621068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:23,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470253625] [2021-11-23 02:02:23,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:02:23,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:23,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:23,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:23,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:02:23,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:02:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:02:23,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:02:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:23,485 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:02:23,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:02:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:02:23,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:02:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470253625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:23,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:02:23,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2021-11-23 02:02:23,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301009744] [2021-11-23 02:02:23,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:23,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:02:23,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:02:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:02:23,644 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-23 02:02:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:23,696 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-11-23 02:02:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:02:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 11 [2021-11-23 02:02:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:23,702 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:02:23,705 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 02:02:23,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:02:23,706 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:23,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 17 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 02:02:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 02:02:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 32 states have internal predecessors, (35), 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) [2021-11-23 02:02:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-23 02:02:23,717 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 11 [2021-11-23 02:02:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:23,718 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-23 02:02:23,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-23 02:02:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-23 02:02:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:02:23,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:23,720 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:23,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:23,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:23,933 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1149927578, now seen corresponding path program 2 times [2021-11-23 02:02:23,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840132082] [2021-11-23 02:02:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:23,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:24,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840132082] [2021-11-23 02:02:24,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840132082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92015324] [2021-11-23 02:02:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:02:24,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:24,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:24,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:24,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:02:24,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 02:02:24,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:02:24,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:02:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:24,115 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:02:24,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:02:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:02:24,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:02:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92015324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:24,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:02:24,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2021-11-23 02:02:24,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291553849] [2021-11-23 02:02:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:24,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:02:24,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:02:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:02:24,280 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-23 02:02:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:24,332 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-11-23 02:02:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:02:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 18 [2021-11-23 02:02:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:24,334 INFO L225 Difference]: With dead ends: 46 [2021-11-23 02:02:24,334 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 02:02:24,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:02:24,335 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:24,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 02:02:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2021-11-23 02:02:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-11-23 02:02:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-11-23 02:02:24,340 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 18 [2021-11-23 02:02:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:24,341 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-11-23 02:02:24,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-23 02:02:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-11-23 02:02:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:02:24,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:24,342 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:24,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:24,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:24,557 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1288017910, now seen corresponding path program 1 times [2021-11-23 02:02:24,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:24,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866819103] [2021-11-23 02:02:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:24,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:02:24,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866819103] [2021-11-23 02:02:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866819103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:24,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894836329] [2021-11-23 02:02:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:24,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:24,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:24,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:24,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:02:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:02:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:02:24,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:02:24,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894836329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:24,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382699337] [2021-11-23 02:02:24,969 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:02:24,969 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:24,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:24,970 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:24,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:02:25,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:25,179 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:02:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:02:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:25,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:25,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:25,568 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-23 02:02:25,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2021-11-23 02:02:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:25,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:25,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:25,877 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-23 02:02:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-23 02:02:26,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:26,026 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:26,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:26,085 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:26,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:26,161 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:27,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1115#(and (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |#NULL.base| 0) (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (<= 4 (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:02:27,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:27,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:27,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-11-23 02:02:27,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872094552] [2021-11-23 02:02:27,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:27,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:02:27,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:02:27,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:02:27,010 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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) [2021-11-23 02:02:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:27,380 INFO L93 Difference]: Finished difference Result 298 states and 314 transitions. [2021-11-23 02:02:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:02:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 19 [2021-11-23 02:02:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:27,385 INFO L225 Difference]: With dead ends: 298 [2021-11-23 02:02:27,385 INFO L226 Difference]: Without dead ends: 298 [2021-11-23 02:02:27,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:02:27,387 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 555 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:27,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 160 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:02:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-23 02:02:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 52. [2021-11-23 02:02:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 51 states have internal predecessors, (55), 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) [2021-11-23 02:02:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-23 02:02:27,417 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 19 [2021-11-23 02:02:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:27,418 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-23 02:02:27,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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) [2021-11-23 02:02:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-23 02:02:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:02:27,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:27,421 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:27,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:27,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:02:27,645 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1259811522, now seen corresponding path program 2 times [2021-11-23 02:02:27,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:27,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960323838] [2021-11-23 02:02:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:27,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:02:27,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:27,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960323838] [2021-11-23 02:02:27,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960323838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156608220] [2021-11-23 02:02:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:02:27,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:27,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:27,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:02:27,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:02:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:02:27,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:02:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-23 02:02:28,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:28,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 02:02:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-23 02:02:28,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156608220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690204756] [2021-11-23 02:02:28,409 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:02:28,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:28,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:28,410 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:28,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:28,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:02:28,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:28,596 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:02:28,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:02:28,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:28,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:28,872 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:28,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:02:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:28,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:28,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:28,992 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:02:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 113 [2021-11-23 02:02:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:29,062 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:29,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:29,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:29,106 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:29,134 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:29,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1700#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (<= 0 |#NULL.offset|) (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:02:29,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:29,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:29,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 24 [2021-11-23 02:02:29,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008673782] [2021-11-23 02:02:29,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:29,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:02:29,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:02:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:02:29,837 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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) [2021-11-23 02:02:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:31,178 INFO L93 Difference]: Finished difference Result 316 states and 333 transitions. [2021-11-23 02:02:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 02:02:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 35 [2021-11-23 02:02:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:31,181 INFO L225 Difference]: With dead ends: 316 [2021-11-23 02:02:31,181 INFO L226 Difference]: Without dead ends: 316 [2021-11-23 02:02:31,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 02:02:31,184 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1560 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:31,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 135 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:02:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-23 02:02:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 63. [2021-11-23 02:02:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 62 states have internal predecessors, (70), 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) [2021-11-23 02:02:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-11-23 02:02:31,194 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 35 [2021-11-23 02:02:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-11-23 02:02:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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) [2021-11-23 02:02:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-11-23 02:02:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:02:31,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:31,196 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:31,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:31,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:02:31,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash 950813964, now seen corresponding path program 1 times [2021-11-23 02:02:31,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:31,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936229842] [2021-11-23 02:02:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:31,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-23 02:02:31,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:31,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936229842] [2021-11-23 02:02:31,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936229842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:31,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:31,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:02:31,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453103937] [2021-11-23 02:02:31,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:31,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:02:31,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:02:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:02:31,509 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-23 02:02:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:31,547 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-11-23 02:02:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:02:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 37 [2021-11-23 02:02:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:31,551 INFO L225 Difference]: With dead ends: 67 [2021-11-23 02:02:31,552 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 02:02:31,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:02:31,554 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:31,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 02:02:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-11-23 02:02:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 64 states have internal predecessors, (72), 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) [2021-11-23 02:02:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-23 02:02:31,569 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 37 [2021-11-23 02:02:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:31,570 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-23 02:02:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-23 02:02:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-23 02:02:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:02:31,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:31,578 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:31,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:02:31,579 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 950815164, now seen corresponding path program 1 times [2021-11-23 02:02:31,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:31,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991527144] [2021-11-23 02:02:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:31,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:31,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991527144] [2021-11-23 02:02:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991527144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094243073] [2021-11-23 02:02:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:31,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:31,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:31,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:02:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:02:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:32,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:32,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094243073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332692493] [2021-11-23 02:02:32,567 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:02:32,568 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:32,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:32,568 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:32,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:02:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:32,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:32,749 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:02:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:02:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:32,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:33,090 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:02:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 77 [2021-11-23 02:02:33,152 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:33,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2521#(and (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_28| Int) (|v_ULTIMATE.start_main_~i~0#1_156| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_28|) 0) (<= 4 (* 4 |v_ULTIMATE.start_main_~i~0#1_156|)) (<= (* 4 |v_ULTIMATE.start_main_~i~0#1_156|) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_28|)) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_156|) (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_28|)) (<= 0 (+ 2147483648 (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_28|) (+ (- 4) (* |v_ULTIMATE.start_main_~i~0#1_156| 4))))) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_28|) (+ (- 4) (* |v_ULTIMATE.start_main_~i~0#1_156| 4))) 2147483647) (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_28|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_28|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 (* 4 |ULTIMATE.start_main_~i~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:02:33,798 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:33,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:33,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2021-11-23 02:02:33,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799473597] [2021-11-23 02:02:33,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:33,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:02:33,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:02:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=992, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:02:33,801 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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) [2021-11-23 02:02:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:34,520 INFO L93 Difference]: Finished difference Result 647 states and 680 transitions. [2021-11-23 02:02:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 02:02:34,521 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 37 [2021-11-23 02:02:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:34,525 INFO L225 Difference]: With dead ends: 647 [2021-11-23 02:02:34,525 INFO L226 Difference]: Without dead ends: 647 [2021-11-23 02:02:34,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=814, Invalid=992, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:02:34,527 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1669 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:34,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 330 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:02:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-23 02:02:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 99. [2021-11-23 02:02:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 98 states have internal predecessors, (106), 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) [2021-11-23 02:02:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-11-23 02:02:34,537 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 37 [2021-11-23 02:02:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-11-23 02:02:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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) [2021-11-23 02:02:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-11-23 02:02:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:02:34,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:34,540 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:34,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 02:02:34,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:02:34,758 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1552483179, now seen corresponding path program 2 times [2021-11-23 02:02:34,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934762772] [2021-11-23 02:02:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:34,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:35,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934762772] [2021-11-23 02:02:35,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934762772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94988443] [2021-11-23 02:02:35,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:02:35,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:35,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:35,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:02:35,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 02:02:35,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:02:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:02:35,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-23 02:02:36,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:02:36,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94988443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:36,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:02:36,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [34] total 36 [2021-11-23 02:02:36,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016793039] [2021-11-23 02:02:36,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:36,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:02:36,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:02:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:02:36,028 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-23 02:02:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:36,048 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-11-23 02:02:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:02:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 71 [2021-11-23 02:02:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:36,049 INFO L225 Difference]: With dead ends: 98 [2021-11-23 02:02:36,049 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 02:02:36,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:02:36,051 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:36,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-23 02:02:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 02:02:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-23 02:02:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 94 states have internal predecessors, (101), 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) [2021-11-23 02:02:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-11-23 02:02:36,056 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 71 [2021-11-23 02:02:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:36,056 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-11-23 02:02:36,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-23 02:02:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-11-23 02:02:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:02:36,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:36,058 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1] [2021-11-23 02:02:36,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:36,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:02:36,281 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:36,282 INFO L85 PathProgramCache]: Analyzing trace with hash -338702105, now seen corresponding path program 1 times [2021-11-23 02:02:36,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:36,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552661602] [2021-11-23 02:02:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:36,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:37,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552661602] [2021-11-23 02:02:37,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552661602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953181817] [2021-11-23 02:02:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:37,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:37,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:37,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:37,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:02:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:37,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:02:37,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:37,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:39,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953181817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738983226] [2021-11-23 02:02:39,257 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:02:39,257 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:39,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:39,258 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:39,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:02:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:39,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:39,449 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:02:39,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:02:39,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:39,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:39,796 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-11-23 02:02:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2021-11-23 02:02:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:40,101 INFO L354 Elim1Store]: treesize reduction 307, result has 19.6 percent of original size [2021-11-23 02:02:40,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 211 treesize of output 206 [2021-11-23 02:02:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:40,345 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:40,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:40,388 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:40,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:40,404 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:41,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4222#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset| 4)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:02:41,226 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:41,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:41,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2021-11-23 02:02:41,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886082797] [2021-11-23 02:02:41,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:41,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 02:02:41,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 02:02:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2364, Invalid=3186, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 02:02:41,232 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 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) [2021-11-23 02:02:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:44,507 INFO L93 Difference]: Finished difference Result 1191 states and 1258 transitions. [2021-11-23 02:02:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 02:02:44,507 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 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 74 [2021-11-23 02:02:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:44,514 INFO L225 Difference]: With dead ends: 1191 [2021-11-23 02:02:44,514 INFO L226 Difference]: Without dead ends: 1191 [2021-11-23 02:02:44,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2364, Invalid=3186, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 02:02:44,518 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3999 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3999 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:44,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3999 Valid, 603 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:02:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-23 02:02:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 163. [2021-11-23 02:02:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 162 states have internal predecessors, (169), 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) [2021-11-23 02:02:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2021-11-23 02:02:44,547 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 74 [2021-11-23 02:02:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:44,547 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2021-11-23 02:02:44,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 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) [2021-11-23 02:02:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2021-11-23 02:02:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 02:02:44,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:44,551 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 1, 1, 1, 1] [2021-11-23 02:02:44,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:44,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:02:44,765 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:02:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1203797835, now seen corresponding path program 2 times [2021-11-23 02:02:44,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:44,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764922625] [2021-11-23 02:02:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:44,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:02:47,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:47,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764922625] [2021-11-23 02:02:47,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764922625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:47,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200435219] [2021-11-23 02:02:47,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:02:47,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:47,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:47,050 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:47,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:02:47,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 02:02:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:02:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:02:47,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:47,137 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:02:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:02:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4357 trivial. 0 not checked. [2021-11-23 02:02:49,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4357 trivial. 0 not checked. [2021-11-23 02:02:51,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200435219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:51,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479479310] [2021-11-23 02:02:51,983 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:02:51,983 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:51,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:51,984 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:51,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:02:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:02:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,167 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:02:52,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 255 [2021-11-23 02:02:52,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:52,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:02:52,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:52,416 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-23 02:02:52,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2021-11-23 02:02:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:02:52,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:52,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:52,663 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-23 02:02:52,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-23 02:02:52,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:52,783 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:52,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:52,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:02:52,829 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:02:52,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:02:52,846 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:02:54,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6501#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset| 4)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:02:54,012 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:02:54,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:02:54,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 2, 2] total 72 [2021-11-23 02:02:54,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262799851] [2021-11-23 02:02:54,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:02:54,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 02:02:54,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 02:02:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2374, Invalid=3788, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 02:02:54,021 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand has 73 states, 73 states have (on average 2.232876712328767) internal successors, (163), 72 states have internal predecessors, (163), 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) [2021-11-23 02:03:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:09,508 INFO L93 Difference]: Finished difference Result 1081 states and 1211 transitions. [2021-11-23 02:03:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-11-23 02:03:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.232876712328767) internal successors, (163), 72 states have internal predecessors, (163), 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 142 [2021-11-23 02:03:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:09,518 INFO L225 Difference]: With dead ends: 1081 [2021-11-23 02:03:09,518 INFO L226 Difference]: Without dead ends: 1081 [2021-11-23 02:03:09,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 416 SyntacticMatches, 63 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11669 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=14235, Invalid=30921, Unknown=0, NotChecked=0, Total=45156 [2021-11-23 02:03:09,531 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5770 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5770 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:09,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5770 Valid, 408 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 751 Invalid, 0 Unknown, 33 Unchecked, 1.2s Time] [2021-11-23 02:03:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-23 02:03:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 164. [2021-11-23 02:03:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.05) internal successors, (168), 163 states have internal predecessors, (168), 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) [2021-11-23 02:03:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2021-11-23 02:03:09,552 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 142 [2021-11-23 02:03:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:09,553 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2021-11-23 02:03:09,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.232876712328767) internal successors, (163), 72 states have internal predecessors, (163), 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) [2021-11-23 02:03:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2021-11-23 02:03:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 02:03:09,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:09,556 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:09,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 02:03:09,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:03:09,784 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:03:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2094374519, now seen corresponding path program 1 times [2021-11-23 02:03:09,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:09,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606693056] [2021-11-23 02:03:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:09,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4489 trivial. 0 not checked. [2021-11-23 02:03:10,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:10,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606693056] [2021-11-23 02:03:10,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606693056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:03:10,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662084935] [2021-11-23 02:03:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:10,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:10,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:10,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:03:10,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:03:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-23 02:03:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:03:12,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:03:18,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662084935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:18,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664810056] [2021-11-23 02:03:18,352 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:03:18,352 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:03:18,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:03:18,352 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:03:18,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:03:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:03:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:03:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:03:18,488 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:03:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:03:18,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:03:18,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:03:18,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:03:18,675 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:03:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 02:03:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:03:18,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:03:18,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:03:18,764 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:03:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 113 [2021-11-23 02:03:18,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:03:18,813 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:03:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:03:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:03:18,840 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:03:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:03:18,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:03:19,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9090#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* 4 |ULTIMATE.start_main_~x~0#1|) 4)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:03:19,546 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:03:19,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:03:19,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 69, 69] total 141 [2021-11-23 02:03:19,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136116563] [2021-11-23 02:03:19,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:03:19,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-11-23 02:03:19,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-11-23 02:03:19,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9631, Invalid=12421, Unknown=0, NotChecked=0, Total=22052 [2021-11-23 02:03:19,556 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 142 states, 142 states have (on average 2.063380281690141) internal successors, (293), 141 states have internal predecessors, (293), 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) [2021-11-23 02:04:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:04,840 INFO L93 Difference]: Finished difference Result 3403 states and 3540 transitions. [2021-11-23 02:04:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2021-11-23 02:04:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.063380281690141) internal successors, (293), 141 states have internal predecessors, (293), 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 145 [2021-11-23 02:04:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:04,856 INFO L225 Difference]: With dead ends: 3403 [2021-11-23 02:04:04,856 INFO L226 Difference]: Without dead ends: 3403 [2021-11-23 02:04:04,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44066 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=56752, Invalid=119228, Unknown=0, NotChecked=0, Total=175980 [2021-11-23 02:04:04,871 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15561 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 1697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15561 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1697 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:04,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15561 Valid, 833 Invalid, 3364 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1697 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:04:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-11-23 02:04:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 304. [2021-11-23 02:04:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 300 states have (on average 1.0266666666666666) internal successors, (308), 303 states have internal predecessors, (308), 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) [2021-11-23 02:04:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 308 transitions. [2021-11-23 02:04:04,895 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 308 transitions. Word has length 145 [2021-11-23 02:04:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 308 transitions. [2021-11-23 02:04:04,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.063380281690141) internal successors, (293), 141 states have internal predecessors, (293), 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) [2021-11-23 02:04:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 308 transitions. [2021-11-23 02:04:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 02:04:04,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:04,900 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:04,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:05,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:04:05,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:04:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1345429381, now seen corresponding path program 1 times [2021-11-23 02:04:05,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:05,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718550809] [2021-11-23 02:04:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:05,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18498 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 18227 trivial. 0 not checked. [2021-11-23 02:04:05,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:05,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718550809] [2021-11-23 02:04:05,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718550809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761640223] [2021-11-23 02:04:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:05,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:05,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:05,384 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:05,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:04:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-23 02:04:05,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18498 backedges. 0 proven. 18496 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18498 backedges. 0 proven. 18496 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761640223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713833332] [2021-11-23 02:04:31,196 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 02:04:31,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:04:31,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:04:31,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:04:31,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:04:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:04:31,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:04:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:04:31,312 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:04:31,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 257 treesize of output 256 [2021-11-23 02:04:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:04:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:04:31,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:04:31,577 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-23 02:04:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2021-11-23 02:04:31,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:04:31,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:04:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:04:31,761 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-23 02:04:31,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-23 02:04:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:04:31,847 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:04:31,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:04:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:04:31,881 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:04:31,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:04:31,898 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:04:33,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15323#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* 4 |ULTIMATE.start_main_~x~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~x~0#1|) 4)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:04:33,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:04:33,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:04:33,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 138, 138] total 278 [2021-11-23 02:04:33,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559856316] [2021-11-23 02:04:33,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:04:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 279 states [2021-11-23 02:04:33,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 279 interpolants. [2021-11-23 02:04:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38266, Invalid=44390, Unknown=0, NotChecked=0, Total=82656 [2021-11-23 02:04:33,402 INFO L87 Difference]: Start difference. First operand 304 states and 308 transitions. Second operand has 279 states, 279 states have (on average 2.050179211469534) internal successors, (572), 278 states have internal predecessors, (572), 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) [2021-11-23 02:12:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:06,168 INFO L93 Difference]: Finished difference Result 6579 states and 6854 transitions. [2021-11-23 02:12:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 551 states. [2021-11-23 02:12:06,169 INFO L78 Accepts]: Start accepts. Automaton has has 279 states, 279 states have (on average 2.050179211469534) internal successors, (572), 278 states have internal predecessors, (572), 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 284 [2021-11-23 02:12:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:06,203 INFO L225 Difference]: With dead ends: 6579 [2021-11-23 02:12:06,204 INFO L226 Difference]: Without dead ends: 6579 [2021-11-23 02:12:06,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 833 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173592 ImplicationChecksByTransitivity, 88.8s TimeCoverageRelationStatistics Valid=227187, Invalid=469203, Unknown=0, NotChecked=0, Total=696390 [2021-11-23 02:12:06,255 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 35091 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 3325 mSolverCounterSat, 3278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35091 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 6603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3278 IncrementalHoareTripleChecker+Valid, 3325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:06,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35091 Valid, 1661 Invalid, 6603 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3278 Valid, 3325 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 02:12:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6579 states. [2021-11-23 02:12:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6579 to 581. [2021-11-23 02:12:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 577 states have (on average 1.0138648180242635) internal successors, (585), 580 states have internal predecessors, (585), 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) [2021-11-23 02:12:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 585 transitions. [2021-11-23 02:12:06,312 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 585 transitions. Word has length 284 [2021-11-23 02:12:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:06,313 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 585 transitions. [2021-11-23 02:12:06,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 279 states, 279 states have (on average 2.050179211469534) internal successors, (572), 278 states have internal predecessors, (572), 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) [2021-11-23 02:12:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 585 transitions. [2021-11-23 02:12:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-11-23 02:12:06,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:06,331 INFO L514 BasicCegarLoop]: trace histogram [274, 274, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:06,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:06,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:12:06,556 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 02:12:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash -796841242, now seen corresponding path program 1 times [2021-11-23 02:12:06,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745173372] [2021-11-23 02:12:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:06,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 75078 backedges. 0 proven. 75076 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:12:39,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745173372] [2021-11-23 02:12:39,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745173372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:39,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228892246] [2021-11-23 02:12:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:39,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:39,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:39,003 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:39,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73a4058-2b16-46b5-b094-32e060a5b7ef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:12:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 276 conjunts are in the unsatisfiable core [2021-11-23 02:12:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 75078 backedges. 0 proven. 75076 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:12:41,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 75078 backedges. 0 proven. 75076 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228892246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229062195] [2021-11-23 02:14:12,110 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-23 02:14:12,111 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:12,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:12,111 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:12,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 02:14:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:14:12,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:12,274 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:14:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 255 [2021-11-23 02:14:12,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:14:12,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:14:12,482 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-11-23 02:14:12,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2021-11-23 02:14:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:12,725 INFO L354 Elim1Store]: treesize reduction 307, result has 19.6 percent of original size [2021-11-23 02:14:12,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 210 treesize of output 205 [2021-11-23 02:14:12,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:12,868 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:14:12,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:14:12,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:12,906 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:14:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:14:12,938 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:16,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27505#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* 4 |ULTIMATE.start_main_~x~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~x~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:14:16,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:14:16,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:16,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [276, 276, 276] total 552 [2021-11-23 02:14:16,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709552947] [2021-11-23 02:14:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:16,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 553 states [2021-11-23 02:14:16,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 553 interpolants. [2021-11-23 02:14:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152667, Invalid=163739, Unknown=0, NotChecked=0, Total=316406 [2021-11-23 02:14:16,386 INFO L87 Difference]: Start difference. First operand 581 states and 585 transitions. Second operand has 553 states, 553 states have (on average 2.0144665461121156) internal successors, (1114), 552 states have internal predecessors, (1114), 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)