./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7 --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:52:43,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:52:43,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:52:43,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:52:43,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:52:43,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:52:43,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:52:43,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:52:43,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:52:43,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:52:43,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:52:43,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:52:43,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:52:43,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:52:43,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:52:43,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:52:43,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:52:43,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:52:43,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:52:43,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:52:43,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:52:43,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:52:43,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:52:43,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:52:43,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:52:43,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:52:43,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:52:43,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:52:43,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:52:43,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:52:43,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:52:43,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:52:43,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:52:43,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:52:43,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:52:43,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:52:43,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:52:43,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:52:43,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:52:43,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:52:43,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:52:43,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:52:43,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:52:43,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:52:43,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:52:43,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:52:43,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:52:43,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:52:43,574 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:52:43,575 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:52:43,575 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:52:43,575 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:52:43,576 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:52:43,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:52:43,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:52:43,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:52:43,577 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:52:43,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:52:43,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:52:43,578 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:52:43,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:52:43,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:52:43,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:52:43,580 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:52:43,580 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:52:43,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:52:43,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:52:43,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:52:43,583 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:52:43,583 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:52:43,583 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:52:43,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:52:43,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:52:43,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:52:43,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:52:43,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:52:43,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:52:43,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:52:43,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:52:43,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:52:43,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:52:43,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:52:43,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:52:43,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:52:43,587 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_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2021-11-25 19:52:43,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:52:43,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:52:43,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:52:43,863 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:52:43,864 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:52:43,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-25 19:52:43,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/data/6845b6922/6dd1649719a64af4b8f80dd5d61d1d37/FLAG17cc41189 [2021-11-25 19:52:44,402 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:52:44,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-25 19:52:44,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/data/6845b6922/6dd1649719a64af4b8f80dd5d61d1d37/FLAG17cc41189 [2021-11-25 19:52:44,782 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/data/6845b6922/6dd1649719a64af4b8f80dd5d61d1d37 [2021-11-25 19:52:44,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:52:44,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:52:44,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:52:44,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:52:44,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:52:44,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:52:44" (1/1) ... [2021-11-25 19:52:44,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b15f203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:44, skipping insertion in model container [2021-11-25 19:52:44,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:52:44" (1/1) ... [2021-11-25 19:52:44,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:52:44,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:52:44,979 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_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-25 19:52:45,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:52:45,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:52:45,030 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_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-25 19:52:45,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:52:45,060 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:52:45,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45 WrapperNode [2021-11-25 19:52:45,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:52:45,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:52:45,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:52:45,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:52:45,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,118 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2021-11-25 19:52:45,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:52:45,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:52:45,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:52:45,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:52:45,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:52:45,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:52:45,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:52:45,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:52:45,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (1/1) ... [2021-11-25 19:52:45,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:52:45,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:45,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:52:45,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:52:45,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:52:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:52:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:52:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:52:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:52:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:52:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:52:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:52:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:52:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 19:52:45,232 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 19:52:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:52:45,305 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:52:45,306 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:52:45,738 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:52:45,800 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:52:45,804 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-25 19:52:45,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:52:45 BoogieIcfgContainer [2021-11-25 19:52:45,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:52:45,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:52:45,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:52:45,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:52:45,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:52:44" (1/3) ... [2021-11-25 19:52:45,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c20614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:52:45, skipping insertion in model container [2021-11-25 19:52:45,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:52:45" (2/3) ... [2021-11-25 19:52:45,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c20614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:52:45, skipping insertion in model container [2021-11-25 19:52:45,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:52:45" (3/3) ... [2021-11-25 19:52:45,820 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2021-11-25 19:52:45,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:52:45,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-11-25 19:52:45,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:52:45,893 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 [2021-11-25 19:52:45,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-11-25 19:52:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:52:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:52:45,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:45,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:45,941 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -400663964, now seen corresponding path program 1 times [2021-11-25 19:52:45,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:45,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380737855] [2021-11-25 19:52:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:45,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:52:46,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:46,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380737855] [2021-11-25 19:52:46,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380737855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:46,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:46,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:46,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755900897] [2021-11-25 19:52:46,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:46,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:52:46,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:52:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:52:46,264 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:46,419 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-11-25 19:52:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:52:46,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2021-11-25 19:52:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:46,431 INFO L225 Difference]: With dead ends: 76 [2021-11-25 19:52:46,431 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 19:52:46,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:46,437 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:46,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 63 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:52:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 19:52:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-25 19:52:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:52:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-11-25 19:52:46,487 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2021-11-25 19:52:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:46,494 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-11-25 19:52:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2021-11-25 19:52:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:52:46,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:46,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:46,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:52:46,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash -400663963, now seen corresponding path program 1 times [2021-11-25 19:52:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:46,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965983200] [2021-11-25 19:52:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:46,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:52:46,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965983200] [2021-11-25 19:52:46,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965983200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:46,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:46,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:52:46,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621332231] [2021-11-25 19:52:46,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:46,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:52:46,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:52:46,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:52:46,762 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:47,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:47,035 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-25 19:52:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:52:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2021-11-25 19:52:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:47,042 INFO L225 Difference]: With dead ends: 133 [2021-11-25 19:52:47,045 INFO L226 Difference]: Without dead ends: 133 [2021-11-25 19:52:47,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:52:47,048 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 324 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:47,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 112 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:52:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-25 19:52:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2021-11-25 19:52:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 69 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:52:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-25 19:52:47,072 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2021-11-25 19:52:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:47,080 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-25 19:52:47,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-25 19:52:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:52:47,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:47,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:47,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:52:47,083 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 464319011, now seen corresponding path program 1 times [2021-11-25 19:52:47,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:47,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788858546] [2021-11-25 19:52:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:47,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:52:47,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:47,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788858546] [2021-11-25 19:52:47,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788858546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:47,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:47,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:52:47,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768857853] [2021-11-25 19:52:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:47,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:52:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:52:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:52:47,196 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:52:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:47,289 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-25 19:52:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:52:47,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2021-11-25 19:52:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:47,291 INFO L225 Difference]: With dead ends: 75 [2021-11-25 19:52:47,291 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 19:52:47,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:47,293 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:47,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:52:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 19:52:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-25 19:52:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 68 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:52:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-25 19:52:47,301 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 21 [2021-11-25 19:52:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-25 19:52:47,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:52:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-25 19:52:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:52:47,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:47,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:47,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:52:47,304 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash 464319012, now seen corresponding path program 1 times [2021-11-25 19:52:47,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650747308] [2021-11-25 19:52:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:47,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:52:47,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650747308] [2021-11-25 19:52:47,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650747308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:47,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:47,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:47,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670506839] [2021-11-25 19:52:47,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:47,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:47,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:47,455 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:52:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:47,679 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2021-11-25 19:52:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:47,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2021-11-25 19:52:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:47,682 INFO L225 Difference]: With dead ends: 129 [2021-11-25 19:52:47,682 INFO L226 Difference]: Without dead ends: 129 [2021-11-25 19:52:47,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:47,683 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:47,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 110 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:52:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-25 19:52:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2021-11-25 19:52:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 2.064516129032258) internal successors, (128), 91 states have internal predecessors, (128), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:52:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 136 transitions. [2021-11-25 19:52:47,704 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 136 transitions. Word has length 21 [2021-11-25 19:52:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:47,705 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 136 transitions. [2021-11-25 19:52:47,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:52:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 136 transitions. [2021-11-25 19:52:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:52:47,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:47,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:47,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:52:47,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:47,709 INFO L85 PathProgramCache]: Analyzing trace with hash 464496812, now seen corresponding path program 1 times [2021-11-25 19:52:47,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:47,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999489056] [2021-11-25 19:52:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:47,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:52:47,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:47,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999489056] [2021-11-25 19:52:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999489056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:47,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:47,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:52:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75165371] [2021-11-25 19:52:47,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:52:47,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:52:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:52:47,799 INFO L87 Difference]: Start difference. First operand 98 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:47,923 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2021-11-25 19:52:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:52:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2021-11-25 19:52:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:47,925 INFO L225 Difference]: With dead ends: 92 [2021-11-25 19:52:47,925 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 19:52:47,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:52:47,929 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:47,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 74 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:52:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 19:52:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-25 19:52:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 85 states have internal predecessors, (116), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:52:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2021-11-25 19:52:47,950 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 21 [2021-11-25 19:52:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:47,950 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2021-11-25 19:52:47,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2021-11-25 19:52:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:52:47,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:47,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:47,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:52:47,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash 464496813, now seen corresponding path program 1 times [2021-11-25 19:52:47,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:47,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232503115] [2021-11-25 19:52:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:47,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:52:48,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232503115] [2021-11-25 19:52:48,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232503115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:48,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:52:48,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:52:48,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116869803] [2021-11-25 19:52:48,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:48,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:52:48,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:52:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:52:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:52:48,125 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:50,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:52:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:50,657 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2021-11-25 19:52:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:52:50,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2021-11-25 19:52:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:50,659 INFO L225 Difference]: With dead ends: 155 [2021-11-25 19:52:50,659 INFO L226 Difference]: Without dead ends: 155 [2021-11-25 19:52:50,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:52:50,660 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 187 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:50,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 434 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:52:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-25 19:52:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 100. [2021-11-25 19:52:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 90 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:52:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2021-11-25 19:52:50,668 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 21 [2021-11-25 19:52:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:50,668 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2021-11-25 19:52:50,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:52:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2021-11-25 19:52:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:52:50,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:50,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:50,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:52:50,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-25 19:52:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash 770091686, now seen corresponding path program 1 times [2021-11-25 19:52:50,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:52:50,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209151420] [2021-11-25 19:52:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:50,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:52:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:52:50,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:52:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209151420] [2021-11-25 19:52:50,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209151420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827807054] [2021-11-25 19:52:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:50,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:50,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:52:50,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa85eee4-4bc8-4e8d-b6c0-7964a7bea00c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process