./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 950fd5ff5cc9d2c5e3d846192e43f4963ef3abd0ec7056eb5d764989d48b2064 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:31:16,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:31:16,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:31:16,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:31:16,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:31:16,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:31:16,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:31:16,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:31:16,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:31:16,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:31:16,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:31:16,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:31:16,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:31:16,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:31:16,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:31:16,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:31:16,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:31:16,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:31:16,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:31:16,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:31:16,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:31:16,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:31:16,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:31:16,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:31:16,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:31:16,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:31:16,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:31:16,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:31:16,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:31:16,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:31:16,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:31:16,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:31:16,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:31:16,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:31:16,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:31:16,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:31:16,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:31:16,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:31:16,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:31:16,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:31:16,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:31:16,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:31:16,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:31:16,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:31:16,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:31:16,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:31:16,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:31:16,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:31:16,597 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:31:16,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:31:16,598 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:31:16,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:31:16,599 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:31:16,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:31:16,599 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:31:16,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:31:16,600 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:31:16,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:31:16,601 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:31:16,601 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:31:16,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:31:16,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:31:16,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:31:16,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:31:16,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:31:16,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:31:16,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:31:16,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:31:16,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:31:16,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:31:16,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:31:16,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:31:16,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:31:16,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:31:16,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:31:16,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:31:16,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:31:16,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:31:16,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:31:16,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:31:16,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:31:16,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:31:16,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:31:16,611 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_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 950fd5ff5cc9d2c5e3d846192e43f4963ef3abd0ec7056eb5d764989d48b2064 [2021-11-21 01:31:16,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:31:16,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:31:16,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:31:16,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:31:16,965 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:31:16,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/sqm.c [2021-11-21 01:31:17,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/data/2db6d21d3/0bf0af4bbf9b45288ed48b7d9f858095/FLAG0330bb17f [2021-11-21 01:31:17,635 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:31:17,636 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/sv-benchmarks/c/array-fpi/sqm.c [2021-11-21 01:31:17,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/data/2db6d21d3/0bf0af4bbf9b45288ed48b7d9f858095/FLAG0330bb17f [2021-11-21 01:31:18,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/data/2db6d21d3/0bf0af4bbf9b45288ed48b7d9f858095 [2021-11-21 01:31:18,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:31:18,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:31:18,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:31:18,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:31:18,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:31:18,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d142f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18, skipping insertion in model container [2021-11-21 01:31:18,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:31:18,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:31:18,262 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_4677cb93-3564-4a17-b957-5e0c59082a59/sv-benchmarks/c/array-fpi/sqm.c[586,599] [2021-11-21 01:31:18,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:31:18,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:31:18,306 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_4677cb93-3564-4a17-b957-5e0c59082a59/sv-benchmarks/c/array-fpi/sqm.c[586,599] [2021-11-21 01:31:18,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:31:18,333 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:31:18,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18 WrapperNode [2021-11-21 01:31:18,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:31:18,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:31:18,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:31:18,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:31:18,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,400 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-21 01:31:18,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:31:18,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:31:18,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:31:18,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:31:18,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:31:18,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:31:18,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:31:18,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:31:18,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (1/1) ... [2021-11-21 01:31:18,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:31:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:18,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:31:18,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:31:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:31:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:31:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:31:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:31:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:31:18,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:31:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:31:18,640 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:31:18,643 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:31:18,907 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:31:18,947 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:31:18,948 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:31:18,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:31:18 BoogieIcfgContainer [2021-11-21 01:31:18,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:31:18,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:31:18,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:31:18,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:31:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:31:18" (1/3) ... [2021-11-21 01:31:18,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3703b190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:31:18, skipping insertion in model container [2021-11-21 01:31:18,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:18" (2/3) ... [2021-11-21 01:31:18,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3703b190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:31:18, skipping insertion in model container [2021-11-21 01:31:18,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:31:18" (3/3) ... [2021-11-21 01:31:18,985 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm.c [2021-11-21 01:31:18,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:31:18,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:31:19,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:31:19,092 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-21 01:31:19,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:31:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-11-21 01:31:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:31:19,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:19,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:19,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash -735732333, now seen corresponding path program 1 times [2021-11-21 01:31:19,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:19,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509764895] [2021-11-21 01:31:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:19,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:19,249 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:19,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033004677] [2021-11-21 01:31:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:19,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:19,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:19,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:31:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:19,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:31:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:19,501 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 01:31:19,503 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 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:31:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:19,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:31:19,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:19,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509764895] [2021-11-21 01:31:19,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:19,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033004677] [2021-11-21 01:31:19,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033004677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:19,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:19,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:31:19,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787897310] [2021-11-21 01:31:19,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:19,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:31:19,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:19,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:31:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:31:19,823 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:19,993 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-21 01:31:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:31:19,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:31:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:20,006 INFO L225 Difference]: With dead ends: 35 [2021-11-21 01:31:20,006 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 01:31:20,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:31:20,014 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:20,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:31:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 01:31:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2021-11-21 01:31:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2021-11-21 01:31:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-11-21 01:31:20,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2021-11-21 01:31:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:20,060 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-21 01:31:20,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:31:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-11-21 01:31:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:31:20,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:20,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:20,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:20,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:20,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1337635293, now seen corresponding path program 1 times [2021-11-21 01:31:20,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:20,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352687415] [2021-11-21 01:31:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:20,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:20,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295863055] [2021-11-21 01:31:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:20,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:20,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:20,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:20,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:31:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:31:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:20,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:31:20,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352687415] [2021-11-21 01:31:20,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295863055] [2021-11-21 01:31:20,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295863055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:20,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:20,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:31:20,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298403146] [2021-11-21 01:31:20,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:20,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:31:20,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:31:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:31:20,526 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-21 01:31:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:20,614 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-11-21 01:31:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:31:20,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 8 [2021-11-21 01:31:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:20,619 INFO L225 Difference]: With dead ends: 25 [2021-11-21 01:31:20,619 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 01:31:20,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:31:20,622 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:20,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:31:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 01:31:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2021-11-21 01:31:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-21 01:31:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-21 01:31:20,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-11-21 01:31:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:20,630 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-21 01:31:20,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-21 01:31:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-21 01:31:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:31:20,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:20,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:20,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:20,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 01:31:20,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1611921030, now seen corresponding path program 1 times [2021-11-21 01:31:20,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099994570] [2021-11-21 01:31:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:20,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:20,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:20,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68155731] [2021-11-21 01:31:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:20,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:20,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:20,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:31:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:31:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:21,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:31:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:31:21,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:21,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099994570] [2021-11-21 01:31:21,084 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:21,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68155731] [2021-11-21 01:31:21,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68155731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:31:21,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914026607] [2021-11-21 01:31:21,108 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:31:21,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:31:21,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:31:21,118 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:31:21,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:31:21,521 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-21 01:31:21,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-21 01:31:21,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2021-11-21 01:31:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-21 01:31:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 112 [2021-11-21 01:31:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:22,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:22,771 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-11-21 01:31:22,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 13 select indices, 13 select index equivalence classes, 51 disjoint index pairs (out of 78 index pairs), introduced 17 new quantified variables, introduced 52 case distinctions, treesize of input 572 treesize of output 850 [2021-11-21 01:31:24,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:25,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:27,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:27,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:27,339 INFO L354 Elim1Store]: treesize reduction 134, result has 0.7 percent of original size [2021-11-21 01:31:27,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 44 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 55 case distinctions, treesize of input 664 treesize of output 516 [2021-11-21 01:31:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:28,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,290 INFO L354 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2021-11-21 01:31:28,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 35 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 579 treesize of output 438 [2021-11-21 01:31:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:29,018 INFO L354 Elim1Store]: treesize reduction 121, result has 10.4 percent of original size [2021-11-21 01:31:29,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 44 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 55 case distinctions, treesize of input 515 treesize of output 413 [2021-11-21 01:31:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-21 01:31:30,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:30,555 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:31:30,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:31:30,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:31:30,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-21 01:31:30,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762956115] [2021-11-21 01:31:30,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:31:30,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:31:30,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:31:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:31:30,898 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-21 01:31:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:31,009 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-21 01:31:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:31:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 8 [2021-11-21 01:31:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:31,011 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:31:31,012 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 01:31:31,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:31:31,014 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:31,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:31:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 01:31:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2021-11-21 01:31:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-11-21 01:31:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-21 01:31:31,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-21 01:31:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:31,022 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-21 01:31:31,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-21 01:31:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-21 01:31:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:31:31,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:31,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:31,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:31,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:31,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:31,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1565286172, now seen corresponding path program 1 times [2021-11-21 01:31:31,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:31,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805493857] [2021-11-21 01:31:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:31,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:31,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:31,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21682174] [2021-11-21 01:31:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:31,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:31,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:31,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4677cb93-3564-4a17-b957-5e0c59082a59/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:31:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:31:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:31,397 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 10 treesize of output 8 [2021-11-21 01:31:31,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:31:31,667 INFO L354 Elim1Store]: treesize reduction 618, result has 21.5 percent of original size [2021-11-21 01:31:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 190 treesize of output 324 [2021-11-21 01:31:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:31,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 63 [2021-11-21 01:31:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:31,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 63 [2021-11-21 01:31:31,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:32,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 56 [2021-11-21 01:31:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,242 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-21 01:31:32,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 63 [2021-11-21 01:31:32,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 63 [2021-11-21 01:31:32,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:32,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 63 [2021-11-21 01:31:33,693 INFO L354 Elim1Store]: treesize reduction 117, result has 0.8 percent of original size [2021-11-21 01:31:33,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 133 [2021-11-21 01:31:34,679 INFO L354 Elim1Store]: treesize reduction 280, result has 33.5 percent of original size [2021-11-21 01:31:34,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 377 treesize of output 368