./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta --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 d9e382438d8fbe8dfce0f613a239dc56836f436a035cb511dde070c4306eb1f9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:38:54,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:38:54,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:38:54,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:38:54,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:38:54,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:38:54,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:38:54,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:38:54,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:38:54,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:38:54,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:38:54,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:38:54,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:38:54,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:38:54,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:38:54,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:38:54,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:38:54,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:38:54,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:38:54,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:38:54,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:38:54,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:38:54,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:38:54,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:38:54,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:38:54,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:38:54,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:38:54,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:38:54,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:38:54,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:38:54,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:38:54,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:38:54,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:38:54,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:38:54,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:38:54,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:38:54,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:38:54,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:38:54,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:38:54,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:38:54,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:38:54,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:38:54,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:38:54,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:38:54,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:38:54,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:38:54,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:38:54,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:38:54,565 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:38:54,566 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:38:54,566 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:38:54,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:38:54,566 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:38:54,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:38:54,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:38:54,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:38:54,568 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:38:54,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:38:54,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:38:54,568 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:38:54,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:38:54,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:38:54,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:38:54,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:38:54,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:38:54,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:38:54,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:38:54,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:38:54,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:38:54,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:38:54,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:38:54,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:38:54,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:38:54,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:38:54,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:54,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:38:54,574 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:38:54,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:38:54,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:38:54,575 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:38:54,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:38:54,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:38:54,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:38:54,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9e382438d8fbe8dfce0f613a239dc56836f436a035cb511dde070c4306eb1f9 [2022-10-17 17:38:54,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:38:54,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:38:54,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:38:54,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:38:54,937 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:38:54,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-multidimensional/copy-2-u.c [2022-10-17 17:38:55,034 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/data/2c2413261/21c1cd5c03e149f28de1de4b513a121d/FLAG451d85621 [2022-10-17 17:38:55,607 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:55,607 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/sv-benchmarks/c/array-multidimensional/copy-2-u.c [2022-10-17 17:38:55,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/data/2c2413261/21c1cd5c03e149f28de1de4b513a121d/FLAG451d85621 [2022-10-17 17:38:55,929 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/data/2c2413261/21c1cd5c03e149f28de1de4b513a121d [2022-10-17 17:38:55,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:55,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:55,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:55,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:55,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:55,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:55" (1/1) ... [2022-10-17 17:38:55,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a418f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:55, skipping insertion in model container [2022-10-17 17:38:55,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:55" (1/1) ... [2022-10-17 17:38:55,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:55,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:56,198 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_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2022-10-17 17:38:56,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:56,232 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:56,246 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_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2022-10-17 17:38:56,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:56,274 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:56,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56 WrapperNode [2022-10-17 17:38:56,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:56,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:56,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:56,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:56,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,315 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-10-17 17:38:56,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:56,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:56,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:56,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:56,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,345 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:56,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:56,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:56,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:56,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (1/1) ... [2022-10-17 17:38:56,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:56,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:56,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:38:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:56,523 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:56,525 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:56,695 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:56,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:56,741 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 17:38:56,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:56 BoogieIcfgContainer [2022-10-17 17:38:56,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:56,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:56,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:56,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:56,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:55" (1/3) ... [2022-10-17 17:38:56,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ee47be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:56, skipping insertion in model container [2022-10-17 17:38:56,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:56" (2/3) ... [2022-10-17 17:38:56,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ee47be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:56, skipping insertion in model container [2022-10-17 17:38:56,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:56" (3/3) ... [2022-10-17 17:38:56,756 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2022-10-17 17:38:56,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:56,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:56,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:56,845 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@252dba3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:56,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 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) [2022-10-17 17:38:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:38:56,858 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:56,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:56,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:56,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1209143189, now seen corresponding path program 1 times [2022-10-17 17:38:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:56,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060640558] [2022-10-17 17:38:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:56,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:57,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:38:57,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125492628] [2022-10-17 17:38:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:57,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:57,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:57,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:57,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:38:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:57,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:57,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:57,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060640558] [2022-10-17 17:38:57,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:38:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125492628] [2022-10-17 17:38:57,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125492628] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:57,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:57,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:57,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854982395] [2022-10-17 17:38:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:57,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:57,376 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-10-17 17:38:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:57,467 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-10-17 17:38:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2022-10-17 17:38:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:57,481 INFO L225 Difference]: With dead ends: 23 [2022-10-17 17:38:57,481 INFO L226 Difference]: Without dead ends: 13 [2022-10-17 17:38:57,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:57,494 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:57,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-10-17 17:38:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-10-17 17:38:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-10-17 17:38:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-10-17 17:38:57,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-10-17 17:38:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:57,549 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-10-17 17:38:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-10-17 17:38:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-10-17 17:38:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:38:57,554 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:57,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:57,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:57,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:38:57,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash 993204907, now seen corresponding path program 1 times [2022-10-17 17:38:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:57,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118178968] [2022-10-17 17:38:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:57,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:57,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:38:57,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016344506] [2022-10-17 17:38:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:57,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:57,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:57,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:57,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:38:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:57,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:38:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:57,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:57,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:57,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118178968] [2022-10-17 17:38:57,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:38:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016344506] [2022-10-17 17:38:57,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016344506] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:57,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:57,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204497839] [2022-10-17 17:38:57,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:57,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:57,972 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:58,058 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-10-17 17:38:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:38:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:38:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:58,060 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:38:58,060 INFO L226 Difference]: Without dead ends: 21 [2022-10-17 17:38:58,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:58,063 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:58,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-10-17 17:38:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-10-17 17:38:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-10-17 17:38:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-10-17 17:38:58,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-10-17 17:38:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:58,072 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-10-17 17:38:58,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:38:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-10-17 17:38:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:38:58,073 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:58,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:58,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:58,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:58,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2088403375, now seen corresponding path program 1 times [2022-10-17 17:38:58,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:58,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678562064] [2022-10-17 17:38:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:58,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:58,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:38:58,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604446586] [2022-10-17 17:38:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:58,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:58,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:58,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:38:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:38:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:58,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:58,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678562064] [2022-10-17 17:38:58,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:38:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604446586] [2022-10-17 17:38:58,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604446586] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:58,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012860925] [2022-10-17 17:38:58,596 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:38:58,596 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:58,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:58,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:58,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:58,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:58,876 INFO L356 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-10-17 17:38:58,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-10-17 17:38:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:59,039 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:38:59,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:38:59,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:59,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-10-17 17:38:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:59,793 INFO L356 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-10-17 17:38:59,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 337 treesize of output 320 [2022-10-17 17:39:00,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:00,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:00,276 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:00,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1012860925] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:00,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:39:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-10-17 17:39:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415318932] [2022-10-17 17:39:00,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:00,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:39:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:39:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:39:00,685 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-10-17 17:39:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:01,030 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-10-17 17:39:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:39:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 10 [2022-10-17 17:39:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:01,032 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:39:01,032 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 17:39:01,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:39:01,046 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:01,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 17:39:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-10-17 17:39:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-10-17 17:39:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-10-17 17:39:01,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-10-17 17:39:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:01,072 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-10-17 17:39:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-10-17 17:39:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-10-17 17:39:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:39:01,073 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:01,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:01,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:01,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:01,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash 280877451, now seen corresponding path program 1 times [2022-10-17 17:39:01,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999008937] [2022-10-17 17:39:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:01,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:39:01,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482253069] [2022-10-17 17:39:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:01,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:01,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:01,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:01,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:39:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:39:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:01,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:01,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:01,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999008937] [2022-10-17 17:39:01,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:39:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482253069] [2022-10-17 17:39:01,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482253069] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346268134] [2022-10-17 17:39:01,499 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-10-17 17:39:01,500 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:01,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:01,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:01,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:01,639 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:39:01,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:39:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:01,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-10-17 17:39:01,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:01,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-10-17 17:39:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:02,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:02,130 INFO L356 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-10-17 17:39:02,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 329 treesize of output 322 [2022-10-17 17:39:02,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:02,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:02,591 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-10-17 17:39:02,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-10-17 17:39:02,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:02,756 INFO L356 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-10-17 17:39:02,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 129 [2022-10-17 17:39:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:02,950 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:02,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:03,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:03,030 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:03,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:03,108 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:03,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-10-17 17:39:03,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:39:03,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:39:03,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-10-17 17:39:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293647675] [2022-10-17 17:39:03,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:39:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:39:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:39:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:39:03,463 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2022-10-17 17:39:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:03,607 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-10-17 17:39:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:39:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) Word has length 13 [2022-10-17 17:39:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:03,612 INFO L225 Difference]: With dead ends: 52 [2022-10-17 17:39:03,612 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 17:39:03,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:39:03,616 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:03,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 17:39:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-10-17 17:39:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:39:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-10-17 17:39:03,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-10-17 17:39:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:03,647 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-10-17 17:39:03,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2022-10-17 17:39:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-10-17 17:39:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:39:03,649 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:03,649 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:03,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:03,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-17 17:39:03,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:03,877 INFO L85 PathProgramCache]: Analyzing trace with hash -406304509, now seen corresponding path program 2 times [2022-10-17 17:39:03,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:03,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171140979] [2022-10-17 17:39:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:03,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:03,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:39:03,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464016213] [2022-10-17 17:39:03,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:39:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:03,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:03,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:39:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:39:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:39:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:39:03,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:39:04,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:39:04,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171140979] [2022-10-17 17:39:04,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:39:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464016213] [2022-10-17 17:39:04,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464016213] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393900860] [2022-10-17 17:39:04,089 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-10-17 17:39:04,090 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:04,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:04,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:04,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,167 INFO L356 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-10-17 17:39:04,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-10-17 17:39:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,259 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:39:04,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:39:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-10-17 17:39:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:04,633 INFO L356 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-10-17 17:39:04,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 337 treesize of output 320 [2022-10-17 17:39:04,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:04,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:04,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:04,925 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-10-17 17:39:04,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-10-17 17:39:05,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:05,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:05,081 INFO L356 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-10-17 17:39:05,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 129 [2022-10-17 17:39:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:05,191 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:05,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:05,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:05,267 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:05,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:05,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:05,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '691#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-10-17 17:39:05,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:39:05,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:39:05,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-10-17 17:39:05,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466698675] [2022-10-17 17:39:05,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:39:05,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:05,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:39:05,896 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-10-17 17:39:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:05,996 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-10-17 17:39:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:39:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-17 17:39:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:06,001 INFO L225 Difference]: With dead ends: 72 [2022-10-17 17:39:06,001 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 17:39:06,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:39:06,003 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:06,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 17:39:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-10-17 17:39:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2022-10-17 17:39:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-10-17 17:39:06,039 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-10-17 17:39:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:06,040 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-10-17 17:39:06,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-10-17 17:39:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-10-17 17:39:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 17:39:06,042 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:06,042 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:06,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-17 17:39:06,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:06,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2101584963, now seen corresponding path program 3 times [2022-10-17 17:39:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:06,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155346105] [2022-10-17 17:39:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:06,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:06,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:39:06,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914847744] [2022-10-17 17:39:06,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:39:06,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:06,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:06,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:39:06,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:39:06,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:39:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:39:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-10-17 17:39:06,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-10-17 17:39:06,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:06,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155346105] [2022-10-17 17:39:06,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:39:06,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914847744] [2022-10-17 17:39:06,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914847744] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:06,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304130037] [2022-10-17 17:39:06,521 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-10-17 17:39:06,521 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:06,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:06,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:06,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,609 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:39:06,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:39:06,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-10-17 17:39:06,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-10-17 17:39:06,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:06,953 INFO L356 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-10-17 17:39:06,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 337 treesize of output 320 [2022-10-17 17:39:07,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:07,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:07,246 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:07,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:07,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:07,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:07,343 INFO L356 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-10-17 17:39:07,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 123 [2022-10-17 17:39:07,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:07,407 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:07,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:07,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:07,455 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:07,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:07,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:08,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1150#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-10-17 17:39:08,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:39:08,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:39:08,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-10-17 17:39:08,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436311160] [2022-10-17 17:39:08,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:39:08,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 17:39:08,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 17:39:08,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-10-17 17:39:08,229 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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) [2022-10-17 17:39:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:08,791 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-10-17 17:39:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 17:39:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-17 17:39:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:08,793 INFO L225 Difference]: With dead ends: 148 [2022-10-17 17:39:08,793 INFO L226 Difference]: Without dead ends: 132 [2022-10-17 17:39:08,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2022-10-17 17:39:08,795 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:08,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 91 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:39:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-10-17 17:39:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2022-10-17 17:39:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 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) [2022-10-17 17:39:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-10-17 17:39:08,826 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2022-10-17 17:39:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:08,827 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-10-17 17:39:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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) [2022-10-17 17:39:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-10-17 17:39:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 17:39:08,829 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:08,829 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:08,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:09,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:09,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1621711157, now seen corresponding path program 4 times [2022-10-17 17:39:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:09,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444926204] [2022-10-17 17:39:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:09,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:39:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466854076] [2022-10-17 17:39:09,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:39:09,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:09,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:09,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:39:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:39:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-10-17 17:39:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-10-17 17:39:09,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444926204] [2022-10-17 17:39:09,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:39:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466854076] [2022-10-17 17:39:09,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466854076] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204192454] [2022-10-17 17:39:09,338 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-10-17 17:39:09,338 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:09,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:09,339 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:09,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:09,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:09,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:09,404 INFO L356 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-10-17 17:39:09,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-10-17 17:39:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:09,480 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-10-17 17:39:09,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-10-17 17:39:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:09,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-10-17 17:39:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:39:09,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:09,774 INFO L356 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-10-17 17:39:09,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 329 treesize of output 322 [2022-10-17 17:39:09,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:09,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-10-17 17:39:10,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:10,061 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-10-17 17:39:10,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-10-17 17:39:10,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:10,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:10,177 INFO L356 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-10-17 17:39:10,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 129 [2022-10-17 17:39:10,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:10,299 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:10,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:10,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:39:10,349 INFO L356 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-10-17 17:39:10,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-10-17 17:39:10,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:11,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1913#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-10-17 17:39:11,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:39:11,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:39:11,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-10-17 17:39:11,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009077589] [2022-10-17 17:39:11,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:39:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:39:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:39:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=173, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:39:11,120 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-10-17 17:39:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:11,415 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2022-10-17 17:39:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 17:39:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 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 55 [2022-10-17 17:39:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:11,418 INFO L225 Difference]: With dead ends: 212 [2022-10-17 17:39:11,419 INFO L226 Difference]: Without dead ends: 152 [2022-10-17 17:39:11,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 106 SyntacticMatches, 41 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:39:11,422 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:11,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 30 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-10-17 17:39:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2022-10-17 17:39:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 132 states have internal predecessors, (153), 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) [2022-10-17 17:39:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2022-10-17 17:39:11,498 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2022-10-17 17:39:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:11,498 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2022-10-17 17:39:11,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-10-17 17:39:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2022-10-17 17:39:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-17 17:39:11,506 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:11,506 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:11,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:11,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:11,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1833412405, now seen corresponding path program 5 times [2022-10-17 17:39:11,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383253721] [2022-10-17 17:39:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:11,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:11,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:39:11,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915465667] [2022-10-17 17:39:11,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:39:11,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:11,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:11,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48e5f298-04a6-4ff9-a2e3-69230c5ffec6/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process