./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/transpose-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/transpose-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:47:04,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:47:04,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:47:04,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:47:04,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:47:04,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:47:04,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:47:04,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:47:04,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:47:04,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:47:04,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:47:04,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:47:04,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:47:04,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:47:04,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:47:04,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:47:04,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:47:04,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:47:04,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:47:04,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:47:04,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:47:04,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:47:04,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:47:04,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:47:04,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:47:04,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:47:04,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:47:04,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:47:04,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:47:04,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:47:04,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:47:04,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:47:04,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:47:04,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:47:04,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:47:04,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:47:04,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:47:04,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:47:04,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:47:04,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:47:04,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:47:04,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:47:04,539 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:47:04,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:47:04,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:47:04,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:47:04,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:47:04,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:47:04,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:47:04,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:47:04,542 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:47:04,542 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:47:04,542 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:47:04,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:47:04,543 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:47:04,543 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:47:04,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:47:04,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:47:04,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:47:04,544 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:47:04,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:47:04,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:47:04,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:47:04,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:47:04,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:47:04,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:47:04,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:47:04,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:47:04,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:47:04,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:47:04,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:47:04,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:47:04,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:47:04,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:47:04,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:47:04,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:47:04,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:47:04,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:47:04,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:47:04,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:47:04,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:47:04,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:47:04,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:47:04,551 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 [2021-11-21 01:47:04,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:47:04,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:47:04,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:47:04,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:47:04,859 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:47:04,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-multidimensional/transpose-u.c [2021-11-21 01:47:04,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/data/6df3eb77a/d04aba89a5b54352b60137e98c93b37d/FLAG8d92e8259 [2021-11-21 01:47:05,382 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:47:05,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/sv-benchmarks/c/array-multidimensional/transpose-u.c [2021-11-21 01:47:05,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/data/6df3eb77a/d04aba89a5b54352b60137e98c93b37d/FLAG8d92e8259 [2021-11-21 01:47:05,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/data/6df3eb77a/d04aba89a5b54352b60137e98c93b37d [2021-11-21 01:47:05,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:47:05,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:47:05,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:47:05,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:47:05,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:47:05,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:05" (1/1) ... [2021-11-21 01:47:05,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b43a48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:05, skipping insertion in model container [2021-11-21 01:47:05,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:05" (1/1) ... [2021-11-21 01:47:05,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:47:05,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:47:05,970 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_41504e05-7ec6-4c8c-96be-e1155719e9cc/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2021-11-21 01:47:06,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:47:06,016 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:47:06,026 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_41504e05-7ec6-4c8c-96be-e1155719e9cc/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2021-11-21 01:47:06,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:47:06,050 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:47:06,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06 WrapperNode [2021-11-21 01:47:06,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:47:06,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:47:06,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:47:06,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:47:06,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,091 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2021-11-21 01:47:06,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:47:06,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:47:06,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:47:06,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:47:06,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:47:06,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:47:06,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:47:06,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:47:06,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (1/1) ... [2021-11-21 01:47:06,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:47:06,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:06,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:47:06,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:47:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:47:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:47:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:47:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:47:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:47:06,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:47:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:47:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:47:06,273 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:47:06,275 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:47:06,408 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:47:06,442 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:47:06,442 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 01:47:06,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:06 BoogieIcfgContainer [2021-11-21 01:47:06,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:47:06,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:47:06,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:47:06,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:47:06,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:47:05" (1/3) ... [2021-11-21 01:47:06,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652ceb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:06, skipping insertion in model container [2021-11-21 01:47:06,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:06" (2/3) ... [2021-11-21 01:47:06,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652ceb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:06, skipping insertion in model container [2021-11-21 01:47:06,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:06" (3/3) ... [2021-11-21 01:47:06,453 INFO L111 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2021-11-21 01:47:06,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:47:06,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:47:06,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:47:06,530 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:47:06,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:47:06,545 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) [2021-11-21 01:47:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:47:06,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:06,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:06,551 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash 772701100, now seen corresponding path program 1 times [2021-11-21 01:47:06,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:06,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028168664] [2021-11-21 01:47:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:06,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:06,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279382536] [2021-11-21 01:47:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:06,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:06,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:06,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:47:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:06,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:47:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:06,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:06,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028168664] [2021-11-21 01:47:06,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279382536] [2021-11-21 01:47:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279382536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:06,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:06,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:47:06,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485234793] [2021-11-21 01:47:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:06,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:47:06,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:47:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:47:06,955 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) [2021-11-21 01:47:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:07,018 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-11-21 01:47:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:47:07,024 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 [2021-11-21 01:47:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:07,033 INFO L225 Difference]: With dead ends: 23 [2021-11-21 01:47:07,033 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 01:47:07,037 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:47:07,043 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:07,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:47:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 01:47:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-21 01:47:07,090 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) [2021-11-21 01:47:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-11-21 01:47:07,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2021-11-21 01:47:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:07,092 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-11-21 01:47:07,092 INFO L471 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) [2021-11-21 01:47:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-11-21 01:47:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:47:07,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:07,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:07,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:07,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:47:07,315 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:07,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1780268602, now seen corresponding path program 1 times [2021-11-21 01:47:07,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:07,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876093679] [2021-11-21 01:47:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:07,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:07,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:07,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095648884] [2021-11-21 01:47:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:07,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:07,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:07,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:47:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:07,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:47:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:07,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:07,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876093679] [2021-11-21 01:47:07,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095648884] [2021-11-21 01:47:07,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095648884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:07,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:07,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:47:07,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337038817] [2021-11-21 01:47:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:07,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:47:07,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:47:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:47:07,535 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) [2021-11-21 01:47:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:07,603 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-21 01:47:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:47:07,604 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 [2021-11-21 01:47:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:07,606 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:47:07,606 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 01:47:07,607 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:47:07,611 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:07,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:47:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 01:47:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2021-11-21 01:47:07,624 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) [2021-11-21 01:47:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2021-11-21 01:47:07,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2021-11-21 01:47:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:07,626 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2021-11-21 01:47:07,627 INFO L471 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) [2021-11-21 01:47:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2021-11-21 01:47:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:47:07,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:07,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:07,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:07,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:07,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1219869114, now seen corresponding path program 1 times [2021-11-21 01:47:07,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:07,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098628323] [2021-11-21 01:47:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:07,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:07,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:07,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501438046] [2021-11-21 01:47:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:07,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:07,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:07,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:07,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:47:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:07,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:47:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:08,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:08,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098628323] [2021-11-21 01:47:08,100 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501438046] [2021-11-21 01:47:08,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501438046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:08,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726394514] [2021-11-21 01:47:08,143 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:47:08,143 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:08,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:08,156 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:08,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:08,340 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:47:08,341 INFO L388 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 [2021-11-21 01:47:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:08,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-21 01:47:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2021-11-21 01:47:09,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,138 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-21 01:47:09,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 301 treesize of output 284 [2021-11-21 01:47:09,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:10,106 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 01:47:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2021-11-21 01:47:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:10,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:47:10,788 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:47:10,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:47:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:11,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:47:11,344 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:47:11,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:47:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:11,537 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:11,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1726394514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:11,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:47:11,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-21 01:47:11,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162978079] [2021-11-21 01:47:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:11,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:47:11,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:47:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:47:11,648 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) [2021-11-21 01:47:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:11,705 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-11-21 01:47:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:47:11,706 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 [2021-11-21 01:47:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:11,706 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:47:11,706 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:47:11,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:47:11,708 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:11,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:47:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-21 01:47:11,714 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) [2021-11-21 01:47:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-21 01:47:11,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2021-11-21 01:47:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:11,715 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-21 01:47:11,715 INFO L471 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) [2021-11-21 01:47:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-11-21 01:47:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:47:11,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:11,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:11,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:11,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:11,917 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:11,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2079016109, now seen corresponding path program 1 times [2021-11-21 01:47:11,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:11,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830313544] [2021-11-21 01:47:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:11,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:11,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406076459] [2021-11-21 01:47:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:11,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:11,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:11,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:47:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:47:11,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:47:12,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:47:12,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:12,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830313544] [2021-11-21 01:47:12,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:12,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406076459] [2021-11-21 01:47:12,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406076459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:12,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935310949] [2021-11-21 01:47:12,098 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:47:12,098 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:12,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:12,099 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:12,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,205 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:47:12,205 INFO L388 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 [2021-11-21 01:47:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-21 01:47:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-21 01:47:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:12,749 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:47:12,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 286 [2021-11-21 01:47:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:14,007 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-21 01:47:14,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2021-11-21 01:47:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:14,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:47:14,554 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:47:14,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:47:14,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:15,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:15,015 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:47:15,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:47:15,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:15,293 INFO L354 Elim1Store]: treesize reduction 212, result has 26.9 percent of original size [2021-11-21 01:47:15,294 INFO L388 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 73 treesize of output 114 [2021-11-21 01:47:15,570 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:15,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:15,737 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:15,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:16,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:47:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:16,777 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:17,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:17,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:47:17,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 01:47:17,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000946000] [2021-11-21 01:47:17,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:17,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:47:17,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:47:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:47:17,283 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) [2021-11-21 01:47:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:17,398 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-11-21 01:47:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:47:17,399 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 [2021-11-21 01:47:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:17,400 INFO L225 Difference]: With dead ends: 51 [2021-11-21 01:47:17,400 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:47:17,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:47:17,402 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:17,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:47:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-21 01:47:17,410 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) [2021-11-21 01:47:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-21 01:47:17,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2021-11-21 01:47:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:17,411 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-21 01:47:17,411 INFO L471 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) [2021-11-21 01:47:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-21 01:47:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:47:17,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:17,413 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:17,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:17,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:17,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash 362786941, now seen corresponding path program 2 times [2021-11-21 01:47:17,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543893530] [2021-11-21 01:47:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:17,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:17,632 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873442133] [2021-11-21 01:47:17,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:47:17,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:17,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:17,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:17,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:47:17,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:47:17,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:47:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:47:17,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:47:17,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:47:17,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543893530] [2021-11-21 01:47:17,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873442133] [2021-11-21 01:47:17,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873442133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709796124] [2021-11-21 01:47:17,854 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:47:17,855 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:17,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:17,855 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:17,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,954 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-21 01:47:17,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 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 [2021-11-21 01:47:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,048 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:47:18,048 INFO L388 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 [2021-11-21 01:47:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2021-11-21 01:47:18,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,508 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-21 01:47:18,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 301 treesize of output 284 [2021-11-21 01:47:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:19,241 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 01:47:19,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2021-11-21 01:47:19,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:19,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:19,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:47:19,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:20,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:20,235 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:47:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,360 INFO L354 Elim1Store]: treesize reduction 110, result has 13.4 percent of original size [2021-11-21 01:47:20,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 89 [2021-11-21 01:47:20,571 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:20,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:20,775 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:20,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:21,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:21,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:47:21,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:21,711 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:22,123 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:22,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:47:22,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 01:47:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808716901] [2021-11-21 01:47:22,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:22,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:47:22,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:47:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:47:22,125 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) [2021-11-21 01:47:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:22,197 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2021-11-21 01:47:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:47:22,197 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 [2021-11-21 01:47:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:22,199 INFO L225 Difference]: With dead ends: 72 [2021-11-21 01:47:22,199 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 01:47:22,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:47:22,200 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:22,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 01:47:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-21 01:47:22,212 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) [2021-11-21 01:47:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-11-21 01:47:22,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2021-11-21 01:47:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:22,214 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-11-21 01:47:22,214 INFO L471 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) [2021-11-21 01:47:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-11-21 01:47:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:47:22,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:22,216 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:22,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:22,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:22,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash 959660619, now seen corresponding path program 3 times [2021-11-21 01:47:22,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:22,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049543288] [2021-11-21 01:47:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:22,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:22,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:22,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813939561] [2021-11-21 01:47:22,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:47:22,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:22,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:22,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:22,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:47:22,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:47:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:47:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:47:22,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-21 01:47:22,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-21 01:47:22,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049543288] [2021-11-21 01:47:22,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813939561] [2021-11-21 01:47:22,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813939561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579078319] [2021-11-21 01:47:22,726 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:47:22,726 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:22,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:22,726 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:22,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:22,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:22,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:22,807 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:47:22,807 INFO L388 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 [2021-11-21 01:47:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:22,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 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 [2021-11-21 01:47:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-21 01:47:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:23,217 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:47:23,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 286 [2021-11-21 01:47:23,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:24,226 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 01:47:24,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2021-11-21 01:47:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:24,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:47:24,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:25,109 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:47:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:47:25,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:25,424 INFO L354 Elim1Store]: treesize reduction 212, result has 26.9 percent of original size [2021-11-21 01:47:25,424 INFO L388 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 73 treesize of output 114 [2021-11-21 01:47:25,759 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:25,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:26,057 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:26,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:26,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:47:26,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:26,863 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:27,301 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:27,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:47:27,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-21 01:47:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296193311] [2021-11-21 01:47:27,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:47:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:27,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:47:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:47:27,303 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) [2021-11-21 01:47:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:27,769 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2021-11-21 01:47:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:47:27,770 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 [2021-11-21 01:47:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:27,772 INFO L225 Difference]: With dead ends: 148 [2021-11-21 01:47:27,772 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 01:47:27,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:47:27,774 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:27,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 99 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:47:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 01:47:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2021-11-21 01:47:27,790 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) [2021-11-21 01:47:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-11-21 01:47:27,792 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2021-11-21 01:47:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:27,792 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-11-21 01:47:27,792 INFO L471 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) [2021-11-21 01:47:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-11-21 01:47:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:47:27,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:27,794 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:27,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:28,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:28,010 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1149059184, now seen corresponding path program 4 times [2021-11-21 01:47:28,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:28,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001263797] [2021-11-21 01:47:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:28,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:28,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:28,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491824905] [2021-11-21 01:47:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:47:28,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:28,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:28,018 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:28,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:47:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:28,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:47:28,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-21 01:47:28,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-21 01:47:28,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001263797] [2021-11-21 01:47:28,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491824905] [2021-11-21 01:47:28,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491824905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36210783] [2021-11-21 01:47:28,372 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:47:28,373 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:28,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:28,373 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:28,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,456 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-21 01:47:28,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 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 [2021-11-21 01:47:28,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,546 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:47:28,546 INFO L388 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 [2021-11-21 01:47:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-21 01:47:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:28,988 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:47:28,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 286 [2021-11-21 01:47:29,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:29,958 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-21 01:47:29,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2021-11-21 01:47:30,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:30,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:47:30,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:30,750 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:47:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:47:30,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:30,943 INFO L354 Elim1Store]: treesize reduction 212, result has 26.9 percent of original size [2021-11-21 01:47:30,944 INFO L388 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 73 treesize of output 114 [2021-11-21 01:47:31,251 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:31,433 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:47:31,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:47:32,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:47:32,316 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:47:32,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:47:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:47:32,453 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:32,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:32,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:47:32,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-21 01:47:32,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476329853] [2021-11-21 01:47:32,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:32,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:47:32,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:47:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:47:32,889 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) [2021-11-21 01:47:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:33,146 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2021-11-21 01:47:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:47:33,146 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 [2021-11-21 01:47:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:33,152 INFO L225 Difference]: With dead ends: 211 [2021-11-21 01:47:33,152 INFO L226 Difference]: Without dead ends: 151 [2021-11-21 01:47:33,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:47:33,155 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 158 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:33,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 30 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-21 01:47:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2021-11-21 01:47:33,204 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) [2021-11-21 01:47:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2021-11-21 01:47:33,207 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2021-11-21 01:47:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:33,208 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2021-11-21 01:47:33,208 INFO L471 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) [2021-11-21 01:47:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2021-11-21 01:47:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:47:33,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:33,210 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:33,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:33,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:47:33,410 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:33,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash -970721808, now seen corresponding path program 5 times [2021-11-21 01:47:33,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:33,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421353397] [2021-11-21 01:47:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:33,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:33,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:47:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310553985] [2021-11-21 01:47:33,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:47:33,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:33,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:33,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:33,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:58:56,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-21 01:58:56,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:58:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:58:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2021-11-21 01:58:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2021-11-21 01:58:57,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:58:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421353397] [2021-11-21 01:58:57,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:58:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310553985] [2021-11-21 01:58:57,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310553985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438928672] [2021-11-21 01:58:57,337 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:58:57,337 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:58:57,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:58:57,338 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:58:57,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:58:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,419 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:58:57,419 INFO L388 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 [2021-11-21 01:58:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,470 INFO L388 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 [2021-11-21 01:58:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2021-11-21 01:58:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:57,882 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-21 01:58:57,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 301 treesize of output 284 [2021-11-21 01:58:58,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:58:58,658 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-21 01:58:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2021-11-21 01:58:58,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:58:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:58:59,133 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:58:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:58:59,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:58:59,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:58:59,517 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:58:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:58:59,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:59,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:58:59,682 INFO L354 Elim1Store]: treesize reduction 110, result has 13.4 percent of original size [2021-11-21 01:58:59,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 89 [2021-11-21 01:58:59,867 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:58:59,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:00,313 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:59:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:01,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:59:01,200 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:59:01,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:59:01,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:01,371 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:59:01,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:59:01,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:59:01,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-21 01:59:01,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089114551] [2021-11-21 01:59:01,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:59:01,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:59:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=698, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:59:01,897 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:02,408 INFO L93 Difference]: Finished difference Result 427 states and 565 transitions. [2021-11-21 01:59:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:59:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 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 103 [2021-11-21 01:59:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:02,411 INFO L225 Difference]: With dead ends: 427 [2021-11-21 01:59:02,411 INFO L226 Difference]: Without dead ends: 307 [2021-11-21 01:59:02,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=1237, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 01:59:02,414 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 411 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:02,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 66 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:59:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-21 01:59:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 265. [2021-11-21 01:59:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2021-11-21 01:59:02,468 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 103 [2021-11-21 01:59:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:02,470 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2021-11-21 01:59:02,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2021-11-21 01:59:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-21 01:59:02,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:02,502 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:02,718 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forcibly destroying the process [2021-11-21 01:59:02,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:02,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:02,731 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:59:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 538116336, now seen corresponding path program 6 times [2021-11-21 01:59:02,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682179311] [2021-11-21 01:59:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:02,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:02,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:59:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986355861] [2021-11-21 01:59:02,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:59:02,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:02,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:02,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:02,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:59:02,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:59:02,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:59:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 01:59:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2021-11-21 01:59:03,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2021-11-21 01:59:04,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682179311] [2021-11-21 01:59:04,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:59:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986355861] [2021-11-21 01:59:04,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986355861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352603817] [2021-11-21 01:59:04,780 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:59:04,780 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:59:04,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:59:04,780 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:59:04,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:59:04,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,874 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:59:04,875 INFO L388 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 [2021-11-21 01:59:04,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:04,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 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 [2021-11-21 01:59:05,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-21 01:59:05,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:05,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:05,430 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-21 01:59:05,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 286 [2021-11-21 01:59:06,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:06,497 INFO L354 Elim1Store]: treesize reduction 88, result has 14.6 percent of original size [2021-11-21 01:59:06,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2021-11-21 01:59:06,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:06,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 01:59:06,984 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-21 01:59:06,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 68 [2021-11-21 01:59:07,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:07,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:07,382 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-21 01:59:07,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:07,522 INFO L354 Elim1Store]: treesize reduction 110, result has 13.4 percent of original size [2021-11-21 01:59:07,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 89 [2021-11-21 01:59:07,812 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:59:07,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:08,038 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:59:08,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:08,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:59:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:08,832 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:59:09,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:59:09,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:59:09,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-11-21 01:59:09,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896630718] [2021-11-21 01:59:09,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:09,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-21 01:59:09,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-21 01:59:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2957, Unknown=0, NotChecked=0, Total=4290 [2021-11-21 01:59:09,529 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:13,016 INFO L93 Difference]: Finished difference Result 1487 states and 1700 transitions. [2021-11-21 01:59:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-21 01:59:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 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 199 [2021-11-21 01:59:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:13,024 INFO L225 Difference]: With dead ends: 1487 [2021-11-21 01:59:13,024 INFO L226 Difference]: Without dead ends: 1320 [2021-11-21 01:59:13,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11225 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8720, Invalid=20010, Unknown=0, NotChecked=0, Total=28730 [2021-11-21 01:59:13,037 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 517 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:13,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 672 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:59:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-11-21 01:59:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 553. [2021-11-21 01:59:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.0815217391304348) internal successors, (597), 552 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 597 transitions. [2021-11-21 01:59:13,152 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 597 transitions. Word has length 199 [2021-11-21 01:59:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:13,156 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 597 transitions. [2021-11-21 01:59:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 597 transitions. [2021-11-21 01:59:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-21 01:59:13,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:13,169 INFO L514 BasicCegarLoop]: trace histogram [220, 220, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:13,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:59:13,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:59:13,394 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:59:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1043523286, now seen corresponding path program 7 times [2021-11-21 01:59:13,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:13,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039232078] [2021-11-21 01:59:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:13,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:13,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:59:13,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202343690] [2021-11-21 01:59:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:59:13,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:13,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:59:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2388 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:59:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2021-11-21 01:59:14,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2021-11-21 01:59:16,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:59:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039232078] [2021-11-21 01:59:16,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:59:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202343690] [2021-11-21 01:59:16,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202343690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140260361] [2021-11-21 01:59:16,306 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:59:16,306 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:59:16,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:59:16,307 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:59:16,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:59:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,376 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-21 01:59:16,377 INFO L388 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 [2021-11-21 01:59:16,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,507 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:59:16,507 INFO L388 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 [2021-11-21 01:59:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2021-11-21 01:59:16,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:16,865 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-21 01:59:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 301 treesize of output 284 [2021-11-21 01:59:17,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:17,458 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 01:59:17,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2021-11-21 01:59:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:17,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:18,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:18,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:59:18,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:18,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:18,385 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-21 01:59:18,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:59:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:59:18,586 INFO L354 Elim1Store]: treesize reduction 212, result has 26.9 percent of original size [2021-11-21 01:59:18,586 INFO L388 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 73 treesize of output 114 [2021-11-21 01:59:18,820 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:59:18,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:18,987 INFO L354 Elim1Store]: treesize reduction 77, result has 18.1 percent of original size [2021-11-21 01:59:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:59:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:59:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-11-21 01:59:19,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-21 01:59:19,779 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:59:20,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:59:20,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:59:20,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-21 01:59:20,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261644287] [2021-11-21 01:59:20,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:20,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-21 01:59:20,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:59:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-21 01:59:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=1831, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:59:20,197 INFO L87 Difference]: Start difference. First operand 553 states and 597 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:22,054 INFO L93 Difference]: Finished difference Result 1723 states and 2293 transitions. [2021-11-21 01:59:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:59:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 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 487 [2021-11-21 01:59:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:22,063 INFO L225 Difference]: With dead ends: 1723 [2021-11-21 01:59:22,063 INFO L226 Difference]: Without dead ends: 1195 [2021-11-21 01:59:22,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1404 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2580, Invalid=3740, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 01:59:22,068 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 723 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:22,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 138 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:59:22,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-11-21 01:59:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1105. [2021-11-21 01:59:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.0625) internal successors, (1173), 1104 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1173 transitions. [2021-11-21 01:59:22,245 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1173 transitions. Word has length 487 [2021-11-21 01:59:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:22,246 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1173 transitions. [2021-11-21 01:59:22,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1173 transitions. [2021-11-21 01:59:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2021-11-21 01:59:22,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:22,286 INFO L514 BasicCegarLoop]: trace histogram [460, 460, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:22,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:22,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:59:22,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:59:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1757510614, now seen corresponding path program 8 times [2021-11-21 01:59:22,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:59:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153923152] [2021-11-21 01:59:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:22,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:59:22,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:59:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153767960] [2021-11-21 01:59:22,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:59:22,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:22,565 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:22,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41504e05-7ec6-4c8c-96be-e1155719e9cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process