./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.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_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/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_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/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_a52f1112-dde0-48fd-b869-ecfa794c7c65/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 b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:42:05,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:42:05,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:42:05,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:42:05,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:42:05,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:42:05,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:42:05,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:42:05,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:42:05,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:42:05,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:42:05,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:42:05,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:42:05,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:42:05,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:42:05,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:42:05,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:42:05,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:42:05,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:42:05,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:42:05,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:42:05,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:42:05,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:42:05,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:42:05,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:42:05,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:42:05,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:42:05,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:42:05,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:42:05,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:42:05,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:42:05,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:42:05,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:42:05,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:42:05,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:42:05,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:42:05,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:42:05,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:42:05,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:42:05,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:42:05,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:42:05,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:42:05,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:42:05,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:42:05,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:42:05,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:42:05,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:42:05,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:42:05,161 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:42:05,161 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:42:05,162 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:42:05,162 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:42:05,163 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:42:05,163 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:42:05,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:42:05,164 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:42:05,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:42:05,164 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:42:05,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:42:05,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:42:05,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:42:05,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:42:05,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:42:05,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:42:05,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:42:05,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:42:05,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:42:05,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:42:05,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:42:05,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:42:05,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:42:05,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:42:05,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:42:05,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:42:05,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:42:05,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:42:05,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:42:05,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:42:05,172 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:42:05,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:42:05,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:42:05,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:42:05,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:42:05,173 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_a52f1112-dde0-48fd-b869-ecfa794c7c65/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8fdffcd3d5c4257bd11c08a4d1194cf24a2807af8b572699be11b4eeff19c02 [2021-11-21 01:42:05,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:42:05,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:42:05,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:42:05,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:42:05,514 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:42:05,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-21 01:42:05,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/data/7f5ddfe45/89850401a61c407db1b2a385dc467011/FLAGe6c4427b7 [2021-11-21 01:42:06,111 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:42:06,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-11-21 01:42:06,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/data/7f5ddfe45/89850401a61c407db1b2a385dc467011/FLAGe6c4427b7 [2021-11-21 01:42:06,483 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/data/7f5ddfe45/89850401a61c407db1b2a385dc467011 [2021-11-21 01:42:06,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:42:06,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:42:06,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:42:06,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:42:06,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:42:06,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2b365c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06, skipping insertion in model container [2021-11-21 01:42:06,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:42:06,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:42:06,683 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_a52f1112-dde0-48fd-b869-ecfa794c7c65/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-21 01:42:06,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:42:06,721 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:42:06,738 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_a52f1112-dde0-48fd-b869-ecfa794c7c65/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] [2021-11-21 01:42:06,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:42:06,775 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:42:06,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06 WrapperNode [2021-11-21 01:42:06,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:42:06,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:42:06,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:42:06,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:42:06,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,824 INFO L137 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-21 01:42:06,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:42:06,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:42:06,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:42:06,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:42:06,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:42:06,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:42:06,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:42:06,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:42:06,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (1/1) ... [2021-11-21 01:42:06,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:42:06,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:06,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:42:06,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:42:06,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:42:06,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:42:06,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:42:06,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:42:06,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:42:06,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:42:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:42:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:42:07,051 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:42:07,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:42:07,213 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:42:07,261 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:42:07,261 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:42:07,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:07 BoogieIcfgContainer [2021-11-21 01:42:07,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:42:07,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:42:07,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:42:07,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:42:07,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:42:06" (1/3) ... [2021-11-21 01:42:07,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b037a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:42:07, skipping insertion in model container [2021-11-21 01:42:07,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:06" (2/3) ... [2021-11-21 01:42:07,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b037a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:42:07, skipping insertion in model container [2021-11-21 01:42:07,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:07" (3/3) ... [2021-11-21 01:42:07,271 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2021-11-21 01:42:07,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:42:07,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:42:07,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:42:07,353 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 01:42:07,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:42:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 01:42:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:42:07,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:07,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:42:07,384 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1597235250, now seen corresponding path program 1 times [2021-11-21 01:42:07,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:07,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016002123] [2021-11-21 01:42:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:07,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:07,564 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 01:42:07,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:07,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016002123] [2021-11-21 01:42:07,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016002123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:07,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:07,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:42:07,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773196657] [2021-11-21 01:42:07,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:07,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:07,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:42:07,602 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:07,647 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-21 01:42:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:42:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:07,658 INFO L225 Difference]: With dead ends: 17 [2021-11-21 01:42:07,658 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 01:42:07,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:42:07,667 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:07,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 01:42:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 01:42:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 01:42:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-21 01:42:07,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-21 01:42:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:07,712 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-21 01:42:07,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-21 01:42:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:42:07,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:07,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:07,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:42:07,715 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1770300940, now seen corresponding path program 1 times [2021-11-21 01:42:07,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:07,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565650143] [2021-11-21 01:42:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:07,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:07,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565650143] [2021-11-21 01:42:07,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565650143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987798580] [2021-11-21 01:42:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:07,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:07,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:07,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:42:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:42:07,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:08,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:08,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987798580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145151207] [2021-11-21 01:42:08,166 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:42:08,166 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:08,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:08,177 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:08,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,498 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:08,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:42:08,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:08,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:42:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:09,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:09,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:09,297 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:42:09,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 344 treesize of output 342 [2021-11-21 01:42:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:10,369 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:42:10,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:42:10,449 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:10,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1145151207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:10,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:42:10,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-21 01:42:10,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703584365] [2021-11-21 01:42:10,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:10,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:42:10,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:42:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:42:10,524 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:42:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:10,565 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-21 01:42:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:42:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:42:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:10,566 INFO L225 Difference]: With dead ends: 15 [2021-11-21 01:42:10,567 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 01:42:10,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:42:10,569 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:10,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 01:42:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-21 01:42:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 01:42:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-21 01:42:10,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-21 01:42:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:10,575 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-21 01:42:10,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 01:42:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-21 01:42:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:42:10,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:10,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:10,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:42:10,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:10,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash -957214816, now seen corresponding path program 1 times [2021-11-21 01:42:10,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:10,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469462289] [2021-11-21 01:42:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:10,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:42:10,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469462289] [2021-11-21 01:42:10,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469462289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315567337] [2021-11-21 01:42:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:10,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:10,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:10,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:42:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:42:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:42:10,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:42:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315567337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991196175] [2021-11-21 01:42:11,014 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:42:11,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:11,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:11,015 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:11,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,214 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:11,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:11,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:42:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:42:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:11,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:11,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:11,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:11,750 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:42:11,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 344 treesize of output 342 [2021-11-21 01:42:12,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:12,737 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:42:12,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:42:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:12,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:12,931 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 01:42:12,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-21 01:42:13,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:13,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:13,179 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:13,662 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:13,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:13,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:42:13,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-21 01:42:13,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346990997] [2021-11-21 01:42:13,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:13,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:42:13,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:13,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:42:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:42:13,845 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 01:42:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:13,877 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-21 01:42:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:42:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:42:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:13,879 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:42:13,879 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 01:42:13,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:42:13,881 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:13,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 01:42:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 01:42:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-21 01:42:13,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-21 01:42:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:13,888 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-21 01:42:13,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 01:42:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-21 01:42:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:42:13,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:13,889 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:13,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:14,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1834950302, now seen corresponding path program 2 times [2021-11-21 01:42:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490298035] [2021-11-21 01:42:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:14,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:42:14,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490298035] [2021-11-21 01:42:14,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490298035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:14,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807827230] [2021-11-21 01:42:14,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:14,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:14,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:14,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:14,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:42:14,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:42:14,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:14,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:42:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:42:14,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:42:14,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807827230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254763545] [2021-11-21 01:42:14,403 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:42:14,403 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:14,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:14,404 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:14,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,560 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:14,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:14,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:42:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:42:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:14,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:14,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:15,072 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:42:15,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 346 [2021-11-21 01:42:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:15,809 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:42:15,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:42:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:15,959 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 01:42:15,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-21 01:42:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:16,190 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:16,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:16,619 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:16,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:16,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:42:16,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2021-11-21 01:42:16,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887691541] [2021-11-21 01:42:16,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:16,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:42:16,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:42:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:42:16,769 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 01:42:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:16,959 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-21 01:42:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:42:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) Word has length 11 [2021-11-21 01:42:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:16,963 INFO L225 Difference]: With dead ends: 55 [2021-11-21 01:42:16,963 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 01:42:16,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:42:16,965 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:16,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 24 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:42:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 01:42:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2021-11-21 01:42:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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 01:42:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-21 01:42:16,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-11-21 01:42:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:16,974 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-21 01:42:16,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 01:42:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-21 01:42:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:42:16,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:16,976 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:17,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:17,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:17,197 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -572813472, now seen corresponding path program 3 times [2021-11-21 01:42:17,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:17,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63963589] [2021-11-21 01:42:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:17,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:17,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63963589] [2021-11-21 01:42:17,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63963589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181423501] [2021-11-21 01:42:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:42:17,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:17,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:17,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:42:17,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:42:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:42:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:17,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181423501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:17,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102556486] [2021-11-21 01:42:17,936 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:42:17,936 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:17,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:17,937 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:17,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,060 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-21 01:42:18,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-21 01:42:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,260 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:18,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:42:18,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:18,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:18,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:18,614 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:42:18,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 344 treesize of output 342 [2021-11-21 01:42:19,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,264 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:42:19,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:42:19,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,372 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:19,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:19,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:19,568 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:19,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:19,984 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:20,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:20,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:42:20,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-11-21 01:42:20,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403035262] [2021-11-21 01:42:20,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:20,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:42:20,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:20,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:42:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:42:20,146 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:20,220 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-11-21 01:42:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:42:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:42:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:20,221 INFO L225 Difference]: With dead ends: 44 [2021-11-21 01:42:20,221 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:42:20,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:42:20,223 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:20,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:42:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:42:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:42:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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 01:42:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-21 01:42:20,233 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2021-11-21 01:42:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:20,234 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-21 01:42:20,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-21 01:42:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:42:20,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:20,235 INFO L514 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:20,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:20,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:20,448 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 428208670, now seen corresponding path program 4 times [2021-11-21 01:42:20,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37999156] [2021-11-21 01:42:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:20,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:20,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:20,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37999156] [2021-11-21 01:42:20,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37999156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326780086] [2021-11-21 01:42:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:42:20,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:20,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:20,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:20,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:42:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:42:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:21,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:21,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326780086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:21,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102993338] [2021-11-21 01:42:21,490 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:42:21,490 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:21,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:21,491 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:21,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,604 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:21,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:42:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:42:21,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:21,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,011 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:42:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 354 treesize of output 340 [2021-11-21 01:42:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,428 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:42:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:42:22,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,593 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:22,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:22,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:22,823 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:22,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:23,154 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:23,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:23,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:42:23,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-21 01:42:23,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525929918] [2021-11-21 01:42:23,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:23,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-21 01:42:23,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-21 01:42:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:42:23,307 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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 01:42:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:23,462 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2021-11-21 01:42:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-21 01:42:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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 29 [2021-11-21 01:42:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:23,466 INFO L225 Difference]: With dead ends: 62 [2021-11-21 01:42:23,467 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 01:42:23,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:42:23,471 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:23,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:42:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 01:42:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-21 01:42:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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 01:42:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-21 01:42:23,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 29 [2021-11-21 01:42:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:23,501 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-21 01:42:23,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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 01:42:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-21 01:42:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:42:23,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:23,505 INFO L514 BasicCegarLoop]: trace histogram [34, 7, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:23,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:23,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:23,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash 200684638, now seen corresponding path program 5 times [2021-11-21 01:42:23,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:23,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618692684] [2021-11-21 01:42:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:23,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:42:24,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618692684] [2021-11-21 01:42:24,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618692684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191641643] [2021-11-21 01:42:24,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:24,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:24,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:42:24,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:42:24,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:42:24,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-21 01:42:24,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-21 01:42:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191641643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:25,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875370786] [2021-11-21 01:42:25,194 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:42:25,194 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:25,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:25,194 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:25,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,363 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:42:25,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:42:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:42:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:42:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:25,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:25,729 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:42:25,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 354 treesize of output 340 [2021-11-21 01:42:26,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,082 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:42:26,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:42:26,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,211 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:26,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:42:26,427 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:42:26,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:42:26,815 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:26,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:26,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:42:26,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 10, 10] total 54 [2021-11-21 01:42:26,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024397578] [2021-11-21 01:42:26,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:26,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-21 01:42:26,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-21 01:42:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=1873, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 01:42:26,995 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 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 01:42:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:28,802 INFO L93 Difference]: Finished difference Result 313 states and 361 transitions. [2021-11-21 01:42:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-21 01:42:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 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 47 [2021-11-21 01:42:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:28,810 INFO L225 Difference]: With dead ends: 313 [2021-11-21 01:42:28,810 INFO L226 Difference]: Without dead ends: 300 [2021-11-21 01:42:28,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3334, Invalid=5408, Unknown=0, NotChecked=0, Total=8742 [2021-11-21 01:42:28,815 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 718 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:28,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 147 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:42:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-21 01:42:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 94. [2021-11-21 01:42:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 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 01:42:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-11-21 01:42:28,855 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 47 [2021-11-21 01:42:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:28,856 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-11-21 01:42:28,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 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 01:42:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-11-21 01:42:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 01:42:28,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:28,860 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:28,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:29,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:42:29,080 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1790385632, now seen corresponding path program 6 times [2021-11-21 01:42:29,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296159378] [2021-11-21 01:42:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:29,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-21 01:42:30,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296159378] [2021-11-21 01:42:30,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296159378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:42:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767434677] [2021-11-21 01:42:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:42:30,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:30,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:30,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:45:14,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:45:14,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-21 01:45:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-21 01:45:16,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-21 01:45:18,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767434677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776709120] [2021-11-21 01:45:18,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:45:18,558 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:18,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:18,558 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:18,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:18,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,718 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:45:18,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:45:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:45:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:18,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:45:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:19,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:19,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:19,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:19,179 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:45:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 344 treesize of output 342 [2021-11-21 01:45:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:19,887 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:45:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:45:20,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:20,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:20,047 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 01:45:20,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-21 01:45:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:20,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:20,292 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:45:20,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:45:20,693 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:20,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:20,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:20,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 135 [2021-11-21 01:45:20,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634226933] [2021-11-21 01:45:20,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:20,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-21 01:45:20,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:20,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-21 01:45:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=10945, Unknown=0, NotChecked=0, Total=19460 [2021-11-21 01:45:20,968 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 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 01:45:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:26,274 INFO L93 Difference]: Finished difference Result 664 states and 757 transitions. [2021-11-21 01:45:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-21 01:45:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 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 92 [2021-11-21 01:45:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:26,279 INFO L225 Difference]: With dead ends: 664 [2021-11-21 01:45:26,280 INFO L226 Difference]: Without dead ends: 615 [2021-11-21 01:45:26,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12926 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=12739, Invalid=20933, Unknown=0, NotChecked=0, Total=33672 [2021-11-21 01:45:26,293 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1874 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 1149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1149 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:26,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1874 Valid, 333 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1149 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:45:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-21 01:45:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 184. [2021-11-21 01:45:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 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 01:45:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-11-21 01:45:26,360 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 92 [2021-11-21 01:45:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:26,363 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-11-21 01:45:26,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 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 01:45:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-11-21 01:45:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-21 01:45:26,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:26,378 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:26,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:26,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:26,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 222186702, now seen corresponding path program 7 times [2021-11-21 01:45:26,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126479544] [2021-11-21 01:45:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:26,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-21 01:45:30,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:30,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126479544] [2021-11-21 01:45:30,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126479544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513013746] [2021-11-21 01:45:30,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:45:30,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:30,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:30,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:30,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:45:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:30,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-21 01:45:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-21 01:45:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-21 01:45:44,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513013746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640499992] [2021-11-21 01:45:44,011 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:45:44,011 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:44,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:44,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:44,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,188 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:45:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:45:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:45:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:45:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:44,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:44,585 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:45:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 354 treesize of output 340 [2021-11-21 01:45:44,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:44,946 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:45:44,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-21 01:45:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:45,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:45,081 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 01:45:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-21 01:45:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:45:45,237 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:45:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-21 01:45:45,715 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:45,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:45,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 268 [2021-11-21 01:45:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556520506] [2021-11-21 01:45:45,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:45,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2021-11-21 01:45:45,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2021-11-21 01:45:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33027, Invalid=41229, Unknown=0, NotChecked=0, Total=74256 [2021-11-21 01:45:45,949 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 269 states, 269 states have (on average 1.0223048327137547) internal successors, (275), 268 states have internal predecessors, (275), 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 01:45:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:46,640 INFO L93 Difference]: Finished difference Result 368 states and 461 transitions. [2021-11-21 01:45:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-11-21 01:45:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 1.0223048327137547) internal successors, (275), 268 states have internal predecessors, (275), 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 182 [2021-11-21 01:45:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:46,643 INFO L225 Difference]: With dead ends: 368 [2021-11-21 01:45:46,643 INFO L226 Difference]: Without dead ends: 274 [2021-11-21 01:45:46,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33446 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=33027, Invalid=41229, Unknown=0, NotChecked=0, Total=74256 [2021-11-21 01:45:46,650 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:46,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:45:46,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-21 01:45:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-21 01:45:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.010989010989011) internal successors, (276), 273 states have internal predecessors, (276), 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 01:45:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2021-11-21 01:45:46,694 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 182 [2021-11-21 01:45:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:46,695 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2021-11-21 01:45:46,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 1.0223048327137547) internal successors, (275), 268 states have internal predecessors, (275), 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 01:45:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2021-11-21 01:45:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-21 01:45:46,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:46,700 INFO L514 BasicCegarLoop]: trace histogram [178, 88, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:46,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:46,916 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -109262450, now seen corresponding path program 8 times [2021-11-21 01:45:46,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:46,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324967969] [2021-11-21 01:45:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:46,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19847 backedges. 0 proven. 15931 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-11-21 01:45:59,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324967969] [2021-11-21 01:45:59,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324967969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743829988] [2021-11-21 01:45:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:45:59,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:59,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:59,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a52f1112-dde0-48fd-b869-ecfa794c7c65/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process