./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V --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 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:44:49,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:44:49,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:44:50,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:44:50,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:44:50,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:44:50,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:44:50,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:44:50,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:44:50,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:44:50,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:44:50,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:44:50,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:44:50,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:44:50,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:44:50,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:44:50,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:44:50,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:44:50,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:44:50,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:44:50,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:44:50,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:44:50,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:44:50,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:44:50,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:44:50,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:44:50,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:44:50,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:44:50,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:44:50,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:44:50,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:44:50,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:44:50,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:44:50,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:44:50,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:44:50,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:44:50,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:44:50,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:44:50,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:44:50,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:44:50,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:44:50,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:44:50,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:44:50,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:44:50,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:44:50,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:44:50,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:44:50,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:44:50,129 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:44:50,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:44:50,129 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:44:50,129 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:44:50,129 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:44:50,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:44:50,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:44:50,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:44:50,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:44:50,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:44:50,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:44:50,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:44:50,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:44:50,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:44:50,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:44:50,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:44:50,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:44:50,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:44:50,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:44:50,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:44:50,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:44:50,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:44:50,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:44:50,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:44:50,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:44:50,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:44:50,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:50,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:44:50,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:44:50,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:44:50,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:44:50,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:44:50,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:44:50,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:44:50,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:44:50,137 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_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 [2021-11-23 02:44:50,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:44:50,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:44:50,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:44:50,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:44:50,403 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:44:50,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2021-11-23 02:44:50,461 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/data/41ff2a7c0/b24fe95fa08e484f84a2062957e8cc28/FLAG879a1c172 [2021-11-23 02:44:50,887 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:44:50,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2021-11-23 02:44:50,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/data/41ff2a7c0/b24fe95fa08e484f84a2062957e8cc28/FLAG879a1c172 [2021-11-23 02:44:51,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/data/41ff2a7c0/b24fe95fa08e484f84a2062957e8cc28 [2021-11-23 02:44:51,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:44:51,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:44:51,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:44:51,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:44:51,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:44:51,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8739ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51, skipping insertion in model container [2021-11-23 02:44:51,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:44:51,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:44:51,509 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_fad2d7df-6afc-4d38-af9e-8d695a36b029/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2021-11-23 02:44:51,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:44:51,531 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:44:51,544 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_fad2d7df-6afc-4d38-af9e-8d695a36b029/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2021-11-23 02:44:51,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:44:51,564 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:44:51,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51 WrapperNode [2021-11-23 02:44:51,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:44:51,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:44:51,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:44:51,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:44:51,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,599 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-23 02:44:51,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:44:51,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:44:51,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:44:51,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:44:51,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:44:51,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:44:51,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:44:51,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:44:51,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (1/1) ... [2021-11-23 02:44:51,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:51,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:44:51,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:44:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:44:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:44:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:44:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:44:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:44:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:44:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:44:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:44:51,763 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:44:51,765 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:44:51,889 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:44:51,984 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:44:51,986 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:44:51,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:51 BoogieIcfgContainer [2021-11-23 02:44:51,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:44:51,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:44:51,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:44:51,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:44:51,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:44:51" (1/3) ... [2021-11-23 02:44:51,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22463681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:51, skipping insertion in model container [2021-11-23 02:44:51,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:51" (2/3) ... [2021-11-23 02:44:51,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22463681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:51, skipping insertion in model container [2021-11-23 02:44:51,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:51" (3/3) ... [2021-11-23 02:44:51,997 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2021-11-23 02:44:52,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:44:52,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:44:52,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:44:52,057 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 [2021-11-23 02:44:52,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:44:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2021-11-23 02:44:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:44:52,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:52,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:44:52,077 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1422444502, now seen corresponding path program 1 times [2021-11-23 02:44:52,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:52,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584058502] [2021-11-23 02:44:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:52,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:52,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584058502] [2021-11-23 02:44:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584058502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:52,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:52,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:44:52,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671469872] [2021-11-23 02:44:52,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:52,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:52,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:52,291 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2021-11-23 02:44:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:52,351 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2021-11-23 02:44:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:52,359 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 [2021-11-23 02:44:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:52,366 INFO L225 Difference]: With dead ends: 22 [2021-11-23 02:44:52,367 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 02:44:52,369 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 [2021-11-23 02:44:52,373 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:52,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 02:44:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-23 02:44:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2021-11-23 02:44:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 02:44:52,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-11-23 02:44:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 02:44:52,405 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) [2021-11-23 02:44:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 02:44:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:44:52,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:52,406 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:52,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:44:52,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash 655107671, now seen corresponding path program 1 times [2021-11-23 02:44:52,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:52,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748716073] [2021-11-23 02:44:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:52,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:44:52,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748716073] [2021-11-23 02:44:52,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748716073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:52,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684976752] [2021-11-23 02:44:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:52,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:52,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:52,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:44:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:44:52,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:44:52,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:44:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:44:52,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684976752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:44:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87644381] [2021-11-23 02:44:52,653 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:44:52,653 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:44:52,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:44:52,663 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:44:52,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:44:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:52,882 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-23 02:44:52,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-23 02:44:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:52,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-23 02:44:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:53,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 205 [2021-11-23 02:44:53,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 17 [2021-11-23 02:44:53,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:53,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 136 [2021-11-23 02:44:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 44 [2021-11-23 02:44:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:53,688 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-23 02:44:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2021-11-23 02:44:53,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-23 02:44:53,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-11-23 02:44:53,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:53,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2021-11-23 02:44:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:53,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:53,893 INFO L354 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2021-11-23 02:44:53,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 206 treesize of output 200 [2021-11-23 02:44:54,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-11-23 02:44:54,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-11-23 02:44:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,177 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-23 02:44:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 83 [2021-11-23 02:44:54,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,234 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:44:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 63 [2021-11-23 02:44:54,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,292 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:44:54,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 1 [2021-11-23 02:44:54,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 1 [2021-11-23 02:44:54,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:44:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 75 [2021-11-23 02:44:54,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 1 [2021-11-23 02:44:54,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 23 [2021-11-23 02:44:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,645 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:44:54,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 35 [2021-11-23 02:44:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,671 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:44:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 47 [2021-11-23 02:44:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,689 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:44:54,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 178 [2021-11-23 02:44:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 36 [2021-11-23 02:44:54,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:54,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:44:54,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 36 [2021-11-23 02:44:54,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:44:54,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:44:55,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:44:55,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:44:55,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:44:55,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:44:55,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43531528] [2021-11-23 02:44:55,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:44:55,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:44:55,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:44:55,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:44:55,128 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2021-11-23 02:44:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:55,179 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-23 02:44:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:44:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 10 [2021-11-23 02:44:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:55,181 INFO L225 Difference]: With dead ends: 32 [2021-11-23 02:44:55,181 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 02:44:55,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:44:55,183 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:55,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 02:44:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-11-23 02:44:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-23 02:44:55,188 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2021-11-23 02:44:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:55,189 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-23 02:44:55,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2021-11-23 02:44:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-23 02:44:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:44:55,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:55,190 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:44:55,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:55,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 674779690, now seen corresponding path program 2 times [2021-11-23 02:44:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544240263] [2021-11-23 02:44:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:55,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:44:55,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:55,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544240263] [2021-11-23 02:44:55,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544240263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:55,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256338831] [2021-11-23 02:44:55,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:44:55,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:55,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:55,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:44:55,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:44:55,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:44:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:44:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:44:55,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:44:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:44:55,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256338831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:44:55,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334472402] [2021-11-23 02:44:55,798 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:44:55,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:44:55,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:44:55,799 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:44:55,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:44:55,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,885 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-23 02:44:55,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-23 02:44:55,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-23 02:44:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:55,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 136 [2021-11-23 02:44:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 02:44:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 02:44:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 99 [2021-11-23 02:44:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 34 [2021-11-23 02:44:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,233 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-23 02:44:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2021-11-23 02:44:56,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-23 02:44:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:44:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:44:56,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,379 INFO L354 Elim1Store]: treesize reduction 38, result has 43.3 percent of original size [2021-11-23 02:44:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 100 [2021-11-23 02:44:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:44:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 02:44:56,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,523 INFO L354 Elim1Store]: treesize reduction 80, result has 43.3 percent of original size [2021-11-23 02:44:56,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 131 [2021-11-23 02:44:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2021-11-23 02:44:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,621 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:44:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 47 [2021-11-23 02:44:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:44:56,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:44:56,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:56,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-11-23 02:44:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:44:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 50 [2021-11-23 02:44:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:56,970 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-23 02:44:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2021-11-23 02:44:57,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-23 02:44:57,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-11-23 02:44:57,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:57,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2021-11-23 02:44:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,126 INFO L354 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2021-11-23 02:44:57,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 206 treesize of output 200 [2021-11-23 02:44:57,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-11-23 02:44:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:57,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-11-23 02:44:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,278 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 02:44:57,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 55 [2021-11-23 02:44:57,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:57,356 WARN L220 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:57,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-11-23 02:44:57,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 31 [2021-11-23 02:44:57,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-11-23 02:44:57,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:57,503 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-23 02:44:57,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 90 [2021-11-23 02:44:57,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:44:57,685 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:44:57,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:44:57,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:44:57,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:44:57,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2021-11-23 02:44:57,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954193136] [2021-11-23 02:44:57,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:44:57,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:44:57,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:44:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:44:57,853 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2021-11-23 02:44:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:58,005 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-11-23 02:44:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:44:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 16 [2021-11-23 02:44:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:58,008 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:44:58,008 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 02:44:58,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:44:58,009 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 85 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:58,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 16 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 02:44:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-11-23 02:44:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2021-11-23 02:44:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-23 02:44:58,017 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 16 [2021-11-23 02:44:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:58,017 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-23 02:44:58,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2021-11-23 02:44:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-23 02:44:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:44:58,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:58,019 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1] [2021-11-23 02:44:58,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:58,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:44:58,245 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash 276372204, now seen corresponding path program 3 times [2021-11-23 02:44:58,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:58,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039022052] [2021-11-23 02:44:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:58,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:44:58,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039022052] [2021-11-23 02:44:58,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039022052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:58,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042398664] [2021-11-23 02:44:58,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:44:58,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:58,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:58,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:58,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:44:58,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:44:58,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:44:58,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:44:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:44:58,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:44:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 02:44:58,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042398664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:44:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724463229] [2021-11-23 02:44:58,742 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:44:58,742 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:44:58,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:44:58,743 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:44:58,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:44:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,821 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-23 02:44:58,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 23 treesize of output 42 [2021-11-23 02:44:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,901 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-23 02:44:58,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-23 02:44:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 205 [2021-11-23 02:44:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:58,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2021-11-23 02:44:59,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 153 [2021-11-23 02:44:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 45 [2021-11-23 02:44:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 79 [2021-11-23 02:44:59,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 51 [2021-11-23 02:44:59,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,270 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-23 02:44:59,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2021-11-23 02:44:59,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-23 02:44:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:44:59,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 43 [2021-11-23 02:44:59,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,402 INFO L354 Elim1Store]: treesize reduction 38, result has 43.3 percent of original size [2021-11-23 02:44:59,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 100 [2021-11-23 02:44:59,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:44:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-11-23 02:44:59,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-23 02:44:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,576 INFO L354 Elim1Store]: treesize reduction 80, result has 43.3 percent of original size [2021-11-23 02:44:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 131 [2021-11-23 02:44:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-11-23 02:44:59,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:59,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2021-11-23 02:44:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-23 02:44:59,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:59,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2021-11-23 02:44:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:44:59,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 38 [2021-11-23 02:44:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:59,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-11-23 02:44:59,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:59,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-11-23 02:44:59,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:59,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:44:59,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:45:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:45:00,120 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:45:00,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '632#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:45:00,295 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:45:00,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:45:00,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-23 02:45:00,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394493857] [2021-11-23 02:45:00,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:45:00,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:45:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:45:00,298 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2021-11-23 02:45:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:00,420 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-11-23 02:45:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:45:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 31 [2021-11-23 02:45:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:00,422 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:45:00,422 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:45:00,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:45:00,424 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:00,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:45:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-11-23 02:45:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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) [2021-11-23 02:45:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-11-23 02:45:00,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 31 [2021-11-23 02:45:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:00,433 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-11-23 02:45:00,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2021-11-23 02:45:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-11-23 02:45:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:45:00,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:00,436 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1] [2021-11-23 02:45:00,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:00,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1428057194, now seen corresponding path program 4 times [2021-11-23 02:45:00,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240440289] [2021-11-23 02:45:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:00,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 02:45:00,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:00,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240440289] [2021-11-23 02:45:00,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240440289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:00,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597003123] [2021-11-23 02:45:00,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:45:00,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:00,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:00,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:00,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:45:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:45:00,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 02:45:01,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-23 02:45:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597003123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017892241] [2021-11-23 02:45:01,412 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 02:45:01,412 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:45:01,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:45:01,412 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:45:01,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:45:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,491 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-23 02:45:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-23 02:45:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-23 02:45:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 205 [2021-11-23 02:45:01,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 21 [2021-11-23 02:45:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 196 [2021-11-23 02:45:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 59 [2021-11-23 02:45:01,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:45:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:01,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 147 [2021-11-23 02:45:01,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:01,833 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-23 02:45:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2021-11-23 02:45:01,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-23 02:45:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:01,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:45:01,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 39 [2021-11-23 02:45:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-11-23 02:45:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:01,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:01,998 INFO L354 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2021-11-23 02:45:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 238 treesize of output 232 [2021-11-23 02:45:02,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:02,149 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 02:45:02,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 329 treesize of output 291 [2021-11-23 02:45:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:02,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:45:02,208 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 02:45:02,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 38 [2021-11-23 02:45:02,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:45:02,353 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:45:02,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1176#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:45:02,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:45:02,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:45:02,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 29 [2021-11-23 02:45:02,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874280667] [2021-11-23 02:45:02,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:02,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:45:02,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:45:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=670, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:45:02,540 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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) [2021-11-23 02:45:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:02,776 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2021-11-23 02:45:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:45:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 54 [2021-11-23 02:45:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:02,778 INFO L225 Difference]: With dead ends: 153 [2021-11-23 02:45:02,778 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 02:45:02,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=452, Invalid=670, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:45:02,780 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:02,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 8 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:45:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 02:45:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2021-11-23 02:45:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2021-11-23 02:45:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-23 02:45:02,793 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 54 [2021-11-23 02:45:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:02,794 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-23 02:45:02,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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) [2021-11-23 02:45:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-23 02:45:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:45:02,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:02,796 INFO L514 BasicCegarLoop]: trace histogram [26, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-23 02:45:02,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:03,007 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1933947628, now seen corresponding path program 5 times [2021-11-23 02:45:03,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347752945] [2021-11-23 02:45:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:03,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-23 02:45:03,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:03,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347752945] [2021-11-23 02:45:03,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347752945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:03,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956903194] [2021-11-23 02:45:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:45:03,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:03,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:03,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:03,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fad2d7df-6afc-4d38-af9e-8d695a36b029/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process