./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --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_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/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_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/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_80faa9da-1d58-48f1-9b8d-189562ea6ba8/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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:46:41,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:46:41,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:46:41,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:46:41,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:46:41,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:46:41,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:46:41,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:46:41,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:46:41,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:46:41,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:46:41,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:46:41,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:46:41,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:46:41,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:46:41,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:46:41,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:46:41,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:46:41,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:46:41,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:46:41,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:46:41,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:46:41,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:46:41,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:46:41,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:46:41,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:46:41,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:46:41,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:46:41,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:46:41,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:46:41,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:46:41,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:46:41,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:46:41,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:46:41,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:46:41,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:46:41,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:46:41,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:46:41,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:46:41,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:46:41,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:46:41,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:46:41,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:46:41,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:46:41,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:46:41,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:46:41,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:46:41,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:46:41,176 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:46:41,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:46:41,177 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:46:41,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:46:41,178 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:46:41,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:46:41,179 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:46:41,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:46:41,179 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:46:41,180 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:46:41,180 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:46:41,181 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:46:41,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:46:41,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:46:41,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:46:41,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:46:41,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:46:41,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:46:41,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:46:41,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:46:41,185 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:46:41,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:46:41,186 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:46:41,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:46:41,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:46:41,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:46:41,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:46:41,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:46:41,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:46:41,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:46:41,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:46:41,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:46:41,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:46:41,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:46:41,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:46:41,190 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_80faa9da-1d58-48f1-9b8d-189562ea6ba8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2021-11-23 03:46:41,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:46:41,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:46:41,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:46:41,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:46:41,460 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:46:41,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-23 03:46:41,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/data/9a5410c09/4df6cccedc0748e2b5f16b52b45e5d4a/FLAGc12f7fd46 [2021-11-23 03:46:42,091 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:46:42,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-23 03:46:42,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/data/9a5410c09/4df6cccedc0748e2b5f16b52b45e5d4a/FLAGc12f7fd46 [2021-11-23 03:46:42,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/data/9a5410c09/4df6cccedc0748e2b5f16b52b45e5d4a [2021-11-23 03:46:42,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:46:42,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:46:42,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:46:42,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:46:42,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:46:42,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f8852f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42, skipping insertion in model container [2021-11-23 03:46:42,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:46:42,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:46:42,832 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_80faa9da-1d58-48f1-9b8d-189562ea6ba8/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-23 03:46:42,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:46:42,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:46:42,874 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_80faa9da-1d58-48f1-9b8d-189562ea6ba8/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-23 03:46:42,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:46:42,898 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:46:42,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42 WrapperNode [2021-11-23 03:46:42,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:46:42,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:46:42,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:46:42,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:46:42,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,937 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-11-23 03:46:42,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:46:42,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:46:42,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:46:42,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:46:42,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:46:42,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:46:42,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:46:42,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:46:42,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (1/1) ... [2021-11-23 03:46:42,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:46:42,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:43,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:46:43,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:46:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:46:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:46:43,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:46:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:46:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:46:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:46:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:46:43,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:46:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:46:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:46:43,118 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:46:43,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:46:43,267 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:46:43,310 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:46:43,320 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:46:43,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:43 BoogieIcfgContainer [2021-11-23 03:46:43,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:46:43,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:46:43,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:46:43,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:46:43,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:46:42" (1/3) ... [2021-11-23 03:46:43,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb2d3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:43, skipping insertion in model container [2021-11-23 03:46:43,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:42" (2/3) ... [2021-11-23 03:46:43,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb2d3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:43, skipping insertion in model container [2021-11-23 03:46:43,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:43" (3/3) ... [2021-11-23 03:46:43,359 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2021-11-23 03:46:43,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:46:43,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:46:43,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:46:43,455 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 03:46:43,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:46:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:46:43,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:43,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:43,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:43,501 INFO L85 PathProgramCache]: Analyzing trace with hash 857550697, now seen corresponding path program 1 times [2021-11-23 03:46:43,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:43,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296724499] [2021-11-23 03:46:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:43,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:43,688 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 03:46:43,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:43,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296724499] [2021-11-23 03:46:43,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296724499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:43,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:43,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:46:43,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147895981] [2021-11-23 03:46:43,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:43,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:46:43,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:46:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:46:43,742 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:46:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:43,809 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-23 03:46:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:46:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 03:46:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:43,821 INFO L225 Difference]: With dead ends: 24 [2021-11-23 03:46:43,821 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:46:43,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:46:43,828 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:43,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:46:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:46:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-23 03:46:43,871 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-23 03:46:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:43,873 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-23 03:46:43,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:46:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-23 03:46:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:46:43,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:43,877 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:43,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:46:43,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1659101310, now seen corresponding path program 1 times [2021-11-23 03:46:43,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:43,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747682854] [2021-11-23 03:46:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:43,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:46:44,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:44,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747682854] [2021-11-23 03:46:44,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747682854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:44,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:46:44,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386511920] [2021-11-23 03:46:44,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:44,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:46:44,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:46:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:44,056 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:44,088 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-23 03:46:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:44,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-23 03:46:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:44,090 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:46:44,090 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:46:44,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:46:44,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:44,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:46:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:46:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-23 03:46:44,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2021-11-23 03:46:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:44,099 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-23 03:46:44,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-23 03:46:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:46:44,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:44,100 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:44,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:46:44,101 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:44,101 INFO L85 PathProgramCache]: Analyzing trace with hash 107201699, now seen corresponding path program 1 times [2021-11-23 03:46:44,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:44,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075356572] [2021-11-23 03:46:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:44,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:46:44,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:44,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075356572] [2021-11-23 03:46:44,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075356572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:44,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:44,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:46:44,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500951704] [2021-11-23 03:46:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:44,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:46:44,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:46:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:46:44,245 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:44,284 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-23 03:46:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:46:44,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-23 03:46:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:44,302 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:46:44,302 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:46:44,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:46:44,305 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:44,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:46:44,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:46:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 03:46:44,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2021-11-23 03:46:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:44,311 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 03:46:44,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 03:46:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:46:44,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:44,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:44,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:46:44,313 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1924715561, now seen corresponding path program 1 times [2021-11-23 03:46:44,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:44,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951165887] [2021-11-23 03:46:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:44,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:44,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:46:44,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759583425] [2021-11-23 03:46:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:44,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:44,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:44,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:44,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:46:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:46:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:46:44,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:46:44,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951165887] [2021-11-23 03:46:44,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:46:44,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759583425] [2021-11-23 03:46:44,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759583425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:44,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754539029] [2021-11-23 03:46:44,794 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:46:44,794 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:44,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:44,805 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:44,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,121 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:46:45,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:46:45,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 03:46:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-23 03:46:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,521 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-23 03:46:45,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 437 treesize of output 418 [2021-11-23 03:46:45,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,663 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-23 03:46:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2021-11-23 03:46:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:45,789 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-23 03:46:45,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-23 03:46:45,948 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-23 03:46:45,984 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:47,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '307#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:47,515 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:47,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:46:47,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-23 03:46:47,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611034727] [2021-11-23 03:46:47,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:47,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:46:47,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:46:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:46:47,518 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:46:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:47,704 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-23 03:46:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:46:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2021-11-23 03:46:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:47,706 INFO L225 Difference]: With dead ends: 49 [2021-11-23 03:46:47,707 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:46:47,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:46:47,708 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:47,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:46:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-23 03:46:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:46:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-23 03:46:47,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2021-11-23 03:46:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:47,716 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-23 03:46:47,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:46:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-23 03:46:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:46:47,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:47,717 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:47,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:47,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:47,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1012202345, now seen corresponding path program 2 times [2021-11-23 03:46:47,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:47,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553792854] [2021-11-23 03:46:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:47,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:47,957 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:46:47,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708127038] [2021-11-23 03:46:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:47,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:47,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:47,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:47,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:46:48,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:46:48,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:48,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:46:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:46:48,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:46:48,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:48,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553792854] [2021-11-23 03:46:48,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:46:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708127038] [2021-11-23 03:46:48,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708127038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220144613] [2021-11-23 03:46:48,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:46:48,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:48,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:48,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:48,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,344 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 03:46:48,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-23 03:46:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,450 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:46:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 03:46:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-23 03:46:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,692 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-23 03:46:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 437 treesize of output 418 [2021-11-23 03:46:48,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,792 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-23 03:46:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2021-11-23 03:46:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:48,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:48,911 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-23 03:46:48,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-23 03:46:49,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-23 03:46:49,110 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:50,428 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:50,429 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:50,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:46:50,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-23 03:46:50,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683741996] [2021-11-23 03:46:50,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:50,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:46:50,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:50,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:46:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:46:50,431 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:46:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:50,514 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-23 03:46:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:46:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-23 03:46:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:50,516 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:46:50,516 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:46:50,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:46:50,518 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:50,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:46:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 03:46:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:46:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 03:46:50,525 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-11-23 03:46:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:50,526 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 03:46:50,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 03:46:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 03:46:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:46:50,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:50,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:50,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 03:46:50,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:50,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:50,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2055356873, now seen corresponding path program 3 times [2021-11-23 03:46:50,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:50,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756683765] [2021-11-23 03:46:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:50,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:50,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:46:50,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453472352] [2021-11-23 03:46:50,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:46:50,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:50,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:50,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:50,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80faa9da-1d58-48f1-9b8d-189562ea6ba8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:46:50,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:46:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 03:46:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:46:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:46:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-23 03:46:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:51,109 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-23 03:46:51,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 68 treesize of output 65 [2021-11-23 03:46:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:51,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:51,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:52,773 INFO L354 Elim1Store]: treesize reduction 4499, result has 5.1 percent of original size [2021-11-23 03:46:52,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 589 treesize of output 446 [2021-11-23 03:46:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 73 [2021-11-23 03:46:52,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:46:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 191 [2021-11-23 03:46:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:52,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:52,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:53,002 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:46:53,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 209 treesize of output 100 [2021-11-23 03:46:53,709 INFO L354 Elim1Store]: treesize reduction 549, result has 3.5 percent of original size [2021-11-23 03:46:53,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 130 treesize of output 59 [2021-11-23 03:46:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:53,763 INFO L328 TraceCheckSpWp]: Computing backward predicates...