./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7 --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 dda1041cfa36c4017116912acad0e6776c355afeb5733cf0531e7478051aaa6d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:26:32,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:26:32,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:26:32,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:26:32,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:26:32,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:26:32,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:26:32,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:26:32,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:26:32,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:26:32,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:26:32,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:26:32,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:26:32,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:26:32,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:26:32,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:26:32,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:26:32,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:26:32,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:26:32,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:26:32,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:26:32,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:26:32,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:26:32,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:26:32,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:26:32,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:26:32,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:26:32,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:26:32,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:26:32,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:26:32,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:26:32,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:26:32,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:26:32,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:26:32,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:26:32,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:26:32,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:26:32,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:26:32,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:26:32,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:26:32,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:26:32,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:26:33,034 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:26:33,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:26:33,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:26:33,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:26:33,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:26:33,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:26:33,036 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:26:33,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:26:33,036 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:26:33,037 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:26:33,037 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:26:33,037 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:26:33,037 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:26:33,038 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:26:33,038 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:26:33,038 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:26:33,038 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:26:33,039 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:26:33,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:26:33,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:26:33,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:26:33,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:26:33,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:26:33,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:26:33,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:26:33,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:26:33,043 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:26:33,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:26:33,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:26:33,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:26:33,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:26:33,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:26:33,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:26:33,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:26:33,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:26:33,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:26:33,045 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:26:33,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:26:33,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:26:33,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:26:33,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:26:33,046 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_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda1041cfa36c4017116912acad0e6776c355afeb5733cf0531e7478051aaa6d [2021-11-25 18:26:33,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:26:33,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:26:33,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:26:33,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:26:33,497 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:26:33,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2021-11-25 18:26:33,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/data/459657a18/0d7572753904433d8288c6e5aeb17a8c/FLAGd85a4c83c [2021-11-25 18:26:34,213 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:26:34,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/sv-benchmarks/c/array-examples/standard_init8_ground-1.i [2021-11-25 18:26:34,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/data/459657a18/0d7572753904433d8288c6e5aeb17a8c/FLAGd85a4c83c [2021-11-25 18:26:34,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/data/459657a18/0d7572753904433d8288c6e5aeb17a8c [2021-11-25 18:26:34,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:26:34,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:26:34,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:26:34,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:26:34,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:26:34,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32948be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34, skipping insertion in model container [2021-11-25 18:26:34,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:26:34,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:26:34,824 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_08220529-1324-4a41-8ab9-08a8187e6e16/sv-benchmarks/c/array-examples/standard_init8_ground-1.i[816,829] [2021-11-25 18:26:34,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:26:34,856 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:26:34,869 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_08220529-1324-4a41-8ab9-08a8187e6e16/sv-benchmarks/c/array-examples/standard_init8_ground-1.i[816,829] [2021-11-25 18:26:34,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:26:34,895 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:26:34,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34 WrapperNode [2021-11-25 18:26:34,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:26:34,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:26:34,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:26:34,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:26:34,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,943 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2021-11-25 18:26:34,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:26:34,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:26:34,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:26:34,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:26:34,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:26:34,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:26:34,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:26:34,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:26:34,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (1/1) ... [2021-11-25 18:26:34,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:26:35,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:35,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:26:35,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:26:35,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:26:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:26:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:26:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:26:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:26:35,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:26:35,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:26:35,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:26:35,157 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:26:35,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:26:35,378 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:26:35,439 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:26:35,443 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-25 18:26:35,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:35 BoogieIcfgContainer [2021-11-25 18:26:35,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:26:35,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:26:35,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:26:35,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:26:35,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:26:34" (1/3) ... [2021-11-25 18:26:35,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387891a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:35, skipping insertion in model container [2021-11-25 18:26:35,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:34" (2/3) ... [2021-11-25 18:26:35,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387891a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:35, skipping insertion in model container [2021-11-25 18:26:35,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:35" (3/3) ... [2021-11-25 18:26:35,458 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2021-11-25 18:26:35,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:26:35,464 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:26:35,531 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:26:35,539 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 [2021-11-25 18:26:35,539 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:26:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:26:35,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:35,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:35,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2091368047, now seen corresponding path program 1 times [2021-11-25 18:26:35,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:35,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221380468] [2021-11-25 18:26:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:35,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:35,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:35,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221380468] [2021-11-25 18:26:35,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221380468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:35,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:35,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:26:35,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133528337] [2021-11-25 18:26:35,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:35,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:26:35,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:26:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:26:35,953 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:36,080 INFO L93 Difference]: Finished difference Result 36 states and 61 transitions. [2021-11-25 18:26:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:26:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:26:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:36,094 INFO L225 Difference]: With dead ends: 36 [2021-11-25 18:26:36,094 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:26:36,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:26:36,115 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:36,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:26:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:26:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 18:26:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-25 18:26:36,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 12 [2021-11-25 18:26:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:36,158 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-25 18:26:36,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-25 18:26:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:26:36,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:36,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:26:36,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash -485558467, now seen corresponding path program 1 times [2021-11-25 18:26:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:36,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181519844] [2021-11-25 18:26:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:36,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:26:36,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181519844] [2021-11-25 18:26:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181519844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422589182] [2021-11-25 18:26:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:36,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:36,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:36,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:26:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:36,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:26:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:26:36,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:26:36,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422589182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65842814] [2021-11-25 18:26:36,652 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:26:36,652 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:36,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:36,682 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:36,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:36,846 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:26:36,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:26:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:36,907 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:26:36,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:26:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:36,970 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 26 treesize of output 28 [2021-11-25 18:26:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:37,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:26:37,137 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:26:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 181 treesize of output 184 [2021-11-25 18:26:37,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:37,391 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:37,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:37,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:37,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:37,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:37,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:37,741 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:37,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:37,894 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:37,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:37,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:38,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:38,101 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:38,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:38,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:38,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:38,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '242#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem2#1| 48) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:26:38,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:38,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:38,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 18:26:38,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325726717] [2021-11-25 18:26:38,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:38,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:26:38,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:26:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:26:38,340 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:38,456 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2021-11-25 18:26:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:26:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:26:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:38,458 INFO L225 Difference]: With dead ends: 65 [2021-11-25 18:26:38,458 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 18:26:38,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:26:38,460 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:38,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:26:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 18:26:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-25 18:26:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-25 18:26:38,470 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 20 [2021-11-25 18:26:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:38,470 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-25 18:26:38,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-25 18:26:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:26:38,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:38,473 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:38,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:38,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 18:26:38,704 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash -807884655, now seen corresponding path program 2 times [2021-11-25 18:26:38,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:38,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101156105] [2021-11-25 18:26:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:38,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:26:38,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:38,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101156105] [2021-11-25 18:26:38,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101156105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287177317] [2021-11-25 18:26:38,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:26:38,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:38,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:38,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:38,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:26:39,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:26:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:26:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:26:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:26:39,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:26:39,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287177317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [826188314] [2021-11-25 18:26:39,404 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:26:39,404 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:39,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:39,405 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:39,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:39,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,444 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:26:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:26:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,468 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:26:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:26:39,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,491 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 31 treesize of output 33 [2021-11-25 18:26:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,554 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:26:39,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 183 [2021-11-25 18:26:39,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:39,730 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:39,815 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:39,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:39,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:39,904 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:39,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:40,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:40,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:40,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:40,164 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:40,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '725#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem2#1| 48) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:26:40,250 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:40,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:40,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-25 18:26:40,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136232162] [2021-11-25 18:26:40,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:40,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:26:40,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:26:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:26:40,254 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:40,574 INFO L93 Difference]: Finished difference Result 134 states and 197 transitions. [2021-11-25 18:26:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:26:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 18:26:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:40,576 INFO L225 Difference]: With dead ends: 134 [2021-11-25 18:26:40,576 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 18:26:40,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:26:40,578 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:40,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:26:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 18:26:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-25 18:26:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-11-25 18:26:40,592 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 44 [2021-11-25 18:26:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:40,592 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-11-25 18:26:40,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-11-25 18:26:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 18:26:40,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:40,596 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:40,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:40,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:40,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:40,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1590144239, now seen corresponding path program 3 times [2021-11-25 18:26:40,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:40,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631083924] [2021-11-25 18:26:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:40,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-25 18:26:41,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631083924] [2021-11-25 18:26:41,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631083924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869550905] [2021-11-25 18:26:41,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:26:41,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:41,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:41,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:26:41,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:26:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:26:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:26:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-25 18:26:41,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-25 18:26:41,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869550905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178987315] [2021-11-25 18:26:41,920 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:26:41,920 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:41,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:41,920 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:41,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:41,954 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:26:41,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:26:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-25 18:26:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:41,982 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 31 treesize of output 33 [2021-11-25 18:26:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,055 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:26:42,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 183 [2021-11-25 18:26:42,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:42,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:42,563 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:42,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1742#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem2#1| 48) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:26:42,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:42,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:42,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-25 18:26:42,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795896238] [2021-11-25 18:26:42,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:42,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:26:42,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:26:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:26:42,711 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:43,354 INFO L93 Difference]: Finished difference Result 272 states and 383 transitions. [2021-11-25 18:26:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:26:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 18:26:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:43,363 INFO L225 Difference]: With dead ends: 272 [2021-11-25 18:26:43,363 INFO L226 Difference]: Without dead ends: 190 [2021-11-25 18:26:43,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:26:43,373 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:43,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:26:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-25 18:26:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-25 18:26:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0476190476190477) internal successors, (198), 189 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 198 transitions. [2021-11-25 18:26:43,419 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 198 transitions. Word has length 92 [2021-11-25 18:26:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:43,420 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 198 transitions. [2021-11-25 18:26:43,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 198 transitions. [2021-11-25 18:26:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-25 18:26:43,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:43,431 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:43,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:43,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:43,632 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -535541743, now seen corresponding path program 4 times [2021-11-25 18:26:43,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:43,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551448630] [2021-11-25 18:26:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:43,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2021-11-25 18:26:44,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551448630] [2021-11-25 18:26:44,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551448630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077644856] [2021-11-25 18:26:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:26:44,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:44,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:44,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:26:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:26:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2021-11-25 18:26:45,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2021-11-25 18:26:46,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077644856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:46,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171641451] [2021-11-25 18:26:46,366 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:26:46,366 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:46,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:46,367 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:46,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:46,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,393 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:26:46,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:26:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,424 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:26:46,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:26:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,455 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 26 treesize of output 28 [2021-11-25 18:26:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:26:46,558 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:26:46,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 181 treesize of output 184 [2021-11-25 18:26:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:46,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:46,751 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:46,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:46,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:46,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:26:46,995 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 18:26:46,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 18:26:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:47,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:47,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-11-25 18:26:47,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:26:47,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:47,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3827#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem2#1| 48) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:26:47,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:47,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:47,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-25 18:26:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142673955] [2021-11-25 18:26:47,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:47,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 18:26:47,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 18:26:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 18:26:47,799 INFO L87 Difference]: Start difference. First operand 190 states and 198 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:49,107 INFO L93 Difference]: Finished difference Result 548 states and 755 transitions. [2021-11-25 18:26:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:26:49,108 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-25 18:26:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:49,111 INFO L225 Difference]: With dead ends: 548 [2021-11-25 18:26:49,111 INFO L226 Difference]: Without dead ends: 382 [2021-11-25 18:26:49,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 512 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 18:26:49,114 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1352 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:49,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1352 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:26:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-25 18:26:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-25 18:26:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.0236220472440944) internal successors, (390), 381 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 390 transitions. [2021-11-25 18:26:49,150 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 390 transitions. Word has length 188 [2021-11-25 18:26:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:49,150 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 390 transitions. [2021-11-25 18:26:49,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:26:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 390 transitions. [2021-11-25 18:26:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-25 18:26:49,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:49,160 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:49,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:49,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:49,382 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash 884912657, now seen corresponding path program 5 times [2021-11-25 18:26:49,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:49,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962182353] [2021-11-25 18:26:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:49,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8648 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7567 trivial. 0 not checked. [2021-11-25 18:26:51,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962182353] [2021-11-25 18:26:51,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962182353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:51,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671648766] [2021-11-25 18:26:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:26:51,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:51,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:51,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08220529-1324-4a41-8ab9-08a8187e6e16/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process