./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.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_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/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_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/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_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:27:05,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:27:05,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:27:06,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:27:06,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:27:06,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:27:06,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:27:06,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:27:06,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:27:06,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:27:06,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:27:06,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:27:06,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:27:06,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:27:06,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:27:06,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:27:06,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:27:06,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:27:06,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:27:06,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:27:06,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:27:06,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:27:06,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:27:06,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:27:06,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:27:06,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:27:06,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:27:06,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:27:06,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:27:06,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:27:06,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:27:06,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:27:06,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:27:06,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:27:06,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:27:06,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:27:06,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:27:06,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:27:06,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:27:06,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:27:06,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:27:06,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:27:06,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:27:06,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:27:06,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:27:06,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:27:06,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:27:06,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:27:06,142 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:27:06,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:27:06,143 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:27:06,143 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:27:06,143 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:27:06,143 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:27:06,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:27:06,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:27:06,144 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:27:06,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:27:06,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:27:06,145 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:27:06,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:27:06,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:27:06,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:27:06,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:27:06,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:27:06,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:27:06,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:27:06,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:27:06,147 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:27:06,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:27:06,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:27:06,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:27:06,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:27:06,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:27:06,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:27:06,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:27:06,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:27:06,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:27:06,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:27:06,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:27:06,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:27:06,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:27:06,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:27:06,151 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_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2021-11-25 20:27:06,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:27:06,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:27:06,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:27:06,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:27:06,441 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:27:06,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loops/n.c24.i [2021-11-25 20:27:06,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/data/53221d57f/e288a896b79d4bdab030e1a3e54d4069/FLAG343a15334 [2021-11-25 20:27:07,045 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:27:07,046 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/sv-benchmarks/c/loops/n.c24.i [2021-11-25 20:27:07,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/data/53221d57f/e288a896b79d4bdab030e1a3e54d4069/FLAG343a15334 [2021-11-25 20:27:07,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/data/53221d57f/e288a896b79d4bdab030e1a3e54d4069 [2021-11-25 20:27:07,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:27:07,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:27:07,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:27:07,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:27:07,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:27:07,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58eaeffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07, skipping insertion in model container [2021-11-25 20:27:07,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:27:07,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:27:07,624 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_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/sv-benchmarks/c/loops/n.c24.i[805,818] [2021-11-25 20:27:07,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:27:07,683 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:27:07,696 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_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/sv-benchmarks/c/loops/n.c24.i[805,818] [2021-11-25 20:27:07,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:27:07,737 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:27:07,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07 WrapperNode [2021-11-25 20:27:07,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:27:07,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:27:07,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:27:07,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:27:07,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,786 INFO L137 Inliner]: procedures = 68, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 146 [2021-11-25 20:27:07,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:27:07,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:27:07,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:27:07,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:27:07,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:27:07,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:27:07,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:27:07,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:27:07,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (1/1) ... [2021-11-25 20:27:07,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:27:07,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:07,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:27:07,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:27:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:27:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:27:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:27:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:27:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:27:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:27:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:27:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:27:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:27:07,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:27:08,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:27:08,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:27:08,281 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:27:08,372 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:27:08,372 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:27:08,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:27:08 BoogieIcfgContainer [2021-11-25 20:27:08,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:27:08,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:27:08,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:27:08,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:27:08,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:27:07" (1/3) ... [2021-11-25 20:27:08,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309692f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:27:08, skipping insertion in model container [2021-11-25 20:27:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:27:07" (2/3) ... [2021-11-25 20:27:08,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309692f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:27:08, skipping insertion in model container [2021-11-25 20:27:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:27:08" (3/3) ... [2021-11-25 20:27:08,395 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2021-11-25 20:27:08,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:27:08,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:27:08,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:27:08,481 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 20:27:08,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:27:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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 20:27:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:27:08,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:08,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:27:08,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 155056323, now seen corresponding path program 1 times [2021-11-25 20:27:08,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:08,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507482494] [2021-11-25 20:27:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:08,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:08,756 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 20:27:08,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:08,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507482494] [2021-11-25 20:27:08,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507482494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:08,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:08,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:27:08,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589599110] [2021-11-25 20:27:08,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:08,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:08,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:08,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:08,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:08,802 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 20:27:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:08,874 INFO L93 Difference]: Finished difference Result 59 states and 93 transitions. [2021-11-25 20:27:08,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 20:27:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:08,886 INFO L225 Difference]: With dead ends: 59 [2021-11-25 20:27:08,886 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:27:08,890 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 20:27:08,894 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:08,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:27:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:27:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2021-11-25 20:27:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 20:27:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-11-25 20:27:08,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 5 [2021-11-25 20:27:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:08,935 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-25 20:27:08,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 20:27:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-11-25 20:27:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:27:08,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:08,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:08,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:27:08,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1526546639, now seen corresponding path program 1 times [2021-11-25 20:27:08,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:08,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461853425] [2021-11-25 20:27:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:08,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:27:09,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461853425] [2021-11-25 20:27:09,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461853425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651421712] [2021-11-25 20:27:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:09,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:09,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:09,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:09,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:27:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:27:09,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:27:09,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:27:09,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651421712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668718553] [2021-11-25 20:27:09,214 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:27:09,215 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:09,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:09,231 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:09,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:09,426 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:27:09,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:27:09,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:27:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-25 20:27:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:09,801 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-25 20:27:09,802 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 272 treesize of output 269 [2021-11-25 20:27:09,945 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 27 treesize of output 23 [2021-11-25 20:27:10,245 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:10,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:10,739 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:10,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:10,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 20:27:10,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686839180] [2021-11-25 20:27:10,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:10,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:27:10,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:27:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:27:10,742 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:10,882 INFO L93 Difference]: Finished difference Result 84 states and 121 transitions. [2021-11-25 20:27:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:27:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:27:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:10,886 INFO L225 Difference]: With dead ends: 84 [2021-11-25 20:27:10,886 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 20:27:10,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:27:10,891 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:10,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 73 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:27:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 20:27:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-25 20:27:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.4) internal successors, (91), 65 states have internal predecessors, (91), 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 20:27:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2021-11-25 20:27:10,924 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 10 [2021-11-25 20:27:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:10,925 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2021-11-25 20:27:10,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2021-11-25 20:27:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:27:10,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:10,928 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 20:27:10,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:11,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash 106849547, now seen corresponding path program 2 times [2021-11-25 20:27:11,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:11,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503791209] [2021-11-25 20:27:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:11,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:27:11,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503791209] [2021-11-25 20:27:11,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503791209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:11,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:11,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:27:11,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949986418] [2021-11-25 20:27:11,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:11,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:27:11,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:27:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:27:11,332 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 20:27:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:11,404 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2021-11-25 20:27:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:27:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 25 [2021-11-25 20:27:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:11,409 INFO L225 Difference]: With dead ends: 123 [2021-11-25 20:27:11,409 INFO L226 Difference]: Without dead ends: 120 [2021-11-25 20:27:11,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:27:11,413 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:11,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:27:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-25 20:27:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 67. [2021-11-25 20:27:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 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 20:27:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2021-11-25 20:27:11,432 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 25 [2021-11-25 20:27:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:11,435 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2021-11-25 20:27:11,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 20:27:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2021-11-25 20:27:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 20:27:11,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:11,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:11,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:27:11,439 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2138311154, now seen corresponding path program 1 times [2021-11-25 20:27:11,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:11,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314861564] [2021-11-25 20:27:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:11,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:27:11,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:11,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314861564] [2021-11-25 20:27:11,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314861564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465323800] [2021-11-25 20:27:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:11,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:11,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:11,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:27:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:27:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:27:11,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 20:27:11,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465323800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:11,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887728663] [2021-11-25 20:27:11,842 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:27:11,842 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:11,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:11,843 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:11,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:11,918 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:27:11,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:27:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:11,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:27:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 20:27:12,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:12,096 INFO L354 Elim1Store]: treesize reduction 125, result has 17.2 percent of original size [2021-11-25 20:27:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 269 treesize of output 270 [2021-11-25 20:27:12,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 20:27:12,284 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 20:27:12,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:12,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:12,497 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:12,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:12,693 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 20:27:12,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:27:12,834 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:12,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:12,941 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:12,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:13,124 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 20:27:13,220 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 20:27:13,269 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:13,377 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:13,555 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 20:27:13,687 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 20:27:13,710 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:14,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '913#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:14,658 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:14,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-25 20:27:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958776296] [2021-11-25 20:27:14,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:14,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:27:14,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:27:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:27:14,661 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20:27:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:14,871 INFO L93 Difference]: Finished difference Result 231 states and 336 transitions. [2021-11-25 20:27:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:27:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 29 [2021-11-25 20:27:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:14,882 INFO L225 Difference]: With dead ends: 231 [2021-11-25 20:27:14,882 INFO L226 Difference]: Without dead ends: 170 [2021-11-25 20:27:14,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:27:14,890 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 342 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:14,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 153 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:27:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-25 20:27:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2021-11-25 20:27:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4038461538461537) internal successors, (219), 156 states have internal predecessors, (219), 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 20:27:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 219 transitions. [2021-11-25 20:27:14,914 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 219 transitions. Word has length 29 [2021-11-25 20:27:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:14,914 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 219 transitions. [2021-11-25 20:27:14,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 20:27:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 219 transitions. [2021-11-25 20:27:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 20:27:14,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:14,918 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:14,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:15,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:15,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -322976646, now seen corresponding path program 2 times [2021-11-25 20:27:15,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:15,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171333200] [2021-11-25 20:27:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:15,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-25 20:27:15,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:15,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171333200] [2021-11-25 20:27:15,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171333200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:15,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012025813] [2021-11-25 20:27:15,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:27:15,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:15,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:15,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:15,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:27:15,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:27:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:27:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:27:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-25 20:27:15,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-25 20:27:15,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012025813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168285219] [2021-11-25 20:27:15,774 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:27:15,775 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:15,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:15,775 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:15,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,816 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 20:27:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 20:27:15,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,869 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:27:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:27:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 20:27:15,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:16,019 INFO L354 Elim1Store]: treesize reduction 125, result has 17.2 percent of original size [2021-11-25 20:27:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 269 treesize of output 270 [2021-11-25 20:27:16,135 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 27 treesize of output 23 [2021-11-25 20:27:16,162 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 20:27:16,201 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:16,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:16,306 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:16,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:16,493 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 11 treesize of output 7 [2021-11-25 20:27:16,585 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 20:27:16,620 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:16,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:16,714 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:16,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:16,874 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 20:27:16,957 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 20:27:16,996 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:17,094 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:17,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:17,256 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 20:27:17,328 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 20:27:17,422 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:18,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1887#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:18,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:18,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:18,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2021-11-25 20:27:18,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426913626] [2021-11-25 20:27:18,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:18,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 20:27:18,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 20:27:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:27:18,438 INFO L87 Difference]: Start difference. First operand 157 states and 219 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:20,663 INFO L93 Difference]: Finished difference Result 850 states and 1220 transitions. [2021-11-25 20:27:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-25 20:27:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-25 20:27:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:20,669 INFO L225 Difference]: With dead ends: 850 [2021-11-25 20:27:20,669 INFO L226 Difference]: Without dead ends: 702 [2021-11-25 20:27:20,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2159, Invalid=7543, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 20:27:20,676 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3738 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3738 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:20,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3738 Valid, 223 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:27:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-25 20:27:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 205. [2021-11-25 20:27:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4264705882352942) internal successors, (291), 204 states have internal predecessors, (291), 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 20:27:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 291 transitions. [2021-11-25 20:27:20,724 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 291 transitions. Word has length 59 [2021-11-25 20:27:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:20,725 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 291 transitions. [2021-11-25 20:27:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:27:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 291 transitions. [2021-11-25 20:27:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:27:20,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:20,729 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 20:27:20,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:20,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:20,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1548030479, now seen corresponding path program 3 times [2021-11-25 20:27:20,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:20,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324107234] [2021-11-25 20:27:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:20,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-25 20:27:21,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:21,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324107234] [2021-11-25 20:27:21,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324107234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891794371] [2021-11-25 20:27:21,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:27:21,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:21,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:21,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:27:21,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:27:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:27:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:27:21,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-25 20:27:21,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-25 20:27:21,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891794371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:21,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1274574081] [2021-11-25 20:27:21,767 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:27:21,767 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:21,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:21,768 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:21,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:21,823 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:27:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:27:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:21,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:27:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:21,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 20:27:21,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:21,972 INFO L354 Elim1Store]: treesize reduction 125, result has 17.2 percent of original size [2021-11-25 20:27:21,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 269 treesize of output 270 [2021-11-25 20:27:22,112 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 27 treesize of output 23 [2021-11-25 20:27:22,144 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 20:27:22,181 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:22,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:22,275 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:22,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:22,450 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 20:27:22,567 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 20:27:22,644 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:22,727 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 20:27:22,804 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 20:27:22,840 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:22,932 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:22,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:23,093 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 20:27:23,203 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 20:27:23,242 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:23,331 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:23,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:23,478 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 20:27:23,545 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 20:27:23,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:24,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4151#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:24,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:24,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:24,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2021-11-25 20:27:24,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646362823] [2021-11-25 20:27:24,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:24,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 20:27:24,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 20:27:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:27:24,420 INFO L87 Difference]: Start difference. First operand 205 states and 291 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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 20:27:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:24,870 INFO L93 Difference]: Finished difference Result 1048 states and 1570 transitions. [2021-11-25 20:27:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 20:27:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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 76 [2021-11-25 20:27:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:24,877 INFO L225 Difference]: With dead ends: 1048 [2021-11-25 20:27:24,877 INFO L226 Difference]: Without dead ends: 856 [2021-11-25 20:27:24,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:27:24,884 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1367 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:24,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 320 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:27:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-25 20:27:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 400. [2021-11-25 20:27:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.413533834586466) internal successors, (564), 399 states have internal predecessors, (564), 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 20:27:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2021-11-25 20:27:24,962 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 76 [2021-11-25 20:27:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:24,964 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2021-11-25 20:27:24,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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 20:27:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2021-11-25 20:27:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 20:27:24,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:24,981 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 20:27:25,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:25,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:27:25,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1224299137, now seen corresponding path program 4 times [2021-11-25 20:27:25,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:25,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085996820] [2021-11-25 20:27:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:25,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-11-25 20:27:25,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085996820] [2021-11-25 20:27:25,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085996820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250647358] [2021-11-25 20:27:25,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:27:25,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:25,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:25,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:27:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:27:25,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-11-25 20:27:26,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-11-25 20:27:27,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250647358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:27,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337105961] [2021-11-25 20:27:27,070 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:27:27,070 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:27,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:27,070 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:27,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:27,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:27,129 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:27:27,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:27:27,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:27,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:27:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-25 20:27:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:27,277 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-25 20:27:27,278 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 272 treesize of output 269 [2021-11-25 20:27:27,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 20:27:27,363 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 20:27:27,402 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:27,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:27,499 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:27,657 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 20:27:27,744 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 20:27:27,772 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:27,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:27,889 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:27,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:28,048 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 20:27:28,144 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 20:27:28,199 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:28,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:28,287 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:28,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:28,434 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 20:27:28,579 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 20:27:28,600 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:29,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7285#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:29,510 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:29,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:29,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2021-11-25 20:27:29,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550894357] [2021-11-25 20:27:29,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:29,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 20:27:29,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 20:27:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1409, Invalid=2373, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 20:27:29,514 INFO L87 Difference]: Start difference. First operand 400 states and 564 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 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 20:27:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:30,894 INFO L93 Difference]: Finished difference Result 2075 states and 3104 transitions. [2021-11-25 20:27:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-25 20:27:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 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 141 [2021-11-25 20:27:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:30,906 INFO L225 Difference]: With dead ends: 2075 [2021-11-25 20:27:30,906 INFO L226 Difference]: Without dead ends: 1701 [2021-11-25 20:27:30,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1409, Invalid=2373, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 20:27:30,910 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3097 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:30,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3097 Valid, 677 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:27:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-11-25 20:27:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 790. [2021-11-25 20:27:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.4068441064638784) internal successors, (1110), 789 states have internal predecessors, (1110), 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 20:27:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1110 transitions. [2021-11-25 20:27:30,994 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1110 transitions. Word has length 141 [2021-11-25 20:27:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:30,994 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1110 transitions. [2021-11-25 20:27:30,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 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 20:27:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1110 transitions. [2021-11-25 20:27:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-25 20:27:31,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:31,004 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 20:27:31,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:27:31,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:27:31,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1747851091, now seen corresponding path program 5 times [2021-11-25 20:27:31,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727668951] [2021-11-25 20:27:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:31,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2021-11-25 20:27:32,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727668951] [2021-11-25 20:27:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727668951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:27:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280755792] [2021-11-25 20:27:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:27:32,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:27:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:27:32,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:27:32,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:27:32,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:27:32,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:27:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:27:32,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:27:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2021-11-25 20:27:33,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:27:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2021-11-25 20:27:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280755792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:27:34,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482024747] [2021-11-25 20:27:34,243 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:27:34,244 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:27:34,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:27:34,244 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:27:34,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:27:34,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:34,304 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:27:34,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:27:34,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:34,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:27:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:34,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-25 20:27:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:27:34,439 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-25 20:27:34,439 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 272 treesize of output 269 [2021-11-25 20:27:34,493 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 27 treesize of output 23 [2021-11-25 20:27:34,522 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 20:27:34,583 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:34,685 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:34,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:34,872 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 20:27:34,974 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 20:27:35,033 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:35,104 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 20:27:35,185 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 20:27:35,218 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:35,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:35,310 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:35,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:27:35,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:27:35,587 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 20:27:35,635 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:27:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:27:35,723 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:27:35,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:27:35,873 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 20:27:35,951 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 20:27:36,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:37,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13396#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:27:37,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:27:37,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:27:37,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 66 [2021-11-25 20:27:37,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071163468] [2021-11-25 20:27:37,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:27:37,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 20:27:37,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 20:27:37,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4067, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 20:27:37,447 INFO L87 Difference]: Start difference. First operand 790 states and 1110 transitions. Second operand has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 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 20:29:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:20,420 INFO L93 Difference]: Finished difference Result 7850 states and 11356 transitions. [2021-11-25 20:29:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 834 states. [2021-11-25 20:29:20,420 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 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 271 [2021-11-25 20:29:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:20,459 INFO L225 Difference]: With dead ends: 7850 [2021-11-25 20:29:20,460 INFO L226 Difference]: Without dead ends: 7106 [2021-11-25 20:29:20,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1945 GetRequests, 1096 SyntacticMatches, 1 SemanticMatches, 848 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329833 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=169261, Invalid=552389, Unknown=0, NotChecked=0, Total=721650 [2021-11-25 20:29:20,509 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49899 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 5932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49899 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 6549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5932 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:20,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49899 Valid, 777 Invalid, 6549 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5932 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 20:29:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2021-11-25 20:29:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 871. [2021-11-25 20:29:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 1.4172413793103449) internal successors, (1233), 870 states have internal predecessors, (1233), 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 20:29:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1233 transitions. [2021-11-25 20:29:20,669 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1233 transitions. Word has length 271 [2021-11-25 20:29:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:20,670 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 1233 transitions. [2021-11-25 20:29:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 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 20:29:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1233 transitions. [2021-11-25 20:29:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-25 20:29:20,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:20,676 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 20:29:20,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:29:20,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:29:20,890 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -957412781, now seen corresponding path program 6 times [2021-11-25 20:29:20,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499478275] [2021-11-25 20:29:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:20,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 5841 trivial. 0 not checked. [2021-11-25 20:29:22,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499478275] [2021-11-25 20:29:22,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499478275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:29:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188268697] [2021-11-25 20:29:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:29:22,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:22,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:22,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:29:22,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:29:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:29:22,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 20:29:22,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 5651 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2021-11-25 20:29:23,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:29:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 5651 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2021-11-25 20:29:26,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188268697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:29:26,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630591523] [2021-11-25 20:29:26,260 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:29:26,261 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:29:26,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:29:26,261 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:29:26,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:29:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:26,300 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 20:29:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 20:29:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:26,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:26,338 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:29:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:29:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:26,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 20:29:26,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:26,472 INFO L354 Elim1Store]: treesize reduction 125, result has 17.2 percent of original size [2021-11-25 20:29:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 269 treesize of output 270 [2021-11-25 20:29:26,563 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 27 treesize of output 23 [2021-11-25 20:29:26,590 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 20:29:26,624 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:26,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:26,709 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:29:26,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:29:26,844 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 20:29:26,926 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 20:29:26,962 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:27,050 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:29:27,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:29:27,177 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 20:29:27,242 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 20:29:27,287 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:27,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:27,363 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:29:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:29:27,493 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 11 treesize of output 7 [2021-11-25 20:29:27,580 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 20:29:27,593 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:29:28,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30505#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:29:28,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:29:28,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:29:28,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 107 [2021-11-25 20:29:28,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939286796] [2021-11-25 20:29:28,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:29:28,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-25 20:29:28,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-25 20:29:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5702, Invalid=7638, Unknown=0, NotChecked=0, Total=13340 [2021-11-25 20:29:28,600 INFO L87 Difference]: Start difference. First operand 871 states and 1233 transitions. Second operand has 107 states, 107 states have (on average 4.542056074766355) internal successors, (486), 107 states have internal predecessors, (486), 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 20:29:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:35,714 INFO L93 Difference]: Finished difference Result 7838 states and 11900 transitions. [2021-11-25 20:29:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-25 20:29:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.542056074766355) internal successors, (486), 107 states have internal predecessors, (486), 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 300 [2021-11-25 20:29:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:35,743 INFO L225 Difference]: With dead ends: 7838 [2021-11-25 20:29:35,743 INFO L226 Difference]: Without dead ends: 7020 [2021-11-25 20:29:35,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5702, Invalid=7638, Unknown=0, NotChecked=0, Total=13340 [2021-11-25 20:29:35,748 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6351 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6351 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:35,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6351 Valid, 1366 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:29:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2021-11-25 20:29:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 1666. [2021-11-25 20:29:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 1.409009009009009) internal successors, (2346), 1665 states have internal predecessors, (2346), 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 20:29:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2346 transitions. [2021-11-25 20:29:36,059 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2346 transitions. Word has length 300 [2021-11-25 20:29:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:36,059 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 2346 transitions. [2021-11-25 20:29:36,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.542056074766355) internal successors, (486), 107 states have internal predecessors, (486), 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 20:29:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2346 transitions. [2021-11-25 20:29:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2021-11-25 20:29:36,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:36,077 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 20:29:36,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 20:29:36,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:36,302 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1727631025, now seen corresponding path program 7 times [2021-11-25 20:29:36,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:36,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068435803] [2021-11-25 20:29:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:36,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2021-11-25 20:29:40,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:40,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068435803] [2021-11-25 20:29:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068435803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:29:40,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816636805] [2021-11-25 20:29:40,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:29:40,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:40,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:40,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:40,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:29:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-25 20:29:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2021-11-25 20:29:42,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:29:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2021-11-25 20:29:53,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816636805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:29:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433171993] [2021-11-25 20:29:53,247 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:29:53,247 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:29:53,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:29:53,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:29:53,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:29:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:53,300 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 20:29:53,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 20:29:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:53,348 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:29:53,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:29:53,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:53,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-25 20:29:53,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:29:53,447 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-25 20:29:53,448 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 272 treesize of output 269 [2021-11-25 20:29:53,483 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 27 treesize of output 23 [2021-11-25 20:29:53,507 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 20:29:53,539 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:53,615 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:29:53,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:29:53,788 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 20:29:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:29:53,938 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:54,011 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 20:29:54,074 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 20:29:54,101 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:54,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:54,178 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:29:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:29:54,319 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 20:29:54,397 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 20:29:54,429 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:29:54,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:29:54,514 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:29:54,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2021-11-25 20:29:54,633 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 20:29:54,681 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 20:29:54,900 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:29:56,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48775#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:29:56,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:29:56,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:29:56,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2021-11-25 20:29:56,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664989711] [2021-11-25 20:29:56,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:29:56,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2021-11-25 20:29:56,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2021-11-25 20:29:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22609, Invalid=26453, Unknown=0, NotChecked=0, Total=49062 [2021-11-25 20:29:56,277 INFO L87 Difference]: Start difference. First operand 1666 states and 2346 transitions. Second operand has 213 states, 213 states have (on average 1.056338028169014) internal successors, (225), 212 states have internal predecessors, (225), 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 20:31:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:18,495 INFO L93 Difference]: Finished difference Result 15523 states and 23560 transitions. [2021-11-25 20:31:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-11-25 20:31:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.056338028169014) internal successors, (225), 212 states have internal predecessors, (225), 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 565 [2021-11-25 20:31:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:18,546 INFO L225 Difference]: With dead ends: 15523 [2021-11-25 20:31:18,546 INFO L226 Difference]: Without dead ends: 13963 [2021-11-25 20:31:18,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1799 GetRequests, 1579 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3267 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=22609, Invalid=26453, Unknown=0, NotChecked=0, Total=49062 [2021-11-25 20:31:18,554 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17290 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 1128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17290 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:18,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17290 Valid, 2761 Invalid, 2829 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1128 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:31:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-11-25 20:31:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 3256. [2021-11-25 20:31:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3255 states have (on average 1.4046082949308756) internal successors, (4572), 3255 states have internal predecessors, (4572), 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 20:31:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 4572 transitions. [2021-11-25 20:31:19,178 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 4572 transitions. Word has length 565 [2021-11-25 20:31:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:19,179 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 4572 transitions. [2021-11-25 20:31:19,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.056338028169014) internal successors, (225), 212 states have internal predecessors, (225), 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 20:31:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 4572 transitions. [2021-11-25 20:31:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2021-11-25 20:31:19,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:19,195 INFO L514 BasicCegarLoop]: trace histogram [210, 210, 210, 210, 210, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 20:31:19,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:19,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:31:19,398 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1693807141, now seen corresponding path program 8 times [2021-11-25 20:31:19,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651149335] [2021-11-25 20:31:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:19,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 90270 trivial. 0 not checked. [2021-11-25 20:31:35,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651149335] [2021-11-25 20:31:35,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651149335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976777982] [2021-11-25 20:31:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:31:35,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:35,422 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:35,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ddf56d1-9f60-4b42-8ccb-a4b42c398ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:31:37,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-25 20:31:37,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:31:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:31:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 2509 proven. 190 refuted. 0 times theorem prover too weak. 109726 trivial. 0 not checked. [2021-11-25 20:31:39,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 2509 proven. 190 refuted. 0 times theorem prover too weak. 109726 trivial. 0 not checked. [2021-11-25 20:31:42,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976777982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349377035] [2021-11-25 20:31:42,731 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 20:31:42,731 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:31:42,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:31:42,731 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:31:42,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:31:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:42,775 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-25 20:31:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2021-11-25 20:31:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:42,823 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:31:42,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:31:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-25 20:31:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:42,922 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-25 20:31:42,922 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 272 treesize of output 269 [2021-11-25 20:31:42,972 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 27 treesize of output 23 [2021-11-25 20:31:43,002 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 20:31:43,037 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:31:43,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:31:43,124 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:31:43,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:31:43,259 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 20:31:43,336 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 20:31:43,374 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:31:43,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:31:43,464 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:31:43,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:31:43,728 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 20:31:43,794 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 20:31:43,840 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 20:31:43,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:31:43,927 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 20:31:43,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2021-11-25 20:31:44,063 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 20:31:44,127 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 20:31:44,182 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:31:46,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84560#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:31:46,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:31:46,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:31:46,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [212, 15, 15] total 238 [2021-11-25 20:31:46,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445471510] [2021-11-25 20:31:46,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:31:46,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 238 states [2021-11-25 20:31:46,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2021-11-25 20:31:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22893, Invalid=37869, Unknown=0, NotChecked=0, Total=60762 [2021-11-25 20:31:46,265 INFO L87 Difference]: Start difference. First operand 3256 states and 4572 transitions. Second operand has 238 states, 238 states have (on average 1.3319327731092436) internal successors, (317), 238 states have internal predecessors, (317), 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)