./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 495094a11c21f00136d2d1dc803d67f4b0e9f0825a0b561680c3923e1996fa21 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:44:36,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:44:36,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:44:36,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:44:36,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:44:36,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:44:36,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:44:36,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:44:36,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:44:36,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:44:36,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:44:36,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:44:36,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:44:36,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:44:36,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:44:36,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:44:36,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:44:36,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:44:36,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:44:36,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:44:36,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:44:36,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:44:36,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:44:36,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:44:36,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:44:36,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:44:36,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:44:36,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:44:36,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:44:36,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:44:36,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:44:36,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:44:36,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:44:36,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:44:36,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:44:36,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:44:36,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:44:36,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:44:36,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:44:36,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:44:36,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:44:36,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:44:36,292 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:44:36,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:44:36,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:44:36,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:44:36,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:44:36,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:44:36,295 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:44:36,296 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:44:36,296 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:44:36,296 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:44:36,297 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:44:36,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:44:36,298 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:44:36,298 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:44:36,298 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:44:36,299 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:44:36,299 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:44:36,299 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:44:36,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:44:36,300 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:44:36,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:44:36,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:44:36,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:44:36,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:44:36,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:44:36,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:44:36,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:44:36,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:44:36,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:44:36,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:44:36,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:44:36,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:44:36,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:44:36,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:44:36,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:44:36,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:44:36,306 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:44:36,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:44:36,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:44:36,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:44:36,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:44:36,307 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_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 495094a11c21f00136d2d1dc803d67f4b0e9f0825a0b561680c3923e1996fa21 [2021-11-20 23:44:36,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:44:36,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:44:36,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:44:36,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:44:36,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:44:36,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i [2021-11-20 23:44:36,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/data/4731da00b/4cba5edad94947528f3fe1d91dc0bef0/FLAG76e780cc0 [2021-11-20 23:44:37,166 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:44:37,167 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i [2021-11-20 23:44:37,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/data/4731da00b/4cba5edad94947528f3fe1d91dc0bef0/FLAG76e780cc0 [2021-11-20 23:44:37,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/data/4731da00b/4cba5edad94947528f3fe1d91dc0bef0 [2021-11-20 23:44:37,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:44:37,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:44:37,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:44:37,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:44:37,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:44:37,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f58b375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37, skipping insertion in model container [2021-11-20 23:44:37,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:44:37,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:44:37,803 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_ff664b35-5e79-4432-8b39-3af0c72ff97a/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i[823,836] [2021-11-20 23:44:37,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:44:37,833 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:44:37,856 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_ff664b35-5e79-4432-8b39-3af0c72ff97a/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i[823,836] [2021-11-20 23:44:37,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:44:37,890 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:44:37,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37 WrapperNode [2021-11-20 23:44:37,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:44:37,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:44:37,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:44:37,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:44:37,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,950 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-11-20 23:44:37,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:44:37,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:44:37,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:44:37,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:44:37,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:44:37,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:44:37,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:44:37,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:44:37,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (1/1) ... [2021-11-20 23:44:37,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:44:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:44:38,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:44:38,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:44:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:44:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:44:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:44:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:44:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:44:38,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:44:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:44:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:44:38,121 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:44:38,123 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:44:38,234 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:44:38,263 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:44:38,263 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 23:44:38,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:44:38 BoogieIcfgContainer [2021-11-20 23:44:38,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:44:38,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:44:38,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:44:38,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:44:38,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:44:37" (1/3) ... [2021-11-20 23:44:38,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d818059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:44:38, skipping insertion in model container [2021-11-20 23:44:38,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:44:37" (2/3) ... [2021-11-20 23:44:38,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d818059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:44:38, skipping insertion in model container [2021-11-20 23:44:38,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:44:38" (3/3) ... [2021-11-20 23:44:38,302 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2021-11-20 23:44:38,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:44:38,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:44:38,373 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:44:38,380 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 [2021-11-20 23:44:38,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:44:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:44:38,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:38,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:38,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash 181503759, now seen corresponding path program 1 times [2021-11-20 23:44:38,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053914240] [2021-11-20 23:44:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:38,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:44:38,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053914240] [2021-11-20 23:44:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053914240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:38,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:38,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:44:38,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524059744] [2021-11-20 23:44:38,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:38,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:44:38,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:44:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:44:38,664 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:38,731 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2021-11-20 23:44:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:44:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:44:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:38,742 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:44:38,743 INFO L226 Difference]: Without dead ends: 12 [2021-11-20 23:44:38,746 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 [2021-11-20 23:44:38,756 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:38,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:44:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-20 23:44:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-20 23:44:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-11-20 23:44:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-20 23:44:38,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2021-11-20 23:44:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:38,837 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-20 23:44:38,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-20 23:44:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:44:38,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:38,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:38,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:44:38,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:38,840 INFO L85 PathProgramCache]: Analyzing trace with hash -250116685, now seen corresponding path program 1 times [2021-11-20 23:44:38,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:38,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865716004] [2021-11-20 23:44:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:38,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:44:38,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:38,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865716004] [2021-11-20 23:44:38,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865716004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:44:38,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175504103] [2021-11-20 23:44:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:38,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:44:38,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:44:38,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:44:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:38,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:44:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:44:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:44:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:44:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:44:39,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175504103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:44:39,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986076767] [2021-11-20 23:44:39,084 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:44:39,084 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:44:39,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:44:39,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:44:39,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:44:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,228 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-20 23:44:39,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-20 23:44:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,331 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:44:39,331 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 [2021-11-20 23:44:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-20 23:44:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:39,744 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-20 23:44:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 215 [2021-11-20 23:44:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:44:40,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:40,150 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 23:44:40,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 23:44:40,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:40,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:40,292 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-20 23:44:40,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-20 23:44:40,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:40,428 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-20 23:44:40,429 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 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-20 23:44:40,526 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 15 treesize of output 7 [2021-11-20 23:44:40,589 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 28 treesize of output 15 [2021-11-20 23:44:40,649 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 28 treesize of output 15 [2021-11-20 23:44:40,909 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:44:41,077 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:44:41,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:44:41,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-20 23:44:41,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159920755] [2021-11-20 23:44:41,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:44:41,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:44:41,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:44:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:44:41,081 INFO L87 Difference]: Start difference. First operand 12 states and 15 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) [2021-11-20 23:44:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:41,146 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2021-11-20 23:44:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:44:41,147 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 [2021-11-20 23:44:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:41,147 INFO L225 Difference]: With dead ends: 30 [2021-11-20 23:44:41,148 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 23:44:41,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:44:41,150 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:41,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:44:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 23:44:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-20 23:44:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-20 23:44:41,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2021-11-20 23:44:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:41,157 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-20 23:44:41,157 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) [2021-11-20 23:44:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-20 23:44:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:44:41,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:41,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:41,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:44:41,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:41,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash 189993743, now seen corresponding path program 2 times [2021-11-20 23:44:41,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:41,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074948389] [2021-11-20 23:44:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:41,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:44:41,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:41,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074948389] [2021-11-20 23:44:41,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074948389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:44:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171756247] [2021-11-20 23:44:41,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:44:41,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:41,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:44:41,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:44:41,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:44:41,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:44:41,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:44:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:44:41,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:44:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:44:41,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:44:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:44:41,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171756247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:44:41,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154220094] [2021-11-20 23:44:41,732 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:44:41,732 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:44:41,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:44:41,733 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:44:41,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:44:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,791 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-20 23:44:41,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-20 23:44:41,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,872 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:44:41,875 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 [2021-11-20 23:44:41,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:44:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:42,104 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-20 23:44:42,105 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 213 treesize of output 216 [2021-11-20 23:44:42,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:44:42,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:42,460 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 23:44:42,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 23:44:42,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:42,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:42,562 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-20 23:44:42,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 64 [2021-11-20 23:44:42,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:42,684 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-20 23:44:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-20 23:44:42,778 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 28 treesize of output 15 [2021-11-20 23:44:42,848 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 28 treesize of output 15 [2021-11-20 23:44:42,889 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 28 treesize of output 15 [2021-11-20 23:44:43,080 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:44:43,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:44:43,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:44:43,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-20 23:44:43,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912067537] [2021-11-20 23:44:43,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:44:43,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:44:43,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:44:43,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:44:43,230 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:43,332 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-20 23:44:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:44:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:44:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:43,333 INFO L225 Difference]: With dead ends: 54 [2021-11-20 23:44:43,334 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 23:44:43,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:44:43,335 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:44:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 23:44:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-20 23:44:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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) [2021-11-20 23:44:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-20 23:44:43,342 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2021-11-20 23:44:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:43,343 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-20 23:44:43,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-20 23:44:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 23:44:43,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:43,344 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:43,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:44:43,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:43,545 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1280965361, now seen corresponding path program 3 times [2021-11-20 23:44:43,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:43,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927839750] [2021-11-20 23:44:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:43,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 23:44:43,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:43,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927839750] [2021-11-20 23:44:43,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927839750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:44:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289916293] [2021-11-20 23:44:43,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:44:43,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:44:43,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:44:43,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:44:43,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:44:43,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:44:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:44:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:44:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 23:44:43,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:44:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 23:44:44,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289916293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:44:44,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782835720] [2021-11-20 23:44:44,168 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:44:44,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:44:44,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:44:44,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:44:44,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:44:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,243 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:44:44,244 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 [2021-11-20 23:44:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-20 23:44:44,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:44:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:44,484 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-20 23:44:44,485 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 213 treesize of output 216 [2021-11-20 23:44:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:44:44,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:44,886 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-20 23:44:44,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-20 23:44:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:44,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:44,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:44,961 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-20 23:44:44,961 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 3 case distinctions, treesize of input 55 treesize of output 60 [2021-11-20 23:44:45,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:45,039 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-20 23:44:45,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-20 23:44:45,119 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 28 treesize of output 15 [2021-11-20 23:44:45,178 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 28 treesize of output 15 [2021-11-20 23:44:45,198 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 28 treesize of output 15 [2021-11-20 23:44:45,407 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:44:45,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:44:45,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:44:45,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-20 23:44:45,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063405799] [2021-11-20 23:44:45,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:44:45,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 23:44:45,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 23:44:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:44:45,565 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:45,774 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2021-11-20 23:44:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 23:44:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 23:44:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:45,775 INFO L225 Difference]: With dead ends: 102 [2021-11-20 23:44:45,776 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 23:44:45,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:44:45,777 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:45,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:44:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 23:44:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-20 23:44:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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) [2021-11-20 23:44:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-11-20 23:44:45,788 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2021-11-20 23:44:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:45,789 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-11-20 23:44:45,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:44:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-11-20 23:44:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 23:44:45,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:45,792 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:45,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:44:46,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:46,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1212819727, now seen corresponding path program 4 times [2021-11-20 23:44:46,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348281321] [2021-11-20 23:44:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:46,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-20 23:44:46,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:46,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348281321] [2021-11-20 23:44:46,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348281321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:44:46,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660662056] [2021-11-20 23:44:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:44:46,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:46,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:44:46,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:44:46,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:44:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 23:44:46,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:44:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-20 23:44:46,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:44:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-20 23:44:47,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660662056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:44:47,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397492523] [2021-11-20 23:44:47,558 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:44:47,558 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:44:47,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:44:47,559 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:44:47,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:44:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,603 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-20 23:44:47,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-20 23:44:47,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,685 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:44:47,685 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 [2021-11-20 23:44:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:44:47,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:44:47,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:47,864 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-20 23:44:47,864 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 213 treesize of output 216 [2021-11-20 23:44:48,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:44:48,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:48,206 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 23:44:48,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 23:44:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:48,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:48,295 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-20 23:44:48,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 74 [2021-11-20 23:44:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:44:48,382 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-20 23:44:48,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-20 23:44:48,445 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 28 treesize of output 15 [2021-11-20 23:44:48,493 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 28 treesize of output 15 [2021-11-20 23:44:48,557 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 28 treesize of output 15 [2021-11-20 23:44:48,742 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:44:48,900 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:44:48,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:44:48,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-20 23:44:48,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911468336] [2021-11-20 23:44:48,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:44:48,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 23:44:48,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 23:44:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 23:44:48,905 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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) [2021-11-20 23:44:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:49,331 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2021-11-20 23:44:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 23:44:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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 73 [2021-11-20 23:44:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:49,334 INFO L225 Difference]: With dead ends: 198 [2021-11-20 23:44:49,334 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 23:44:49,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 23:44:49,337 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:49,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:44:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 23:44:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-20 23:44:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 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) [2021-11-20 23:44:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2021-11-20 23:44:49,354 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2021-11-20 23:44:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:49,354 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2021-11-20 23:44:49,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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) [2021-11-20 23:44:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2021-11-20 23:44:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 23:44:49,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:49,360 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:49,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:44:49,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:49,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:49,576 INFO L85 PathProgramCache]: Analyzing trace with hash 203125007, now seen corresponding path program 5 times [2021-11-20 23:44:49,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686768390] [2021-11-20 23:44:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:49,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-20 23:44:50,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686768390] [2021-11-20 23:44:50,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686768390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:44:50,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576994199] [2021-11-20 23:44:50,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:44:50,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:44:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:44:50,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:44:50,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff664b35-5e79-4432-8b39-3af0c72ff97a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process