./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c --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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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 253b2130a235408df8c2a581facc1d40316361da7beeb584c737673c98999cc2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:43:47,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:43:47,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:43:47,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:43:47,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:43:47,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:43:47,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:43:47,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:43:47,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:43:47,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:43:47,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:43:47,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:43:47,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:43:47,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:43:47,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:43:47,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:43:47,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:43:47,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:43:47,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:43:47,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:43:47,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:43:47,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:43:47,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:43:47,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:43:47,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:43:47,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:43:47,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:43:47,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:43:47,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:43:47,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:43:47,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:43:47,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:43:47,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:43:47,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:43:47,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:43:47,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:43:47,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:43:47,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:43:47,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:43:47,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:43:47,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:43:47,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:43:47,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:43:47,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:43:47,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:43:47,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:43:47,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:43:47,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:43:47,864 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:43:47,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:43:47,865 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:43:47,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:43:47,865 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:43:47,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:43:47,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:43:47,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:43:47,866 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:43:47,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:43:47,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:43:47,867 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:43:47,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:43:47,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:43:47,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:43:47,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:43:47,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:43:47,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:43:47,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:43:47,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:43:47,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:43:47,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:43:47,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:43:47,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:43:47,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:43:47,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:43:47,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:43:47,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:43:47,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:43:47,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:43:47,878 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:43:47,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:43:47,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:43:47,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:43:47,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:43:47,879 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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 253b2130a235408df8c2a581facc1d40316361da7beeb584c737673c98999cc2 [2021-11-21 01:43:48,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:43:48,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:43:48,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:43:48,242 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:43:48,243 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:43:48,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c [2021-11-21 01:43:48,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/8578915c4/4c9983b556ea4007b25439b598cbf587/FLAGe9cea6d77 [2021-11-21 01:43:49,058 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:43:49,059 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c [2021-11-21 01:43:49,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/8578915c4/4c9983b556ea4007b25439b598cbf587/FLAGe9cea6d77 [2021-11-21 01:43:49,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/8578915c4/4c9983b556ea4007b25439b598cbf587 [2021-11-21 01:43:49,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:43:49,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:43:49,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:43:49,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:43:49,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:43:49,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:43:49" (1/1) ... [2021-11-21 01:43:49,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729b1be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:49, skipping insertion in model container [2021-11-21 01:43:49,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:43:49" (1/1) ... [2021-11-21 01:43:49,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:43:49,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:43:49,822 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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c[65405,65418] [2021-11-21 01:43:49,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:43:49,863 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:43:50,015 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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c[65405,65418] [2021-11-21 01:43:50,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:43:50,054 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:43:50,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50 WrapperNode [2021-11-21 01:43:50,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:43:50,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:43:50,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:43:50,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:43:50,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,161 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-11-21 01:43:50,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:43:50,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:43:50,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:43:50,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:43:50,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:43:50,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:43:50,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:43:50,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:43:50,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (1/1) ... [2021-11-21 01:43:50,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:43:50,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:43:50,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:43:50,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:43:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:43:50,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:43:50,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:43:50,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:43:50,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:43:50,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:43:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:43:50,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:43:50,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:43:50,634 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:43:50,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:43:50,655 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 01:43:53,725 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-21 01:43:53,726 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-21 01:43:53,726 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:43:54,186 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:43:54,186 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:43:54,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:43:54 BoogieIcfgContainer [2021-11-21 01:43:54,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:43:54,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:43:54,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:43:54,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:43:54,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:43:49" (1/3) ... [2021-11-21 01:43:54,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d003f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:43:54, skipping insertion in model container [2021-11-21 01:43:54,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:43:50" (2/3) ... [2021-11-21 01:43:54,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d003f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:43:54, skipping insertion in model container [2021-11-21 01:43:54,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:43:54" (3/3) ... [2021-11-21 01:43:54,200 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.04.i.cil-1.c [2021-11-21 01:43:54,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:43:54,208 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:43:54,277 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:43:54,286 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 [2021-11-21 01:43:54,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:43:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 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) [2021-11-21 01:43:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:43:54,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:43:54,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:43:54,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:43:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:43:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1858607809, now seen corresponding path program 1 times [2021-11-21 01:43:54,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:43:54,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309917724] [2021-11-21 01:43:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:43:54,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:43:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:43:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:43:54,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:43:54,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309917724] [2021-11-21 01:43:54,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309917724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:43:54,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:43:54,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:43:54,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130388656] [2021-11-21 01:43:54,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:43:54,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:43:54,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:43:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:43:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:43:54,812 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 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 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-11-21 01:43:56,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:43:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:43:57,728 INFO L93 Difference]: Finished difference Result 173 states and 297 transitions. [2021-11-21 01:43:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:43:57,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 [2021-11-21 01:43:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:43:57,740 INFO L225 Difference]: With dead ends: 173 [2021-11-21 01:43:57,741 INFO L226 Difference]: Without dead ends: 85 [2021-11-21 01:43:57,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:43:57,747 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:43:57,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 332 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-21 01:43:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-21 01:43:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-21 01:43:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 84 states have internal predecessors, (122), 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) [2021-11-21 01:43:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2021-11-21 01:43:57,789 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 19 [2021-11-21 01:43:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:43:57,789 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2021-11-21 01:43:57,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-11-21 01:43:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2021-11-21 01:43:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:43:57,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:43:57,791 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:43:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:43:57,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:43:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:43:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -818675968, now seen corresponding path program 1 times [2021-11-21 01:43:57,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:43:57,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404323248] [2021-11-21 01:43:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:43:57,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:43:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:43:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:43:57,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:43:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404323248] [2021-11-21 01:43:57,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404323248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:43:57,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:43:57,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:43:57,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254059918] [2021-11-21 01:43:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:43:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:43:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:43:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:43:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:43:57,972 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:59,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:00,515 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2021-11-21 01:44:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-21 01:44:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:00,519 INFO L225 Difference]: With dead ends: 166 [2021-11-21 01:44:00,520 INFO L226 Difference]: Without dead ends: 164 [2021-11-21 01:44:00,520 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 [2021-11-21 01:44:00,522 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 87 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:00,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 205 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:44:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-21 01:44:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-21 01:44:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.462962962962963) internal successors, (237), 162 states have internal predecessors, (237), 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) [2021-11-21 01:44:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2021-11-21 01:44:00,544 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 29 [2021-11-21 01:44:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:00,544 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2021-11-21 01:44:00,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2021-11-21 01:44:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:44:00,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:00,547 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:00,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:44:00,547 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2022072445, now seen corresponding path program 1 times [2021-11-21 01:44:00,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563153098] [2021-11-21 01:44:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:00,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:00,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:00,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563153098] [2021-11-21 01:44:00,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563153098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:00,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:44:00,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979462979] [2021-11-21 01:44:00,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:00,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:00,697 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-21 01:44:02,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:03,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:03,423 INFO L93 Difference]: Finished difference Result 272 states and 395 transitions. [2021-11-21 01:44:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:03,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 41 [2021-11-21 01:44:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:03,428 INFO L225 Difference]: With dead ends: 272 [2021-11-21 01:44:03,428 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:44:03,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:03,431 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:03,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 298 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:44:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:44:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 01:44:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 178 states have internal predecessors, (263), 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) [2021-11-21 01:44:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 263 transitions. [2021-11-21 01:44:03,448 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 263 transitions. Word has length 41 [2021-11-21 01:44:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:03,449 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 263 transitions. [2021-11-21 01:44:03,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2021-11-21 01:44:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 263 transitions. [2021-11-21 01:44:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:44:03,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:03,452 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:03,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:44:03,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:03,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1581778110, now seen corresponding path program 2 times [2021-11-21 01:44:03,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:03,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981826500] [2021-11-21 01:44:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:03,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:03,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:03,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981826500] [2021-11-21 01:44:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981826500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:03,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:03,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:44:03,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126141322] [2021-11-21 01:44:03,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:03,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:03,566 INFO L87 Difference]: Start difference. First operand 179 states and 263 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-21 01:44:05,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:06,367 INFO L93 Difference]: Finished difference Result 288 states and 420 transitions. [2021-11-21 01:44:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 51 [2021-11-21 01:44:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:06,373 INFO L225 Difference]: With dead ends: 288 [2021-11-21 01:44:06,373 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:44:06,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:06,376 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 25 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:06,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 302 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 01:44:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:44:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 01:44:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4719101123595506) internal successors, (262), 178 states have internal predecessors, (262), 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) [2021-11-21 01:44:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2021-11-21 01:44:06,391 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 51 [2021-11-21 01:44:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:06,392 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2021-11-21 01:44:06,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-21 01:44:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2021-11-21 01:44:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:44:06,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:06,395 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:06,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:44:06,396 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:06,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1160328780, now seen corresponding path program 1 times [2021-11-21 01:44:06,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:06,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260507305] [2021-11-21 01:44:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:06,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:06,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:06,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260507305] [2021-11-21 01:44:06,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260507305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:06,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:44:06,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988848968] [2021-11-21 01:44:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:06,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:06,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:06,618 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-21 01:44:08,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:09,081 INFO L93 Difference]: Finished difference Result 288 states and 418 transitions. [2021-11-21 01:44:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 52 [2021-11-21 01:44:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:09,083 INFO L225 Difference]: With dead ends: 288 [2021-11-21 01:44:09,083 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:44:09,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:09,086 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:09,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 298 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:44:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:44:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 01:44:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4662921348314606) internal successors, (261), 178 states have internal predecessors, (261), 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) [2021-11-21 01:44:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 261 transitions. [2021-11-21 01:44:09,100 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 261 transitions. Word has length 52 [2021-11-21 01:44:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:09,100 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 261 transitions. [2021-11-21 01:44:09,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-21 01:44:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 261 transitions. [2021-11-21 01:44:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:44:09,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:09,104 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:09,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:44:09,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1955204427, now seen corresponding path program 1 times [2021-11-21 01:44:09,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:09,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579130587] [2021-11-21 01:44:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:09,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:09,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:09,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579130587] [2021-11-21 01:44:09,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579130587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:09,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:09,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:44:09,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035866284] [2021-11-21 01:44:09,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:09,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:09,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:09,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:09,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:09,200 INFO L87 Difference]: Start difference. First operand 179 states and 261 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-21 01:44:11,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:11,833 INFO L93 Difference]: Finished difference Result 288 states and 416 transitions. [2021-11-21 01:44:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 53 [2021-11-21 01:44:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:11,846 INFO L225 Difference]: With dead ends: 288 [2021-11-21 01:44:11,847 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:44:11,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:11,848 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 21 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:11,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 296 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 01:44:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:44:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 01:44:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 178 states have internal predecessors, (260), 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) [2021-11-21 01:44:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 260 transitions. [2021-11-21 01:44:11,869 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 260 transitions. Word has length 53 [2021-11-21 01:44:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:11,869 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 260 transitions. [2021-11-21 01:44:11,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-21 01:44:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 260 transitions. [2021-11-21 01:44:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:44:11,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:11,873 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:11,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:44:11,873 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:11,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1339648497, now seen corresponding path program 1 times [2021-11-21 01:44:11,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:11,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631122352] [2021-11-21 01:44:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:11,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:11,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631122352] [2021-11-21 01:44:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631122352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:11,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:11,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:44:11,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790684212] [2021-11-21 01:44:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:11,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:11,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:11,989 INFO L87 Difference]: Start difference. First operand 179 states and 260 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-21 01:44:13,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:14,844 INFO L93 Difference]: Finished difference Result 288 states and 414 transitions. [2021-11-21 01:44:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 01:44:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:14,847 INFO L225 Difference]: With dead ends: 288 [2021-11-21 01:44:14,847 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:44:14,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:14,849 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 19 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:14,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 294 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 01:44:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:44:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-21 01:44:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4550561797752808) internal successors, (259), 178 states have internal predecessors, (259), 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) [2021-11-21 01:44:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 259 transitions. [2021-11-21 01:44:14,859 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 259 transitions. Word has length 54 [2021-11-21 01:44:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:14,860 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 259 transitions. [2021-11-21 01:44:14,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-21 01:44:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 259 transitions. [2021-11-21 01:44:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:44:14,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:14,862 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:14,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:44:14,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:14,864 INFO L85 PathProgramCache]: Analyzing trace with hash -49613360, now seen corresponding path program 1 times [2021-11-21 01:44:14,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:14,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464879585] [2021-11-21 01:44:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:14,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:14,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464879585] [2021-11-21 01:44:14,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464879585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:14,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:14,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:44:14,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532049036] [2021-11-21 01:44:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:14,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:14,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:14,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:14,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:14,946 INFO L87 Difference]: Start difference. First operand 179 states and 259 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:16,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:17,579 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-11-21 01:44:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:17,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-21 01:44:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:17,584 INFO L225 Difference]: With dead ends: 281 [2021-11-21 01:44:17,584 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 01:44:17,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:44:17,586 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 13 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:17,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 284 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 01:44:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 01:44:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2021-11-21 01:44:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.449438202247191) internal successors, (258), 178 states have internal predecessors, (258), 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) [2021-11-21 01:44:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 258 transitions. [2021-11-21 01:44:17,610 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 258 transitions. Word has length 55 [2021-11-21 01:44:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 258 transitions. [2021-11-21 01:44:17,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 258 transitions. [2021-11-21 01:44:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:44:17,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:17,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:17,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:44:17,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash -910663934, now seen corresponding path program 1 times [2021-11-21 01:44:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407605965] [2021-11-21 01:44:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:17,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:17,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407605965] [2021-11-21 01:44:17,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407605965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:17,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177674768] [2021-11-21 01:44:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:17,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:17,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:17,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:17,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:44:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:44:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:44:18,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 01:44:18,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177674768] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:18,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:44:18,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-21 01:44:18,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494800631] [2021-11-21 01:44:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:18,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:44:18,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:44:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:44:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:44:18,450 INFO L87 Difference]: Start difference. First operand 179 states and 258 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:20,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:20,774 INFO L93 Difference]: Finished difference Result 347 states and 505 transitions. [2021-11-21 01:44:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:44:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-21 01:44:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:20,778 INFO L225 Difference]: With dead ends: 347 [2021-11-21 01:44:20,778 INFO L226 Difference]: Without dead ends: 345 [2021-11-21 01:44:20,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:44:20,779 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 82 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:20,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 203 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:44:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-21 01:44:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 341. [2021-11-21 01:44:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4676470588235293) internal successors, (499), 340 states have internal predecessors, (499), 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) [2021-11-21 01:44:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 499 transitions. [2021-11-21 01:44:20,793 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 499 transitions. Word has length 55 [2021-11-21 01:44:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:20,794 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 499 transitions. [2021-11-21 01:44:20,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 499 transitions. [2021-11-21 01:44:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:44:20,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:20,796 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:20,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:21,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:21,005 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash -810190222, now seen corresponding path program 1 times [2021-11-21 01:44:21,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:44:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822182688] [2021-11-21 01:44:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:21,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:44:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:44:21,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:44:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822182688] [2021-11-21 01:44:21,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822182688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:44:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66116497] [2021-11-21 01:44:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:21,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:21,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:21,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:44:21,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:44:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:44:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:44:21,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 01:44:22,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66116497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:22,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44915461] [2021-11-21 01:44:22,260 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 01:44:22,260 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:44:22,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:44:22,271 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:44:22,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:44:25,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:25,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:44:25,321 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:44:25,325 INFO L158 Benchmark]: Toolchain (without parser) took 36130.57ms. Allocated memory was 83.9MB in the beginning and 155.2MB in the end (delta: 71.3MB). Free memory was 47.8MB in the beginning and 72.4MB in the end (delta: -24.5MB). Peak memory consumption was 91.2MB. Max. memory is 16.1GB. [2021-11-21 01:44:25,326 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:44:25,326 INFO L158 Benchmark]: CACSL2BoogieTranslator took 857.59ms. Allocated memory was 83.9MB in the beginning and 102.8MB in the end (delta: 18.9MB). Free memory was 47.6MB in the beginning and 60.5MB in the end (delta: -12.9MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-21 01:44:25,326 INFO L158 Benchmark]: Boogie Procedure Inliner took 105.05ms. Allocated memory is still 102.8MB. Free memory was 60.5MB in the beginning and 56.0MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:44:25,327 INFO L158 Benchmark]: Boogie Preprocessor took 114.13ms. Allocated memory is still 102.8MB. Free memory was 56.0MB in the beginning and 49.3MB in the end (delta: 6.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 01:44:25,327 INFO L158 Benchmark]: RCFGBuilder took 3911.78ms. Allocated memory was 102.8MB in the beginning and 155.2MB in the end (delta: 52.4MB). Free memory was 49.3MB in the beginning and 104.0MB in the end (delta: -54.7MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2021-11-21 01:44:25,327 INFO L158 Benchmark]: TraceAbstraction took 31131.60ms. Allocated memory is still 155.2MB. Free memory was 104.0MB in the beginning and 72.4MB in the end (delta: 31.7MB). Peak memory consumption was 76.7MB. Max. memory is 16.1GB. [2021-11-21 01:44:25,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 62.5MB in the beginning and 62.5MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 857.59ms. Allocated memory was 83.9MB in the beginning and 102.8MB in the end (delta: 18.9MB). Free memory was 47.6MB in the beginning and 60.5MB in the end (delta: -12.9MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 105.05ms. Allocated memory is still 102.8MB. Free memory was 60.5MB in the beginning and 56.0MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 114.13ms. Allocated memory is still 102.8MB. Free memory was 56.0MB in the beginning and 49.3MB in the end (delta: 6.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3911.78ms. Allocated memory was 102.8MB in the beginning and 155.2MB in the end (delta: 52.4MB). Free memory was 49.3MB in the beginning and 104.0MB in the end (delta: -54.7MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. * TraceAbstraction took 31131.60ms. Allocated memory is still 155.2MB. Free memory was 104.0MB in the beginning and 72.4MB in the end (delta: 31.7MB). Peak memory consumption was 76.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 01:44:25,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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 253b2130a235408df8c2a581facc1d40316361da7beeb584c737673c98999cc2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:44:27,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:44:27,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:44:27,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:44:27,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:44:27,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:44:27,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:44:27,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:44:27,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:44:27,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:44:27,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:44:27,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:44:27,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:44:27,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:44:27,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:44:27,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:44:27,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:44:27,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:44:27,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:44:27,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:44:27,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:44:27,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:44:27,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:44:27,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:44:27,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:44:27,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:44:27,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:44:27,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:44:27,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:44:27,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:44:27,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:44:27,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:44:28,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:44:28,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:44:28,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:44:28,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:44:28,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:44:28,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:44:28,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:44:28,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:44:28,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:44:28,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:44:28,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:44:28,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:44:28,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:44:28,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:44:28,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:44:28,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:44:28,060 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:44:28,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:44:28,060 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:44:28,060 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:44:28,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:44:28,062 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:44:28,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:44:28,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:44:28,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:44:28,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:44:28,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:44:28,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:44:28,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:44:28,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:44:28,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:44:28,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:44:28,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:44:28,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:44:28,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:44:28,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:44:28,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:44:28,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:44:28,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:28,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:44:28,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:44:28,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:44:28,069 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:44:28,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:44:28,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:44:28,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:44:28,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:44:28,070 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 253b2130a235408df8c2a581facc1d40316361da7beeb584c737673c98999cc2 [2021-11-21 01:44:28,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:44:28,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:44:28,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:44:28,505 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:44:28,506 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:44:28,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c [2021-11-21 01:44:28,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/1d986eb6f/37288b378c6e49a290248e855ccdeea0/FLAG1dee8e743 [2021-11-21 01:44:29,397 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:44:29,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c [2021-11-21 01:44:29,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/1d986eb6f/37288b378c6e49a290248e855ccdeea0/FLAG1dee8e743 [2021-11-21 01:44:29,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/data/1d986eb6f/37288b378c6e49a290248e855ccdeea0 [2021-11-21 01:44:29,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:44:29,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:44:29,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:29,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:44:29,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:44:29,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:29" (1/1) ... [2021-11-21 01:44:29,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5235987d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:29, skipping insertion in model container [2021-11-21 01:44:29,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:44:29" (1/1) ... [2021-11-21 01:44:29,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:44:29,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:44:30,068 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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c[65405,65418] [2021-11-21 01:44:30,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:30,131 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:44:30,338 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_8ce4ae34-ec9f-437e-a187-65ee33c18b24/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-1.c[65405,65418] [2021-11-21 01:44:30,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:44:30,374 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:44:30,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30 WrapperNode [2021-11-21 01:44:30,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:44:30,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:30,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:44:30,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:44:30,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,543 INFO L137 Inliner]: procedures = 35, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 689 [2021-11-21 01:44:30,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:44:30,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:44:30,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:44:30,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:44:30,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:44:30,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:44:30,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:44:30,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:44:30,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (1/1) ... [2021-11-21 01:44:30,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:44:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:44:30,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:44:30,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:44:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:44:30,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:44:30,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:44:30,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:44:30,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:44:30,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:44:30,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:44:30,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:44:30,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:44:30,992 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:44:30,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:44:31,011 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 01:44:35,792 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-21 01:44:35,792 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-21 01:44:35,792 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:44:35,807 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:44:35,810 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:44:35,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:35 BoogieIcfgContainer [2021-11-21 01:44:35,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:44:35,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:44:35,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:44:35,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:44:35,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:44:29" (1/3) ... [2021-11-21 01:44:35,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c6a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:35, skipping insertion in model container [2021-11-21 01:44:35,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:44:30" (2/3) ... [2021-11-21 01:44:35,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c6a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:44:35, skipping insertion in model container [2021-11-21 01:44:35,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:44:35" (3/3) ... [2021-11-21 01:44:35,824 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.04.i.cil-1.c [2021-11-21 01:44:35,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:44:35,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:44:35,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:44:35,932 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 [2021-11-21 01:44:35,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:44:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 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) [2021-11-21 01:44:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:44:35,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:35,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:35,971 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-11-21 01:44:35,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:35,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309092238] [2021-11-21 01:44:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:35,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:35,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:36,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:36,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:44:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:44:36,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:36,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:36,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:44:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309092238] [2021-11-21 01:44:36,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309092238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:36,880 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:36,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:44:36,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925736016] [2021-11-21 01:44:36,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:36,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:36,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:44:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:36,948 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2021-11-21 01:44:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:37,297 INFO L93 Difference]: Finished difference Result 487 states and 823 transitions. [2021-11-21 01:44:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 24 [2021-11-21 01:44:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:37,333 INFO L225 Difference]: With dead ends: 487 [2021-11-21 01:44:37,334 INFO L226 Difference]: Without dead ends: 314 [2021-11-21 01:44:37,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:37,342 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 359 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:37,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 588 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:44:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-21 01:44:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-11-21 01:44:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.5015974440894568) internal successors, (470), 313 states have internal predecessors, (470), 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) [2021-11-21 01:44:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 470 transitions. [2021-11-21 01:44:37,415 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 470 transitions. Word has length 24 [2021-11-21 01:44:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:37,416 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 470 transitions. [2021-11-21 01:44:37,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2021-11-21 01:44:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 470 transitions. [2021-11-21 01:44:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:44:37,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:37,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:37,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:37,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:44:37,625 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1854239308, now seen corresponding path program 1 times [2021-11-21 01:44:37,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379738065] [2021-11-21 01:44:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:37,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:37,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:37,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:44:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:44:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:38,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:44:38,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:44:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379738065] [2021-11-21 01:44:38,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379738065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:44:38,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:44:38,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:44:38,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178147846] [2021-11-21 01:44:38,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:44:38,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:44:38,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:44:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:44:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:38,762 INFO L87 Difference]: Start difference. First operand 314 states and 470 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-21 01:44:40,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:44:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:41,069 INFO L93 Difference]: Finished difference Result 721 states and 1085 transitions. [2021-11-21 01:44:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:44:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 60 [2021-11-21 01:44:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:41,075 INFO L225 Difference]: With dead ends: 721 [2021-11-21 01:44:41,075 INFO L226 Difference]: Without dead ends: 515 [2021-11-21 01:44:41,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:44:41,101 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 270 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:41,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 595 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:44:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-21 01:44:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2021-11-21 01:44:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.4941634241245136) internal successors, (768), 514 states have internal predecessors, (768), 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) [2021-11-21 01:44:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 768 transitions. [2021-11-21 01:44:41,167 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 768 transitions. Word has length 60 [2021-11-21 01:44:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:41,168 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 768 transitions. [2021-11-21 01:44:41,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-21 01:44:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 768 transitions. [2021-11-21 01:44:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-21 01:44:41,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:41,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:41,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:41,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:44:41,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:44:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 465583256, now seen corresponding path program 1 times [2021-11-21 01:44:41,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:41,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568217377] [2021-11-21 01:44:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:44:41,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:41,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:41,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce4ae34-ec9f-437e-a187-65ee33c18b24/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:44:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:44:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:44:41,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:43,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:44:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 2058 treesize of output 1842 [2021-11-21 01:44:46,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:44:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2067 treesize of output 1935 [2021-11-21 01:48:38,511 WARN L227 SmtUtils]: Spent 3.86m on a formula simplification. DAG size of input: 319 DAG size of output: 227 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:48:38,517 INFO L354 Elim1Store]: treesize reduction 1988, result has 47.7 percent of original size [2021-11-21 01:48:38,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 1863 treesize of output 2305 [2021-11-21 01:48:38,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2368 treesize of output 2158 [2021-11-21 01:48:39,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2158 treesize of output 1948