./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.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_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/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_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/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_c040a05a-87e8-497b-ae8c-91d66193e052/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 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:15:05,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:15:05,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:15:05,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:15:05,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:15:05,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:15:05,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:15:05,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:15:05,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:15:05,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:15:05,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:15:05,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:15:05,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:15:05,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:15:05,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:15:05,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:15:05,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:15:05,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:15:05,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:15:05,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:15:05,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:15:05,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:15:05,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:15:05,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:15:05,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:15:05,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:15:05,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:15:05,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:15:05,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:15:05,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:15:05,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:15:05,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:15:05,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:15:05,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:15:05,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:15:05,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:15:05,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:15:05,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:15:05,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:15:05,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:15:05,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:15:05,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:15:05,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:15:05,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:15:05,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:15:05,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:15:05,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:15:05,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:15:05,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:15:05,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:15:05,851 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:15:05,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:15:05,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:15:05,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:15:05,852 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:15:05,852 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:15:05,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:15:05,853 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:15:05,853 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:15:05,853 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:15:05,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:15:05,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:15:05,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:15:05,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:15:05,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:15:05,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:15:05,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:15:05,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:15:05,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:15:05,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:15:05,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:15:05,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:15:05,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:15:05,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:15:05,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:05,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:15:05,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:15:05,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:15:05,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:15:05,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:15:05,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:15:05,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:15:05,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:15:05,859 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_c040a05a-87e8-497b-ae8c-91d66193e052/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 [2021-11-20 23:15:06,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:15:06,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:15:06,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:15:06,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:15:06,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:15:06,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2021-11-20 23:15:06,190 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/data/beda3e8d4/0e664001c1e8427683b33df80251233b/FLAGdfc67d018 [2021-11-20 23:15:06,626 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:15:06,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2021-11-20 23:15:06,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/data/beda3e8d4/0e664001c1e8427683b33df80251233b/FLAGdfc67d018 [2021-11-20 23:15:07,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/data/beda3e8d4/0e664001c1e8427683b33df80251233b [2021-11-20 23:15:07,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:15:07,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:15:07,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:07,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:15:07,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:15:07,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eff1469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07, skipping insertion in model container [2021-11-20 23:15:07,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:15:07,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:15:07,212 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_c040a05a-87e8-497b-ae8c-91d66193e052/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2021-11-20 23:15:07,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:07,232 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:15:07,242 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_c040a05a-87e8-497b-ae8c-91d66193e052/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2021-11-20 23:15:07,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:07,256 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:15:07,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07 WrapperNode [2021-11-20 23:15:07,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:07,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:07,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:15:07,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:15:07,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,285 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-20 23:15:07,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:07,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:15:07,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:15:07,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:15:07,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:15:07,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:15:07,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:15:07,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:15:07,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (1/1) ... [2021-11-20 23:15:07,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:07,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:15:07,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:15:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:15:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:15:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:15:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:15:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:15:07,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:15:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:15:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:15:07,480 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:15:07,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:15:07,628 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:15:07,678 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:15:07,678 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:15:07,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:07 BoogieIcfgContainer [2021-11-20 23:15:07,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:15:07,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:15:07,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:15:07,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:15:07,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:15:07" (1/3) ... [2021-11-20 23:15:07,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae7e057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:07, skipping insertion in model container [2021-11-20 23:15:07,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:07" (2/3) ... [2021-11-20 23:15:07,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae7e057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:07, skipping insertion in model container [2021-11-20 23:15:07,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:07" (3/3) ... [2021-11-20 23:15:07,700 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2021-11-20 23:15:07,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:15:07,705 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:15:07,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:15:07,755 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:15:07,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:15:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:15:07,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:07,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:15:07,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 72684179, now seen corresponding path program 1 times [2021-11-20 23:15:07,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:07,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211284650] [2021-11-20 23:15:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:07,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:07,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:07,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211284650] [2021-11-20 23:15:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211284650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:07,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:07,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:15:07,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437626448] [2021-11-20 23:15:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:07,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:07,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:07,993 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:08,026 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-20 23:15:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:15:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:08,035 INFO L225 Difference]: With dead ends: 15 [2021-11-20 23:15:08,035 INFO L226 Difference]: Without dead ends: 8 [2021-11-20 23:15:08,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:08,042 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:08,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:15:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-20 23:15:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-20 23:15:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-20 23:15:08,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-20 23:15:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:08,070 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-20 23:15:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-20 23:15:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:15:08,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:08,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:15:08,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:15:08,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2045544120, now seen corresponding path program 1 times [2021-11-20 23:15:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:08,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103763897] [2021-11-20 23:15:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:08,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:08,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103763897] [2021-11-20 23:15:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103763897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133169343] [2021-11-20 23:15:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:08,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:08,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:08,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:15:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:15:08,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:08,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:08,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133169343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533070074] [2021-11-20 23:15:08,465 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 23:15:08,465 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:08,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:08,487 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:08,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:08,653 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:08,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:08,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:08,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-20 23:15:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:08,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-20 23:15:09,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:09,205 INFO L354 Elim1Store]: treesize reduction 114, result has 30.9 percent of original size [2021-11-20 23:15:09,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 270 [2021-11-20 23:15:10,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:10,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:10,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-20 23:15:10,243 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:10,366 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:10,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:15:10,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-20 23:15:10,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333093704] [2021-11-20 23:15:10,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:10,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:15:10,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:15:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:15:10,370 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:10,393 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-20 23:15:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:15:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:10,395 INFO L225 Difference]: With dead ends: 16 [2021-11-20 23:15:10,395 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 23:15:10,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:15:10,398 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:10,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:15:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 23:15:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-20 23:15:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-20 23:15:10,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-20 23:15:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-20 23:15:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-20 23:15:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:15:10,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:10,405 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-20 23:15:10,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 23:15:10,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:10,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:10,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1273784365, now seen corresponding path program 2 times [2021-11-20 23:15:10,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:10,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033290943] [2021-11-20 23:15:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:10,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:10,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:10,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033290943] [2021-11-20 23:15:10,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033290943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:10,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247490526] [2021-11-20 23:15:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:15:10,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:10,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:10,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:10,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:15:10,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:15:10,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:15:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:15:10,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:10,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:10,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247490526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627524343] [2021-11-20 23:15:10,999 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 23:15:10,999 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:10,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:10,999 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:10,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,051 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 23:15:11,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-20 23:15:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,122 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-20 23:15:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:11,422 INFO L354 Elim1Store]: treesize reduction 114, result has 30.9 percent of original size [2021-11-20 23:15:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 270 [2021-11-20 23:15:12,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:12,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:12,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-20 23:15:12,253 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:12,366 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:12,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:15:12,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-11-20 23:15:12,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981311220] [2021-11-20 23:15:12,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:12,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 23:15:12,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:12,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 23:15:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=231, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:15:12,369 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:12,420 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-20 23:15:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:15:12,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:15:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:12,423 INFO L225 Difference]: With dead ends: 22 [2021-11-20 23:15:12,423 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 23:15:12,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=231, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:15:12,430 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:12,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:15:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 23:15:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 23:15:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-20 23:15:12,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-20 23:15:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:12,442 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-20 23:15:12,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-20 23:15:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:15:12,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:12,443 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-20 23:15:12,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:12,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 23:15:12,671 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 904508339, now seen corresponding path program 3 times [2021-11-20 23:15:12,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024579864] [2021-11-20 23:15:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:12,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:12,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:12,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024579864] [2021-11-20 23:15:12,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024579864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:12,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010352595] [2021-11-20 23:15:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:15:12,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:12,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:12,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:15:12,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:15:12,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:15:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:15:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:13,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010352595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262567253] [2021-11-20 23:15:13,406 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 23:15:13,406 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:13,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:13,407 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:13,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,444 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 23:15:13,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-20 23:15:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,518 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2021-11-20 23:15:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:13,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,784 INFO L354 Elim1Store]: treesize reduction 114, result has 30.9 percent of original size [2021-11-20 23:15:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 270 [2021-11-20 23:15:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-20 23:15:14,576 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:14,698 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:14,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:15:14,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-11-20 23:15:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827256825] [2021-11-20 23:15:14,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:14,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 23:15:14,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 23:15:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=819, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 23:15:14,701 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:14,769 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-20 23:15:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 23:15:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 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 15 [2021-11-20 23:15:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:14,774 INFO L225 Difference]: With dead ends: 34 [2021-11-20 23:15:14,774 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 23:15:14,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=819, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 23:15:14,776 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:14,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 23:15:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 23:15:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-20 23:15:14,787 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-20 23:15:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-20 23:15:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-20 23:15:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:15:14,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:14,793 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-20 23:15:14,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:15,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:15,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash 102675315, now seen corresponding path program 4 times [2021-11-20 23:15:15,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200734860] [2021-11-20 23:15:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:15,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:15,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:15,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200734860] [2021-11-20 23:15:15,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200734860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:15,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809795793] [2021-11-20 23:15:15,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:15:15,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:15,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:15,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:15:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:15,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:15:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:16,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:16,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809795793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:16,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186682294] [2021-11-20 23:15:16,879 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 23:15:16,879 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:16,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:16,880 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:16,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:16,925 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:16,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:16,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-20 23:15:17,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 57 [2021-11-20 23:15:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,166 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-20 23:15:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 252 treesize of output 263 [2021-11-20 23:15:17,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-20 23:15:17,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:17,687 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:17,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:15:17,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2021-11-20 23:15:17,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595731006] [2021-11-20 23:15:17,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:17,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 23:15:17,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 23:15:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2475, Invalid=3075, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 23:15:17,693 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:17,848 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2021-11-20 23:15:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 23:15:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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 27 [2021-11-20 23:15:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:17,851 INFO L225 Difference]: With dead ends: 58 [2021-11-20 23:15:17,851 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 23:15:17,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2475, Invalid=3075, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 23:15:17,856 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:17,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 23:15:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 23:15:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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) [2021-11-20 23:15:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-20 23:15:17,879 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-20 23:15:17,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:17,880 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-20 23:15:17,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:17,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-20 23:15:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:15:17,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:17,882 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-20 23:15:17,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:18,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:18,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1127469811, now seen corresponding path program 5 times [2021-11-20 23:15:18,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:18,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421208229] [2021-11-20 23:15:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:18,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:19,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421208229] [2021-11-20 23:15:19,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421208229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:15:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359866401] [2021-11-20 23:15:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:15:19,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:19,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:19,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c040a05a-87e8-497b-ae8c-91d66193e052/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process