./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/heapsort.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/heapsort.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:59:00,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:59:00,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:59:00,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:59:00,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:59:00,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:59:00,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:59:00,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:59:00,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:59:00,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:59:00,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:59:00,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:59:00,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:59:00,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:59:00,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:59:00,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:59:00,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:59:00,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:59:00,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:59:00,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:59:00,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:59:00,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:59:00,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:59:00,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:59:01,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:59:01,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:59:01,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:59:01,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:59:01,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:59:01,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:59:01,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:59:01,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:59:01,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:59:01,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:59:01,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:59:01,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:59:01,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:59:01,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:59:01,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:59:01,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:59:01,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:59:01,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:59:01,067 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:59:01,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:59:01,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:59:01,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:59:01,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:59:01,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:59:01,069 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:59:01,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:59:01,069 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:59:01,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:59:01,070 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:59:01,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:59:01,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:59:01,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:59:01,070 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:59:01,071 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:59:01,071 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:59:01,071 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:59:01,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:59:01,076 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:59:01,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:59:01,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:59:01,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:59:01,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:59:01,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:59:01,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:59:01,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:59:01,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:59:01,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:59:01,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:59:01,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:59:01,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:59:01,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:59:01,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:59:01,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:59:01,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:59:01,082 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:59:01,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:59:01,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:59:01,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:59:01,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:59:01,083 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_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2021-11-25 18:59:01,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:59:01,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:59:01,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:59:01,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:59:01,479 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:59:01,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-invgen/heapsort.i [2021-11-25 18:59:01,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/data/3eb130807/c2ad1d6352244a6aa7755266550ba422/FLAGb5cc4d26f [2021-11-25 18:59:02,080 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:59:02,080 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/sv-benchmarks/c/loop-invgen/heapsort.i [2021-11-25 18:59:02,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/data/3eb130807/c2ad1d6352244a6aa7755266550ba422/FLAGb5cc4d26f [2021-11-25 18:59:02,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/data/3eb130807/c2ad1d6352244a6aa7755266550ba422 [2021-11-25 18:59:02,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:59:02,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:59:02,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:59:02,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:59:02,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:59:02,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c1ece5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02, skipping insertion in model container [2021-11-25 18:59:02,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:59:02,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:59:02,670 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_72b09b63-f6ff-43ba-b1cb-adbb600f9468/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2021-11-25 18:59:02,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:59:02,714 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:59:02,729 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_72b09b63-f6ff-43ba-b1cb-adbb600f9468/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2021-11-25 18:59:02,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:59:02,768 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:59:02,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02 WrapperNode [2021-11-25 18:59:02,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:59:02,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:59:02,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:59:02,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:59:02,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,821 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-11-25 18:59:02,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:59:02,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:59:02,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:59:02,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:59:02,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:59:02,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:59:02,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:59:02,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:59:02,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (1/1) ... [2021-11-25 18:59:02,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:59:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:02,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:59:02,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:59:02,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:59:02,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:59:02,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:59:02,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:59:02,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:59:02,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:59:03,014 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:59:03,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:59:03,222 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:59:03,277 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:59:03,278 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:59:03,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:59:03 BoogieIcfgContainer [2021-11-25 18:59:03,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:59:03,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:59:03,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:59:03,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:59:03,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:59:02" (1/3) ... [2021-11-25 18:59:03,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e34e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:59:03, skipping insertion in model container [2021-11-25 18:59:03,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:02" (2/3) ... [2021-11-25 18:59:03,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e34e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:59:03, skipping insertion in model container [2021-11-25 18:59:03,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:59:03" (3/3) ... [2021-11-25 18:59:03,288 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2021-11-25 18:59:03,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:59:03,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:59:03,377 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:59:03,388 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:59:03,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:59:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 18:59:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:59:03,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:03,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:03,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1905704588, now seen corresponding path program 1 times [2021-11-25 18:59:03,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929424558] [2021-11-25 18:59:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:03,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:03,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:03,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929424558] [2021-11-25 18:59:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929424558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:03,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:03,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:59:03,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955707248] [2021-11-25 18:59:03,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:03,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:59:03,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:59:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:59:03,719 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:03,836 INFO L93 Difference]: Finished difference Result 93 states and 172 transitions. [2021-11-25 18:59:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:59:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:59:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:03,848 INFO L225 Difference]: With dead ends: 93 [2021-11-25 18:59:03,848 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 18:59:03,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:03,856 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 20 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:03,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 176 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 18:59:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2021-11-25 18:59:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 18:59:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2021-11-25 18:59:03,907 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 9 [2021-11-25 18:59:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:03,908 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2021-11-25 18:59:03,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2021-11-25 18:59:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:59:03,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:03,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:03,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:59:03,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1900967819, now seen corresponding path program 1 times [2021-11-25 18:59:03,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:03,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283123108] [2021-11-25 18:59:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:03,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:03,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283123108] [2021-11-25 18:59:03,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283123108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:03,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:03,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:59:03,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115437717] [2021-11-25 18:59:03,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:03,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:59:03,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:59:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:59:03,991 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:04,053 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2021-11-25 18:59:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:59:04,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:59:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:04,055 INFO L225 Difference]: With dead ends: 43 [2021-11-25 18:59:04,055 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 18:59:04,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:04,057 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:04,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 122 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:59:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 18:59:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-25 18:59:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 18:59:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2021-11-25 18:59:04,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 9 [2021-11-25 18:59:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:04,070 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2021-11-25 18:59:04,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2021-11-25 18:59:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:59:04,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:04,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:04,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:59:04,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash -504724405, now seen corresponding path program 1 times [2021-11-25 18:59:04,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:04,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757267067] [2021-11-25 18:59:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:04,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:04,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757267067] [2021-11-25 18:59:04,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757267067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:04,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:04,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:59:04,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082036814] [2021-11-25 18:59:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:04,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:59:04,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:59:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:04,158 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:04,414 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2021-11-25 18:59:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:59:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:59:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:04,419 INFO L225 Difference]: With dead ends: 72 [2021-11-25 18:59:04,420 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 18:59:04,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:59:04,427 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:04,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 199 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:59:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 18:59:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-11-25 18:59:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:59:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 95 transitions. [2021-11-25 18:59:04,460 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 95 transitions. Word has length 9 [2021-11-25 18:59:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:04,461 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 95 transitions. [2021-11-25 18:59:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 95 transitions. [2021-11-25 18:59:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:59:04,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:04,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:04,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:59:04,465 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash -742689088, now seen corresponding path program 1 times [2021-11-25 18:59:04,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:04,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027038656] [2021-11-25 18:59:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:04,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:04,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:04,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027038656] [2021-11-25 18:59:04,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027038656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:04,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:04,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:59:04,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396309773] [2021-11-25 18:59:04,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:04,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:59:04,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:59:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:04,634 INFO L87 Difference]: Start difference. First operand 65 states and 95 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:04,836 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2021-11-25 18:59:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:59:04,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:59:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:04,840 INFO L225 Difference]: With dead ends: 71 [2021-11-25 18:59:04,840 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 18:59:04,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:59:04,852 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:04,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 150 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 18:59:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 18:59:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:59:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2021-11-25 18:59:04,882 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 14 [2021-11-25 18:59:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:04,882 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2021-11-25 18:59:04,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2021-11-25 18:59:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:59:04,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:04,885 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:04,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:59:04,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -361326625, now seen corresponding path program 1 times [2021-11-25 18:59:04,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:04,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429963278] [2021-11-25 18:59:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:04,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:04,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:04,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429963278] [2021-11-25 18:59:04,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429963278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:04,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:04,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:59:04,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98427454] [2021-11-25 18:59:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:04,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:59:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:59:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:59:04,997 INFO L87 Difference]: Start difference. First operand 69 states and 98 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:05,096 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2021-11-25 18:59:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:59:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:59:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:05,098 INFO L225 Difference]: With dead ends: 75 [2021-11-25 18:59:05,098 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 18:59:05,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:05,100 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:05,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 18:59:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-25 18:59:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:59:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2021-11-25 18:59:05,116 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 14 [2021-11-25 18:59:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:05,117 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2021-11-25 18:59:05,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2021-11-25 18:59:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:59:05,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:05,118 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:05,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:59:05,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:05,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1770883895, now seen corresponding path program 1 times [2021-11-25 18:59:05,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801411590] [2021-11-25 18:59:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:05,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:05,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801411590] [2021-11-25 18:59:05,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801411590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:05,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:05,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:59:05,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93136720] [2021-11-25 18:59:05,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:05,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:59:05,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:59:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:05,175 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:05,288 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2021-11-25 18:59:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:59:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:59:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:05,290 INFO L225 Difference]: With dead ends: 79 [2021-11-25 18:59:05,290 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 18:59:05,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:59:05,292 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:05,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 139 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 18:59:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-25 18:59:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 18:59:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2021-11-25 18:59:05,306 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 14 [2021-11-25 18:59:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:05,307 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2021-11-25 18:59:05,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2021-11-25 18:59:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:59:05,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:05,311 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:05,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:59:05,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1597699484, now seen corresponding path program 1 times [2021-11-25 18:59:05,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939163383] [2021-11-25 18:59:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:05,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:05,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:05,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939163383] [2021-11-25 18:59:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939163383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:05,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:05,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:59:05,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874343736] [2021-11-25 18:59:05,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:05,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:59:05,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:59:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:05,387 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:05,525 INFO L93 Difference]: Finished difference Result 118 states and 165 transitions. [2021-11-25 18:59:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:59:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:59:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:05,530 INFO L225 Difference]: With dead ends: 118 [2021-11-25 18:59:05,530 INFO L226 Difference]: Without dead ends: 116 [2021-11-25 18:59:05,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:59:05,532 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 26 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:05,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 209 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-25 18:59:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2021-11-25 18:59:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 38 states have call successors, (38), 9 states have call predecessors, (38), 9 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-25 18:59:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2021-11-25 18:59:05,567 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 14 [2021-11-25 18:59:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:05,567 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2021-11-25 18:59:05,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2021-11-25 18:59:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:59:05,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:05,568 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:05,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:59:05,568 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1057383317, now seen corresponding path program 1 times [2021-11-25 18:59:05,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:05,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591312007] [2021-11-25 18:59:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:05,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:59:05,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:05,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591312007] [2021-11-25 18:59:05,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591312007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:05,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:05,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:59:05,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288769765] [2021-11-25 18:59:05,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:05,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:59:05,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:59:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:05,641 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:59:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:05,789 INFO L93 Difference]: Finished difference Result 153 states and 225 transitions. [2021-11-25 18:59:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:59:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-25 18:59:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:05,796 INFO L225 Difference]: With dead ends: 153 [2021-11-25 18:59:05,796 INFO L226 Difference]: Without dead ends: 151 [2021-11-25 18:59:05,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:59:05,798 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:05,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 223 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-25 18:59:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2021-11-25 18:59:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 44 states have call successors, (44), 10 states have call predecessors, (44), 10 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-25 18:59:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2021-11-25 18:59:05,839 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 21 [2021-11-25 18:59:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:05,840 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2021-11-25 18:59:05,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:59:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2021-11-25 18:59:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:59:05,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:05,846 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:05,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:59:05,848 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1020128255, now seen corresponding path program 1 times [2021-11-25 18:59:05,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:05,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610359176] [2021-11-25 18:59:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:05,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:59:05,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:05,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610359176] [2021-11-25 18:59:05,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610359176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:05,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:05,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:59:05,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762788628] [2021-11-25 18:59:05,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:05,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:59:05,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:59:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:05,955 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:59:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:06,090 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2021-11-25 18:59:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:59:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-25 18:59:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:06,097 INFO L225 Difference]: With dead ends: 126 [2021-11-25 18:59:06,097 INFO L226 Difference]: Without dead ends: 124 [2021-11-25 18:59:06,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:59:06,102 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:06,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 130 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-25 18:59:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2021-11-25 18:59:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 18:59:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2021-11-25 18:59:06,122 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 23 [2021-11-25 18:59:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:06,122 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2021-11-25 18:59:06,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:59:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2021-11-25 18:59:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:59:06,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:06,124 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:06,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:59:06,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 970924607, now seen corresponding path program 1 times [2021-11-25 18:59:06,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:06,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618329230] [2021-11-25 18:59:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:06,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:59:06,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618329230] [2021-11-25 18:59:06,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618329230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:06,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:06,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:59:06,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806404080] [2021-11-25 18:59:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:06,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:59:06,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:59:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:06,199 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:59:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:06,368 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-11-25 18:59:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:59:06,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-25 18:59:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:06,371 INFO L225 Difference]: With dead ends: 98 [2021-11-25 18:59:06,372 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 18:59:06,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:59:06,374 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 200 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 18:59:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2021-11-25 18:59:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 18:59:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-11-25 18:59:06,391 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 26 [2021-11-25 18:59:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:06,392 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-11-25 18:59:06,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:59:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2021-11-25 18:59:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:59:06,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:06,395 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:06,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:59:06,395 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash 606224610, now seen corresponding path program 1 times [2021-11-25 18:59:06,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:06,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507366186] [2021-11-25 18:59:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:06,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:59:06,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:06,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507366186] [2021-11-25 18:59:06,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507366186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:06,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:06,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:59:06,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24891654] [2021-11-25 18:59:06,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:06,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:59:06,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:59:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:59:06,523 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:59:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:06,688 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2021-11-25 18:59:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:59:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-11-25 18:59:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:06,692 INFO L225 Difference]: With dead ends: 101 [2021-11-25 18:59:06,692 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 18:59:06,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:59:06,694 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:06,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 194 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 18:59:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-11-25 18:59:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 57 states have internal predecessors, (64), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 18:59:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2021-11-25 18:59:06,713 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 35 [2021-11-25 18:59:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:06,714 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2021-11-25 18:59:06,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:59:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2021-11-25 18:59:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:59:06,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:06,717 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:06,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:59:06,718 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1230275415, now seen corresponding path program 1 times [2021-11-25 18:59:06,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:06,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676862808] [2021-11-25 18:59:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:06,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:59:06,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676862808] [2021-11-25 18:59:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676862808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:06,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:06,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:59:06,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880732768] [2021-11-25 18:59:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:06,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:59:06,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:59:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:06,817 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:59:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:06,952 INFO L93 Difference]: Finished difference Result 163 states and 228 transitions. [2021-11-25 18:59:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:59:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-11-25 18:59:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:06,955 INFO L225 Difference]: With dead ends: 163 [2021-11-25 18:59:06,955 INFO L226 Difference]: Without dead ends: 161 [2021-11-25 18:59:06,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:59:06,957 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 31 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:06,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 265 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-25 18:59:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2021-11-25 18:59:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 84 states have internal predecessors, (97), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 18:59:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 199 transitions. [2021-11-25 18:59:06,984 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 199 transitions. Word has length 42 [2021-11-25 18:59:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:06,987 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 199 transitions. [2021-11-25 18:59:06,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 18:59:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 199 transitions. [2021-11-25 18:59:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 18:59:06,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:06,989 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:06,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:59:06,990 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:06,991 INFO L85 PathProgramCache]: Analyzing trace with hash -653270493, now seen corresponding path program 1 times [2021-11-25 18:59:06,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:06,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169497382] [2021-11-25 18:59:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:06,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:59:07,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:07,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169497382] [2021-11-25 18:59:07,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169497382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:07,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:07,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:59:07,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421911736] [2021-11-25 18:59:07,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:07,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:59:07,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:59:07,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:07,051 INFO L87 Difference]: Start difference. First operand 145 states and 199 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:59:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:07,195 INFO L93 Difference]: Finished difference Result 188 states and 269 transitions. [2021-11-25 18:59:07,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:59:07,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-11-25 18:59:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:07,198 INFO L225 Difference]: With dead ends: 188 [2021-11-25 18:59:07,198 INFO L226 Difference]: Without dead ends: 186 [2021-11-25 18:59:07,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:59:07,199 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:07,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 214 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-25 18:59:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-11-25 18:59:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 52 states have internal predecessors, (59), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:59:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-11-25 18:59:07,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 56 [2021-11-25 18:59:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:07,230 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-11-25 18:59:07,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:59:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-11-25 18:59:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 18:59:07,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:07,232 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:07,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:59:07,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1781169230, now seen corresponding path program 1 times [2021-11-25 18:59:07,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:07,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405347975] [2021-11-25 18:59:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:07,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 18:59:07,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:07,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405347975] [2021-11-25 18:59:07,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405347975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:59:07,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014159467] [2021-11-25 18:59:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:07,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:07,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:07,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:07,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:59:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:59:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-25 18:59:07,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014159467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:07,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:59:07,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-25 18:59:07,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561330522] [2021-11-25 18:59:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:07,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:59:07,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:59:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:07,599 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:59:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:07,762 INFO L93 Difference]: Finished difference Result 198 states and 254 transitions. [2021-11-25 18:59:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:59:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-11-25 18:59:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:07,765 INFO L225 Difference]: With dead ends: 198 [2021-11-25 18:59:07,765 INFO L226 Difference]: Without dead ends: 116 [2021-11-25 18:59:07,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:07,770 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:07,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 96 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:59:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-25 18:59:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-11-25 18:59:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 59 states have internal predecessors, (67), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 18:59:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2021-11-25 18:59:07,795 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 56 [2021-11-25 18:59:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:07,796 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2021-11-25 18:59:07,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 18:59:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2021-11-25 18:59:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:59:07,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:07,798 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:07,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:59:08,012 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash 215528780, now seen corresponding path program 1 times [2021-11-25 18:59:08,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:08,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213390781] [2021-11-25 18:59:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:08,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-25 18:59:08,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213390781] [2021-11-25 18:59:08,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213390781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:59:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079136492] [2021-11-25 18:59:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:08,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:08,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:59:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:59:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-25 18:59:08,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-25 18:59:08,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079136492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242004233] [2021-11-25 18:59:08,655 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:59:08,656 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:59:08,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:59:08,665 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:59:08,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:59:11,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2021-11-25 18:59:11,552 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:59:12,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4829#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:59:12,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:59:12,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:59:12,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-25 18:59:12,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325431555] [2021-11-25 18:59:12,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:59:12,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:59:12,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:59:12,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:59:12,454 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 18:59:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:12,684 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2021-11-25 18:59:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:59:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 77 [2021-11-25 18:59:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:12,686 INFO L225 Difference]: With dead ends: 120 [2021-11-25 18:59:12,686 INFO L226 Difference]: Without dead ends: 118 [2021-11-25 18:59:12,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:59:12,688 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 42 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:12,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 222 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:59:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-25 18:59:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2021-11-25 18:59:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-25 18:59:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-11-25 18:59:12,703 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 77 [2021-11-25 18:59:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:12,704 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-11-25 18:59:12,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 18:59:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-11-25 18:59:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 18:59:12,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:12,706 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:12,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:12,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:12,924 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:59:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash 744962560, now seen corresponding path program 1 times [2021-11-25 18:59:12,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:59:12,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915764444] [2021-11-25 18:59:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:12,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:59:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-25 18:59:13,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:59:13,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915764444] [2021-11-25 18:59:13,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915764444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:59:13,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323442373] [2021-11-25 18:59:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:13,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:13,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:13,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:59:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:59:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 51 proven. 38 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-25 18:59:13,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 51 proven. 38 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-25 18:59:13,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323442373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:13,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86584227] [2021-11-25 18:59:13,561 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:59:13,562 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:59:13,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:59:13,562 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:59:13,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:59:20,165 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2021-11-25 18:59:20,175 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:59:21,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5761#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:59:21,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:59:21,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:59:21,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2021-11-25 18:59:21,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581521885] [2021-11-25 18:59:21,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:59:21,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:59:21,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:59:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:59:21,390 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-25 18:59:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:22,211 INFO L93 Difference]: Finished difference Result 235 states and 346 transitions. [2021-11-25 18:59:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:59:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) Word has length 98 [2021-11-25 18:59:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:22,213 INFO L225 Difference]: With dead ends: 235 [2021-11-25 18:59:22,213 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:59:22,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 268 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:59:22,216 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:22,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 326 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:59:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:59:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:59:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:59:22,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-11-25 18:59:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:22,218 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:59:22,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 5 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-25 18:59:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:59:22,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:59:22,221 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:59:22,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:22,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:59:22,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 18:59:44,308 WARN L227 SmtUtils]: Spent 20.80s on a formula simplification. DAG size of input: 94 DAG size of output: 94 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 18:59:50,435 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 87 DAG size of output: 87 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 19:00:11,202 WARN L227 SmtUtils]: Spent 20.51s on a formula simplification. DAG size of input: 94 DAG size of output: 94 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 19:00:17,330 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 87 DAG size of output: 87 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-25 19:00:20,850 INFO L854 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (or (<= 1 |ULTIMATE.start_main_~i~0#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,850 INFO L854 garLoopResultBuilder]: At program point L64-1(line 64) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (or (<= 1 |ULTIMATE.start_main_~i~0#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,850 INFO L854 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 2 |ULTIMATE.start_main_~l~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (or (<= 1 |ULTIMATE.start_main_~i~0#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))))) [2021-11-25 19:00:20,850 INFO L858 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2021-11-25 19:00:20,850 INFO L854 garLoopResultBuilder]: At program point L60-1(line 60) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 2 |ULTIMATE.start_main_~l~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (or (<= 1 |ULTIMATE.start_main_~i~0#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))))) [2021-11-25 19:00:20,851 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,851 INFO L854 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,851 INFO L858 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2021-11-25 19:00:20,851 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,852 INFO L854 garLoopResultBuilder]: At program point L40-1(line 40) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,852 INFO L861 garLoopResultBuilder]: At program point L69(lines 24 70) the Hoare annotation is: true [2021-11-25 19:00:20,852 INFO L858 garLoopResultBuilder]: For program point L65(line 65) no Hoare annotation was computed. [2021-11-25 19:00:20,852 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:00:20,852 INFO L858 garLoopResultBuilder]: For program point L61(line 61) no Hoare annotation was computed. [2021-11-25 19:00:20,852 INFO L854 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,853 INFO L858 garLoopResultBuilder]: For program point L49(lines 49 51) no Hoare annotation was computed. [2021-11-25 19:00:20,853 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,853 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:00:20,853 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,854 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,854 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 58) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= (div (* |ULTIMATE.start_main_~j~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,854 INFO L858 garLoopResultBuilder]: For program point L38-3(lines 35 68) no Hoare annotation was computed. [2021-11-25 19:00:20,854 INFO L858 garLoopResultBuilder]: For program point L59-1(lines 24 70) no Hoare annotation was computed. [2021-11-25 19:00:20,854 INFO L858 garLoopResultBuilder]: For program point L55(line 55) no Hoare annotation was computed. [2021-11-25 19:00:20,854 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,855 INFO L858 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2021-11-25 19:00:20,855 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 46) no Hoare annotation was computed. [2021-11-25 19:00:20,855 INFO L854 garLoopResultBuilder]: At program point L39-1(lines 39 46) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~n~0#1|))) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (<= (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~i~0#1|) 1) (+ .cse0 |ULTIMATE.start_main_~j~0#1|)) (let ((.cse1 (* 2 |ULTIMATE.start_main_~l~0#1|))) (or (<= .cse1 (+ 2 |ULTIMATE.start_main_~n~0#1|)) (<= (+ |ULTIMATE.start_main_~r~0#1| .cse1) .cse0))) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~l~0#1|))) [2021-11-25 19:00:20,855 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-11-25 19:00:20,855 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-11-25 19:00:20,856 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-11-25 19:00:20,856 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-25 19:00:20,856 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-25 19:00:20,856 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-25 19:00:20,859 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:20,861 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:00:20,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:00:20 BoogieIcfgContainer [2021-11-25 19:00:20,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:00:20,875 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:00:20,875 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:00:20,875 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:00:20,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:59:03" (3/4) ... [2021-11-25 19:00:20,878 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:00:20,883 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-25 19:00:20,888 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-25 19:00:20,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-25 19:00:20,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 19:00:20,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:00:20,890 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:00:20,935 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:00:20,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:00:20,936 INFO L158 Benchmark]: Toolchain (without parser) took 78519.02ms. Allocated memory was 113.2MB in the beginning and 522.2MB in the end (delta: 408.9MB). Free memory was 76.7MB in the beginning and 378.7MB in the end (delta: -302.0MB). Peak memory consumption was 105.0MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,937 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:00:20,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.25ms. Allocated memory is still 113.2MB. Free memory was 76.6MB in the beginning and 89.8MB in the end (delta: -13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.90ms. Allocated memory is still 113.2MB. Free memory was 89.8MB in the beginning and 88.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,937 INFO L158 Benchmark]: Boogie Preprocessor took 34.76ms. Allocated memory is still 113.2MB. Free memory was 88.0MB in the beginning and 87.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,938 INFO L158 Benchmark]: RCFGBuilder took 422.06ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 74.7MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,938 INFO L158 Benchmark]: TraceAbstraction took 77592.41ms. Allocated memory was 113.2MB in the beginning and 522.2MB in the end (delta: 408.9MB). Free memory was 74.4MB in the beginning and 381.8MB in the end (delta: -307.4MB). Peak memory consumption was 298.7MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,938 INFO L158 Benchmark]: Witness Printer took 61.03ms. Allocated memory is still 522.2MB. Free memory was 381.8MB in the beginning and 378.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:00:20,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.25ms. Allocated memory is still 113.2MB. Free memory was 76.6MB in the beginning and 89.8MB in the end (delta: -13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.90ms. Allocated memory is still 113.2MB. Free memory was 89.8MB in the beginning and 88.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.76ms. Allocated memory is still 113.2MB. Free memory was 88.0MB in the beginning and 87.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 422.06ms. Allocated memory is still 113.2MB. Free memory was 87.0MB in the beginning and 74.7MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 77592.41ms. Allocated memory was 113.2MB in the beginning and 522.2MB in the end (delta: 408.9MB). Free memory was 74.4MB in the beginning and 381.8MB in the end (delta: -307.4MB). Peak memory consumption was 298.7MB. Max. memory is 16.1GB. * Witness Printer took 61.03ms. Allocated memory is still 522.2MB. Free memory was 381.8MB in the beginning and 378.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 77.5s, OverallIterations: 16, TraceHistogramMax: 17, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 58.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 601 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 471 mSDsluCounter, 2984 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2348 mSDsCounter, 652 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2135 IncrementalHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 652 mSolverCounterUnsat, 748 mSDtfsCounter, 2135 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 727 GetRequests, 558 SyntacticMatches, 13 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=12, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 287 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 151 PreInvPairs, 261 NumberOfFragments, 801 HoareAnnotationTreeSize, 151 FomulaSimplifications, 116368 FormulaSimplificationTreeSizeReduction, 56.5s HoareSimplificationTime, 17 FomulaSimplificationsInter, 1026967 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 748 NumberOfCodeBlocks, 748 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 902 ConstructedInterpolants, 0 QuantifiedInterpolants, 1836 SizeOfPredicates, 9 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 2915/3023 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((((j * -1 / -2 <= i && 2 <= r) && r <= n) && 2 <= j) && r + 2 * i + 1 <= 2 * n + j) && (2 * l <= 2 + n || r + 2 * l <= 2 * n)) && 1 <= l RESULT: Ultimate proved your program to be correct! [2021-11-25 19:00:20,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72b09b63-f6ff-43ba-b1cb-adbb600f9468/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE