./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/cggmp2005_variant.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/cggmp2005_variant.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE --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 d63924edab54dab3adf6fc30d0dae54d46ed57e9ae48bc8d03de12421cfd3603 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:26:45,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:26:45,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:26:46,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:26:46,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:26:46,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:26:46,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:26:46,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:26:46,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:26:46,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:26:46,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:26:46,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:26:46,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:26:46,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:26:46,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:26:46,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:26:46,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:26:46,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:26:46,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:26:46,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:26:46,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:26:46,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:26:46,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:26:46,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:26:46,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:26:46,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:26:46,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:26:46,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:26:46,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:26:46,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:26:46,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:26:46,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:26:46,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:26:46,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:26:46,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:26:46,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:26:46,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:26:46,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:26:46,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:26:46,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:26:46,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:26:46,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:26:46,136 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:26:46,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:26:46,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:26:46,139 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:26:46,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:26:46,140 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:26:46,140 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:26:46,140 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:26:46,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:26:46,141 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:26:46,148 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:26:46,148 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:26:46,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:26:46,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:26:46,149 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:26:46,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:26:46,151 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:26:46,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:26:46,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:26:46,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:26:46,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:26:46,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:26:46,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:26:46,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:26:46,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:26:46,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:26:46,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:26:46,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:26:46,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:26:46,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:26:46,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:26:46,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:26:46,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:26:46,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:26:46,157 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:26:46,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:26:46,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:26:46,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:26:46,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:26:46,159 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_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63924edab54dab3adf6fc30d0dae54d46ed57e9ae48bc8d03de12421cfd3603 [2021-10-24 10:26:46,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:26:46,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:26:46,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:26:46,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:26:46,530 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:26:46,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/loop-lit/cggmp2005_variant.i [2021-10-24 10:26:46,604 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/data/0c4a56ed7/d44c10703b9d4e08829918ae7ac7fbd0/FLAG7104e86e7 [2021-10-24 10:26:47,101 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:26:47,103 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/sv-benchmarks/c/loop-lit/cggmp2005_variant.i [2021-10-24 10:26:47,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/data/0c4a56ed7/d44c10703b9d4e08829918ae7ac7fbd0/FLAG7104e86e7 [2021-10-24 10:26:47,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/data/0c4a56ed7/d44c10703b9d4e08829918ae7ac7fbd0 [2021-10-24 10:26:47,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:26:47,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:26:47,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:26:47,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:26:47,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:26:47,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20886e87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47, skipping insertion in model container [2021-10-24 10:26:47,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:26:47,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:26:47,734 WARN L228 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_1de179c5-5c55-43c4-a7ae-7ffc6a586605/sv-benchmarks/c/loop-lit/cggmp2005_variant.i[895,908] [2021-10-24 10:26:47,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:26:47,753 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:26:47,765 WARN L228 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_1de179c5-5c55-43c4-a7ae-7ffc6a586605/sv-benchmarks/c/loop-lit/cggmp2005_variant.i[895,908] [2021-10-24 10:26:47,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:26:47,787 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:26:47,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47 WrapperNode [2021-10-24 10:26:47,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:26:47,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:26:47,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:26:47,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:26:47,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:26:47,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:26:47,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:26:47,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:26:47,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:26:47,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:26:47,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:26:47,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:26:47,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (1/1) ... [2021-10-24 10:26:47,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:26:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:26:47,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:26:47,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:26:47,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:26:47,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:26:47,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:26:47,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:26:48,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:26:48,136 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-24 10:26:48,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:26:48 BoogieIcfgContainer [2021-10-24 10:26:48,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:26:48,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:26:48,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:26:48,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:26:48,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:26:47" (1/3) ... [2021-10-24 10:26:48,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7ba0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:26:48, skipping insertion in model container [2021-10-24 10:26:48,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:26:47" (2/3) ... [2021-10-24 10:26:48,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7ba0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:26:48, skipping insertion in model container [2021-10-24 10:26:48,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:26:48" (3/3) ... [2021-10-24 10:26:48,163 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2021-10-24 10:26:48,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:26:48,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:26:48,263 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:26:48,270 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 [2021-10-24 10:26:48,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:26:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-10-24 10:26:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:26:48,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:26:48,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:26:48,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:26:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:26:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash 61198179, now seen corresponding path program 1 times [2021-10-24 10:26:48,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:26:48,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318779437] [2021-10-24 10:26:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:26:48,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:26:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:26:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:48,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:26:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318779437] [2021-10-24 10:26:48,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318779437] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:26:48,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:26:48,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:26:48,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798995369] [2021-10-24 10:26:48,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:26:48,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:26:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:26:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:26:48,590 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:26:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:26:48,627 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-10-24 10:26:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:26:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 10:26:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:26:48,637 INFO L225 Difference]: With dead ends: 16 [2021-10-24 10:26:48,638 INFO L226 Difference]: Without dead ends: 7 [2021-10-24 10:26:48,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:26:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-24 10:26:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-24 10:26:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:26:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-24 10:26:48,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-24 10:26:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:26:48,673 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-24 10:26:48,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:26:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-24 10:26:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:26:48,674 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:26:48,675 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:26:48,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:26:48,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:26:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:26:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1896502525, now seen corresponding path program 1 times [2021-10-24 10:26:48,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:26:48,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938557207] [2021-10-24 10:26:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:26:48,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:26:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:26:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:48,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:26:48,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938557207] [2021-10-24 10:26:48,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938557207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:26:48,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792422687] [2021-10-24 10:26:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:26:48,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:26:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:26:48,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:26:48,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:26:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:26:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-24 10:26:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:26:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:49,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:26:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792422687] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:26:49,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541687446] [2021-10-24 10:26:49,314 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-24 10:26:49,318 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:26:49,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:26:49,328 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:26:49,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:26:49,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,372 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:26:49,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:26:49,378 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:26:49,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,381 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:26:49,384 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-24 10:26:49,408 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-10-24 10:26:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:49,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:26:49,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:26:49,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:26:49,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:26:49,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:49,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:49,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-24 10:26:49,523 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:26:49,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:26:49,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:26:49,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:49,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 10:26:49,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:26:49,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:97, output treesize:82 [2021-10-24 10:26:49,588 INFO L180 QuantifierPusher]: treesize reduction 8, result has 92.7 percent of original size [2021-10-24 10:26:49,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-24 10:26:49,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,737 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.9 percent of original size [2021-10-24 10:26:49,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-24 10:26:49,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,864 INFO L180 QuantifierPusher]: treesize reduction 29, result has 65.5 percent of original size [2021-10-24 10:26:49,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 10:26:49,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,941 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.8 percent of original size [2021-10-24 10:26:49,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 10:26:49,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:49,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:50,006 INFO L180 QuantifierPusher]: treesize reduction 29, result has 63.3 percent of original size [2021-10-24 10:26:50,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-24 10:26:50,025 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:26:50,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:26:50,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:26:50,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-10-24 10:26:50,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210994482] [2021-10-24 10:26:50,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:26:50,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:26:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:26:50,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:26:50,408 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-10-24 10:26:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:26:50,451 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-24 10:26:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:26:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 10:26:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:26:50,452 INFO L225 Difference]: With dead ends: 11 [2021-10-24 10:26:50,452 INFO L226 Difference]: Without dead ends: 8 [2021-10-24 10:26:50,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:26:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-24 10:26:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-24 10:26:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-10-24 10:26:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-24 10:26:50,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-24 10:26:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:26:50,457 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-24 10:26:50,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-10-24 10:26:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-24 10:26:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 10:26:50,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:26:50,458 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-24 10:26:50,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:26:50,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:26:50,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:26:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:26:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1338604893, now seen corresponding path program 2 times [2021-10-24 10:26:50,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:26:50,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757328128] [2021-10-24 10:26:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:26:50,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:26:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:26:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:50,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:26:50,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757328128] [2021-10-24 10:26:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757328128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:26:50,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280130001] [2021-10-24 10:26:50,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:26:50,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:26:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:26:50,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:26:50,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:26:50,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 10:26:50,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:26:50,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-24 10:26:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:26:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:26:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:26:51,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280130001] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:26:51,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561187235] [2021-10-24 10:26:51,385 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-24 10:26:51,386 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:26:51,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:26:51,386 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:26:51,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:26:51,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,395 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:26:51,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:26:51,397 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:26:51,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:26:51,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-10-24 10:26:51,404 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-10-24 10:26:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:51,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 10:26:51,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:26:51,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 10:26:51,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:26:51,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:26:51,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-24 10:26:51,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:26:51,442 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:26:51,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:26:51,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:26:51,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-10-24 10:26:51,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:26:51,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:97, output treesize:82 [2021-10-24 10:26:51,464 INFO L180 QuantifierPusher]: treesize reduction 8, result has 92.7 percent of original size [2021-10-24 10:26:51,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-24 10:26:51,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,506 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.9 percent of original size [2021-10-24 10:26:51,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-10-24 10:26:51,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,589 INFO L180 QuantifierPusher]: treesize reduction 29, result has 65.5 percent of original size [2021-10-24 10:26:51,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 10:26:51,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,617 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.8 percent of original size [2021-10-24 10:26:51,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-24 10:26:51,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:51,645 INFO L180 QuantifierPusher]: treesize reduction 29, result has 63.3 percent of original size [2021-10-24 10:26:51,647 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-24 10:26:51,652 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:26:51,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:26:51,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:26:51,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-10-24 10:26:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572262118] [2021-10-24 10:26:51,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 10:26:51,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:26:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 10:26:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-24 10:26:51,975 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:26:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:26:52,152 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2021-10-24 10:26:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:26:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-24 10:26:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:26:52,153 INFO L225 Difference]: With dead ends: 10 [2021-10-24 10:26:52,153 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:26:52,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-10-24 10:26:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:26:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:26:52,154 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) [2021-10-24 10:26:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:26:52,154 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-10-24 10:26:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:26:52,154 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:26:52,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:26:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:26:52,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:26:52,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:26:52,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:26:52,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:26:52,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:26:52,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:52,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:52,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:26:52,403 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:26:52,403 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-24 10:26:52,403 INFO L860 garLoopResultBuilder]: At program point L36(lines 24 37) the Hoare annotation is: true [2021-10-24 10:26:52,403 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:26:52,404 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-24 10:26:52,404 INFO L853 garLoopResultBuilder]: At program point L30-2(lines 30 34) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~lo~0 (* 2 ULTIMATE.start_main_~mid~0)))) (and (<= ULTIMATE.start_main_~hi~0 .cse0) (< ULTIMATE.start_main_~lo~0 (+ ULTIMATE.start_main_~hi~0 1)) (<= .cse0 ULTIMATE.start_main_~hi~0))) [2021-10-24 10:26:52,404 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-24 10:26:52,405 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-24 10:26:52,405 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-24 10:26:52,410 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:26:52,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:26:52 BoogieIcfgContainer [2021-10-24 10:26:52,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:26:52,431 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:26:52,431 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:26:52,431 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:26:52,432 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:26:48" (3/4) ... [2021-10-24 10:26:52,435 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:26:52,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-24 10:26:52,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-24 10:26:52,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:26:52,445 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:26:52,486 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:26:52,486 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:26:52,487 INFO L168 Benchmark]: Toolchain (without parser) took 5019.68 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 66.6 MB in the beginning and 98.9 MB in the end (delta: -32.3 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,488 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 77.6 MB. Free memory was 51.6 MB in the beginning and 51.6 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:26:52,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.51 ms. Allocated memory is still 100.7 MB. Free memory was 66.3 MB in the beginning and 76.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.52 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,489 INFO L168 Benchmark]: Boogie Preprocessor took 32.07 ms. Allocated memory is still 100.7 MB. Free memory was 75.2 MB in the beginning and 74.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,489 INFO L168 Benchmark]: RCFGBuilder took 298.42 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 64.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,490 INFO L168 Benchmark]: TraceAbstraction took 4273.40 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 63.6 MB in the beginning and 42.8 MB in the end (delta: 20.8 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,490 INFO L168 Benchmark]: Witness Printer took 55.48 ms. Allocated memory is still 123.7 MB. Free memory was 42.8 MB in the beginning and 98.9 MB in the end (delta: -56.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:26:52,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 77.6 MB. Free memory was 51.6 MB in the beginning and 51.6 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.51 ms. Allocated memory is still 100.7 MB. Free memory was 66.3 MB in the beginning and 76.6 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.52 ms. Allocated memory is still 100.7 MB. Free memory was 76.6 MB in the beginning and 75.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.07 ms. Allocated memory is still 100.7 MB. Free memory was 75.2 MB in the beginning and 74.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 298.42 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 64.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4273.40 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 63.6 MB in the beginning and 42.8 MB in the end (delta: 20.8 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. * Witness Printer took 55.48 ms. Allocated memory is still 123.7 MB. Free memory was 42.8 MB in the beginning and 98.9 MB in the end (delta: -56.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4148.1ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 21.4ms, AutomataDifference: 297.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 35.4ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15 SDtfs, 9 SDslu, 16 SDs, 0 SdLazy, 48 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1085.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 22 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 4.4ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 103 FormulaSimplificationTreeSizeReductionInter, 25.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 17.3ms SsaConstructionTime, 153.9ms SatisfiabilityAnalysisTime, 1230.9ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 274 SizeOfPredicates, 10 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/12 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: 30]: Loop Invariant Derived loop invariant: (hi <= lo + 2 * mid && lo < hi + 1) && lo + 2 * mid <= hi - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-24 10:26:52,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de179c5-5c55-43c4-a7ae-7ffc6a586605/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...