./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl --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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:25:22,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:25:22,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:25:22,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:25:22,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:25:22,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:25:22,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:25:22,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:25:22,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:25:22,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:25:22,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:25:22,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:25:22,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:25:22,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:25:22,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:25:22,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:25:22,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:25:22,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:25:22,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:25:22,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:25:22,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:25:22,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:25:22,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:25:22,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:25:22,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:25:22,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:25:22,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:25:22,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:25:22,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:25:22,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:25:22,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:25:22,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:25:22,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:25:22,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:25:22,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:25:22,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:25:22,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:25:22,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:25:22,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:25:22,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:25:22,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:25:22,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:25:22,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:25:22,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:25:22,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:25:22,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:25:22,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:25:22,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:25:22,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:25:22,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:25:22,954 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:25:22,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:25:22,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:25:22,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:25:22,955 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:25:22,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:25:22,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:25:22,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:25:22,955 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:25:22,956 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:25:22,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:25:22,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:25:22,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:25:22,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:25:22,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:25:22,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:25:22,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:25:22,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:25:22,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:25:22,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:25:22,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:25:22,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:25:22,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:25:22,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:25:22,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:22,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:25:22,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:25:22,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:25:22,960 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:25:22,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:25:22,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:25:22,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:25:22,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:25:22,961 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_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2021-11-23 17:25:23,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:25:23,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:25:23,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:25:23,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:25:23,248 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:25:23,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2021-11-23 17:25:23,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/73a659d4f/749b6954fc9e485e8accb8c329d99eca/FLAGe16893deb [2021-11-23 17:25:23,827 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:25:23,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2021-11-23 17:25:23,834 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/73a659d4f/749b6954fc9e485e8accb8c329d99eca/FLAGe16893deb [2021-11-23 17:25:24,232 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/73a659d4f/749b6954fc9e485e8accb8c329d99eca [2021-11-23 17:25:24,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:25:24,236 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:25:24,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:24,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:25:24,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:25:24,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1339e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24, skipping insertion in model container [2021-11-23 17:25:24,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:25:24,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:25:24,415 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_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2021-11-23 17:25:24,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:24,439 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:25:24,451 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_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2021-11-23 17:25:24,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:24,472 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:25:24,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24 WrapperNode [2021-11-23 17:25:24,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:24,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:24,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:25:24,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:25:24,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,508 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2021-11-23 17:25:24,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:24,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:25:24,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:25:24,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:25:24,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:25:24,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:25:24,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:25:24,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:25:24,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:24" (1/1) ... [2021-11-23 17:25:24,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:24,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:25:24,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:25:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:25:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:25:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:25:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:25:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:25:24,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:25:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:25:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:25:24,682 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:25:24,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:25:24,842 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:25:24,865 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:25:24,870 INFO L158 Benchmark]: Toolchain (without parser) took 632.45ms. Allocated memory is still 90.2MB. Free memory was 59.5MB in the beginning and 35.7MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-23 17:25:24,871 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory is still 58.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:25:24,872 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.93ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 49.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:25:24,873 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.38ms. Allocated memory is still 90.2MB. Free memory was 49.2MB in the beginning and 47.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:25:24,874 INFO L158 Benchmark]: Boogie Preprocessor took 25.57ms. Allocated memory is still 90.2MB. Free memory was 47.6MB in the beginning and 46.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:25:24,875 INFO L158 Benchmark]: RCFGBuilder took 332.25ms. Allocated memory is still 90.2MB. Free memory was 46.4MB in the beginning and 35.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:25:24,880 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory is still 58.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.93ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 49.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.38ms. Allocated memory is still 90.2MB. Free memory was 49.2MB in the beginning and 47.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.57ms. Allocated memory is still 90.2MB. Free memory was 47.6MB in the beginning and 46.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 332.25ms. Allocated memory is still 90.2MB. Free memory was 46.4MB in the beginning and 35.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:25:24,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl --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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:25:27,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:25:27,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:25:27,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:25:27,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:25:27,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:25:27,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:25:27,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:25:27,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:25:27,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:25:27,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:25:27,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:25:27,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:25:27,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:25:27,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:25:27,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:25:27,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:25:27,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:25:27,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:25:27,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:25:27,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:25:27,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:25:27,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:25:27,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:25:27,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:25:27,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:25:27,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:25:27,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:25:27,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:25:27,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:25:27,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:25:27,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:25:27,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:25:27,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:25:27,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:25:27,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:25:27,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:25:27,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:25:27,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:25:27,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:25:27,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:25:27,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:25:27,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:25:27,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:25:27,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:25:27,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:25:27,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:25:27,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:25:27,664 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:25:27,664 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:25:27,664 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:25:27,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:25:27,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:25:27,666 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:25:27,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:25:27,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:25:27,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:25:27,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:25:27,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:25:27,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:25:27,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:25:27,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:25:27,669 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:25:27,669 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:25:27,669 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:25:27,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:25:27,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:25:27,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:25:27,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:25:27,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:25:27,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:25:27,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:27,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:25:27,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:25:27,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:25:27,672 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:25:27,672 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:27,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:25:27,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:25:27,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:25:27,673 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2021-11-23 17:25:28,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:25:28,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:25:28,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:25:28,096 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:25:28,097 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:25:28,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2021-11-23 17:25:28,182 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/03c2c3488/a32f79441ce647b8866bc783623afb16/FLAG19aa837b7 [2021-11-23 17:25:28,799 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:25:28,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2021-11-23 17:25:28,808 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/03c2c3488/a32f79441ce647b8866bc783623afb16/FLAG19aa837b7 [2021-11-23 17:25:29,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/data/03c2c3488/a32f79441ce647b8866bc783623afb16 [2021-11-23 17:25:29,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:25:29,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:25:29,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:29,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:25:29,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:25:29,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@847b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29, skipping insertion in model container [2021-11-23 17:25:29,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:25:29,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:25:29,305 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_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2021-11-23 17:25:29,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:29,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:25:29,348 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_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2021-11-23 17:25:29,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:29,372 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:25:29,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29 WrapperNode [2021-11-23 17:25:29,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:29,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:29,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:25:29,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:25:29,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,412 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2021-11-23 17:25:29,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:29,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:25:29,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:25:29,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:25:29,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:25:29,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:25:29,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:25:29,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:25:29,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (1/1) ... [2021-11-23 17:25:29,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:29,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:25:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:25:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:25:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:25:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:25:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:25:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:25:29,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:25:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:25:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:25:29,602 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:25:29,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:25:29,832 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:25:29,839 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:25:29,839 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 17:25:29,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:29 BoogieIcfgContainer [2021-11-23 17:25:29,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:25:29,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:25:29,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:25:29,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:25:29,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:25:29" (1/3) ... [2021-11-23 17:25:29,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505f9f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:29, skipping insertion in model container [2021-11-23 17:25:29,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:29" (2/3) ... [2021-11-23 17:25:29,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505f9f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:29, skipping insertion in model container [2021-11-23 17:25:29,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:29" (3/3) ... [2021-11-23 17:25:29,850 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2021-11-23 17:25:29,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:25:29,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:25:29,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:25:29,943 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 [2021-11-23 17:25:29,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:25:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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) [2021-11-23 17:25:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:25:29,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:29,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:29,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2021-11-23 17:25:29,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:29,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296388827] [2021-11-23 17:25:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:29,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:30,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:30,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:25:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:25:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:30,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:30,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296388827] [2021-11-23 17:25:30,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296388827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:30,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:30,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:30,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124331750] [2021-11-23 17:25:30,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:25:30,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:25:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:25:30,203 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:30,219 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2021-11-23 17:25:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:25:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 17:25:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:30,230 INFO L225 Difference]: With dead ends: 40 [2021-11-23 17:25:30,231 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 17:25:30,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:25:30,238 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:30,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 17:25:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 17:25:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-11-23 17:25:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-23 17:25:30,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2021-11-23 17:25:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:30,281 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-23 17:25:30,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-23 17:25:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:25:30,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:30,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:30,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:30,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:30,494 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:30,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1883645503, now seen corresponding path program 1 times [2021-11-23 17:25:30,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:30,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256229421] [2021-11-23 17:25:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:30,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:30,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:30,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:25:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:30,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:30,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:30,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256229421] [2021-11-23 17:25:30,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256229421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:30,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:30,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:30,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041861977] [2021-11-23 17:25:30,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:30,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:30,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:30,646 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:30,664 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-11-23 17:25:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:30,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 17:25:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:30,667 INFO L225 Difference]: With dead ends: 34 [2021-11-23 17:25:30,668 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:25:30,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:30,670 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:30,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:25:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-23 17:25:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-23 17:25:30,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-23 17:25:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:30,682 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-23 17:25:30,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-23 17:25:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:25:30,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:30,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:30,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:30,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:30,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:30,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2021-11-23 17:25:30,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:30,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580609994] [2021-11-23 17:25:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:30,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:30,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:30,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:25:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:30,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:31,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:31,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:31,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580609994] [2021-11-23 17:25:31,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580609994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:31,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283289635] [2021-11-23 17:25:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:31,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:31,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:31,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:25:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:31,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:31,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [283289635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:31,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552471284] [2021-11-23 17:25:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:31,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:31,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:31,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:31,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:25:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:31,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:25:31,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552471284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:31,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:25:31,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 7 [2021-11-23 17:25:31,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199799836] [2021-11-23 17:25:31,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:31,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:31,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:31,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:25:31,380 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:31,448 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-23 17:25:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 17:25:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:31,450 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:25:31,450 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 17:25:31,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:25:31,453 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:31,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:25:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 17:25:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-23 17:25:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-11-23 17:25:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-23 17:25:31,459 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-11-23 17:25:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:31,459 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-23 17:25:31,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-23 17:25:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:25:31,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:31,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:31,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:25:31,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:31,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:32,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:32,062 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2021-11-23 17:25:32,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967910736] [2021-11-23 17:25:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:32,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:32,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:32,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:25:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:32,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:32,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:32,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967910736] [2021-11-23 17:25:32,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967910736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:32,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [559017787] [2021-11-23 17:25:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:32,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:32,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:32,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:32,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:25:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:32,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:32,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [559017787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303177930] [2021-11-23 17:25:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:32,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:32,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:32,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:32,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:25:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:32,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:32,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303177930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:32,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:32,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2021-11-23 17:25:32,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121140047] [2021-11-23 17:25:32,734 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:32,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:25:32,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:25:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:25:32,737 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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) [2021-11-23 17:25:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:32,980 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2021-11-23 17:25:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:25:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 18 [2021-11-23 17:25:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:32,982 INFO L225 Difference]: With dead ends: 61 [2021-11-23 17:25:32,982 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 17:25:32,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:25:32,985 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:32,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 78 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:25:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 17:25:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 17:25:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 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) [2021-11-23 17:25:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-23 17:25:32,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2021-11-23 17:25:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:32,994 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-23 17:25:32,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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) [2021-11-23 17:25:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-23 17:25:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 17:25:32,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:32,996 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:33,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:33,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 17:25:33,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:33,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1723847351, now seen corresponding path program 2 times [2021-11-23 17:25:33,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:33,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73149437] [2021-11-23 17:25:33,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:25:33,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:33,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:33,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:25:33,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:25:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:33,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 17:25:33,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 17:25:34,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73149437] [2021-11-23 17:25:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73149437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180161494] [2021-11-23 17:25:34,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:25:34,067 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:34,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:34,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:25:34,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:25:34,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:34,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 17:25:34,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 17:25:34,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1180161494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:34,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575109173] [2021-11-23 17:25:34,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:25:34,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:34,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:34,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:34,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:25:34,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:25:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 17:25:34,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 17:25:35,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575109173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:35,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:35,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 22 [2021-11-23 17:25:35,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762209735] [2021-11-23 17:25:35,006 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:35,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:25:35,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:35,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:25:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:25:35,029 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 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) [2021-11-23 17:25:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:36,293 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2021-11-23 17:25:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 17:25:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 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 42 [2021-11-23 17:25:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:36,295 INFO L225 Difference]: With dead ends: 127 [2021-11-23 17:25:36,295 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 17:25:36,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 17:25:36,298 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 235 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:36,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 262 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:25:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 17:25:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-23 17:25:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 92 states have internal predecessors, (116), 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) [2021-11-23 17:25:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2021-11-23 17:25:36,311 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 42 [2021-11-23 17:25:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:36,311 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2021-11-23 17:25:36,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 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) [2021-11-23 17:25:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2021-11-23 17:25:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 17:25:36,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:36,315 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:36,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-23 17:25:36,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:36,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:36,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:36,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash -29040235, now seen corresponding path program 3 times [2021-11-23 17:25:36,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812219221] [2021-11-23 17:25:36,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:25:36,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:36,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:36,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:25:37,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:25:37,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:37,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:25:37,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:25:38,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:38,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812219221] [2021-11-23 17:25:38,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812219221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:38,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935108338] [2021-11-23 17:25:38,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:25:38,327 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:38,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:38,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:38,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:25:39,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:25:39,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:25:39,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:25:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935108338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:39,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778918838] [2021-11-23 17:25:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:25:39,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:39,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:39,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:25:43,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:25:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:25:43,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:25:44,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778918838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:44,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:44,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 14] total 34 [2021-11-23 17:25:44,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956483499] [2021-11-23 17:25:44,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:44,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 17:25:44,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 17:25:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=771, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:25:44,716 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 34 states, 34 states have (on average 4.470588235294118) internal successors, (152), 34 states have internal predecessors, (152), 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) [2021-11-23 17:25:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:47,457 INFO L93 Difference]: Finished difference Result 204 states and 286 transitions. [2021-11-23 17:25:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:25:47,459 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.470588235294118) internal successors, (152), 34 states have internal predecessors, (152), 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 90 [2021-11-23 17:25:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:47,461 INFO L225 Difference]: With dead ends: 204 [2021-11-23 17:25:47,461 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 17:25:47,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=671, Invalid=1309, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 17:25:47,463 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1187 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:47,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 421 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:25:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 17:25:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-23 17:25:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2926829268292683) internal successors, (212), 164 states have internal predecessors, (212), 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) [2021-11-23 17:25:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2021-11-23 17:25:47,500 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 90 [2021-11-23 17:25:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:47,501 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2021-11-23 17:25:47,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.470588235294118) internal successors, (152), 34 states have internal predecessors, (152), 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) [2021-11-23 17:25:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2021-11-23 17:25:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-23 17:25:47,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:47,514 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:47,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:47,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:47,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:48,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:48,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:48,129 INFO L85 PathProgramCache]: Analyzing trace with hash 759393045, now seen corresponding path program 4 times [2021-11-23 17:25:48,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:48,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655736782] [2021-11-23 17:25:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:25:48,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:48,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:48,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:25:48,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:25:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 17:25:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 17:25:49,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655736782] [2021-11-23 17:25:49,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655736782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [236056431] [2021-11-23 17:25:49,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:25:49,328 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:49,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:49,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:49,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:25:49,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:25:49,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 17:25:50,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 17:25:50,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [236056431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228903635] [2021-11-23 17:25:50,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:25:50,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:50,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:50,347 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:50,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:25:50,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:25:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:50,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 17:25:50,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-11-23 17:25:51,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228903635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:51,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:51,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-23 17:25:51,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758370244] [2021-11-23 17:25:51,164 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:51,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:25:51,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:25:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:25:51,167 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2021-11-23 17:25:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:52,260 INFO L93 Difference]: Finished difference Result 331 states and 436 transitions. [2021-11-23 17:25:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:25:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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 162 [2021-11-23 17:25:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:52,279 INFO L225 Difference]: With dead ends: 331 [2021-11-23 17:25:52,279 INFO L226 Difference]: Without dead ends: 189 [2021-11-23 17:25:52,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:25:52,287 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:52,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 249 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:25:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-23 17:25:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-23 17:25:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.2553191489361701) internal successors, (236), 188 states have internal predecessors, (236), 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) [2021-11-23 17:25:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2021-11-23 17:25:52,320 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 162 [2021-11-23 17:25:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:52,322 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2021-11-23 17:25:52,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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) [2021-11-23 17:25:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2021-11-23 17:25:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-23 17:25:52,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:52,330 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:52,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:52,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:52,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 17:25:52,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:52,934 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1425272787, now seen corresponding path program 5 times [2021-11-23 17:25:52,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:52,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435782650] [2021-11-23 17:25:52,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:25:52,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:52,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:52,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:25:54,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-23 17:25:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:25:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-11-23 17:25:55,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-11-23 17:25:56,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:56,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435782650] [2021-11-23 17:25:56,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435782650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:56,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019539039] [2021-11-23 17:25:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:25:56,981 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:56,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:56,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_260f75c1-ed6d-47b0-8d4f-84956dfcfd6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process