./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 185af411ffb66b9762afca1cabf119211700e2cdb0b48054cece4906f7290e44 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:42,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:42,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:42,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:42,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:42,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:42,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:42,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:42,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:42,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:42,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:42,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:42,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:42,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:42,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:42,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:42,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:42,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:42,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:42,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:42,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:42,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:42,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:42,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:42,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:42,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:42,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:42,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:42,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:42,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:42,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:42,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:42,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:42,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:42,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:42,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:42,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:42,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:42,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:42,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:42,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:42,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:32:42,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:42,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:42,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:42,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:42,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:42,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:42,543 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:42,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:42,543 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:42,544 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:42,544 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:42,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:42,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:42,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:42,545 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:42,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:42,545 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:42,545 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:42,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:42,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:32:42,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:42,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:32:42,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:42,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:32:42,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:42,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:32:42,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:32:42,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:32:42,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:42,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:32:42,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:42,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:42,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:42,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:42,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:42,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:32:42,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:42,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:42,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:32:42,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:42,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:42,555 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_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 185af411ffb66b9762afca1cabf119211700e2cdb0b48054cece4906f7290e44 [2021-11-20 23:32:42,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:42,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:42,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:42,844 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:42,844 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:42,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c [2021-11-20 23:32:42,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/data/202780f69/34623b800f26425ca1f6feea1038c4e2/FLAGb7d6d7916 [2021-11-20 23:32:43,338 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:43,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c [2021-11-20 23:32:43,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/data/202780f69/34623b800f26425ca1f6feea1038c4e2/FLAGb7d6d7916 [2021-11-20 23:32:43,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/data/202780f69/34623b800f26425ca1f6feea1038c4e2 [2021-11-20 23:32:43,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:43,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:43,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:43,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:43,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:43,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:43" (1/1) ... [2021-11-20 23:32:43,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5626ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:43, skipping insertion in model container [2021-11-20 23:32:43,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:43" (1/1) ... [2021-11-20 23:32:43,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:43,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:43,937 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_0de5d885-1cab-4fdd-8805-1ecd234324b9/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2021-11-20 23:32:43,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:43,974 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:43,985 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_0de5d885-1cab-4fdd-8805-1ecd234324b9/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2021-11-20 23:32:44,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:44,039 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:44,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44 WrapperNode [2021-11-20 23:32:44,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:44,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:44,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:44,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:44,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,077 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2021-11-20 23:32:44,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:44,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:44,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:44,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:44,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:44,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:44,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:44,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:44,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (1/1) ... [2021-11-20 23:32:44,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:44,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:44,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:32:44,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:32:44,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:32:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:44,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:44,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:32:44,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:32:44,281 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:44,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:44,456 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:32:44,482 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:32:44,483 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:32:44,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:44 BoogieIcfgContainer [2021-11-20 23:32:44,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:32:44,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:32:44,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:32:44,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:32:44,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:43" (1/3) ... [2021-11-20 23:32:44,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d43450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:44, skipping insertion in model container [2021-11-20 23:32:44,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:44" (2/3) ... [2021-11-20 23:32:44,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d43450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:44, skipping insertion in model container [2021-11-20 23:32:44,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:44" (3/3) ... [2021-11-20 23:32:44,498 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound2.c [2021-11-20 23:32:44,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:32:44,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:32:44,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:32:44,550 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:32:44,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:32:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 23:32:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:32:44,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:44,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:44,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash 282219046, now seen corresponding path program 1 times [2021-11-20 23:32:44,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330317943] [2021-11-20 23:32:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:44,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:32:44,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330317943] [2021-11-20 23:32:44,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330317943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:44,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:44,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:32:44,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917798221] [2021-11-20 23:32:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:44,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:32:44,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:32:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:32:44,816 INFO L87 Difference]: Start difference. First operand has 27 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:32:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:44,866 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2021-11-20 23:32:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:32:44,868 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-20 23:32:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:44,875 INFO L225 Difference]: With dead ends: 46 [2021-11-20 23:32:44,876 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 23:32:44,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:32:44,884 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:44,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:32:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 23:32:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 23:32:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 23:32:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2021-11-20 23:32:44,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2021-11-20 23:32:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:44,935 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2021-11-20 23:32:44,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:32:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2021-11-20 23:32:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:32:44,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:44,936 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:44,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:32:44,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1143065712, now seen corresponding path program 1 times [2021-11-20 23:32:44,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:44,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565765274] [2021-11-20 23:32:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:44,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:32:45,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565765274] [2021-11-20 23:32:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565765274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:45,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:45,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:32:45,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664241130] [2021-11-20 23:32:45,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:45,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:32:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:32:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:32:45,334 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:32:47,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:32:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:48,227 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2021-11-20 23:32:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:32:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-20 23:32:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:48,230 INFO L225 Difference]: With dead ends: 44 [2021-11-20 23:32:48,230 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 23:32:48,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:32:48,233 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:48,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:32:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 23:32:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2021-11-20 23:32:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 23:32:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-11-20 23:32:48,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 15 [2021-11-20 23:32:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:48,248 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-11-20 23:32:48,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:32:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-11-20 23:32:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 23:32:48,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:48,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:48,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:32:48,250 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -720172405, now seen corresponding path program 1 times [2021-11-20 23:32:48,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:48,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098677256] [2021-11-20 23:32:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:48,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:32:48,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098677256] [2021-11-20 23:32:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098677256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081218062] [2021-11-20 23:32:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:48,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:48,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:48,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:48,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:32:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:32:48,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:32:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:32:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:32:49,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081218062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:32:49,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984788474] [2021-11-20 23:32:49,246 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-20 23:32:49,246 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:32:49,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:32:49,255 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:32:49,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:32:51,890 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2021-11-20 23:32:51,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-20 23:32:52,073 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:32:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [984788474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:53,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:32:53,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 8, 8] total 24 [2021-11-20 23:32:53,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915472820] [2021-11-20 23:32:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:53,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:32:53,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:32:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:32:53,364 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:32:56,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:32:58,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:00,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:05,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:08,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:09,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:33:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:09,944 INFO L93 Difference]: Finished difference Result 67 states and 96 transitions. [2021-11-20 23:33:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:33:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 23:33:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:09,950 INFO L225 Difference]: With dead ends: 67 [2021-11-20 23:33:09,950 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 23:33:09,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:33:09,952 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:09,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2021-11-20 23:33:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 23:33:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-20 23:33:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:33:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2021-11-20 23:33:09,971 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2021-11-20 23:33:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:09,972 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2021-11-20 23:33:09,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:33:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2021-11-20 23:33:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 23:33:09,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:09,975 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:10,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:10,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:10,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -251004687, now seen corresponding path program 1 times [2021-11-20 23:33:10,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:10,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356497428] [2021-11-20 23:33:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:10,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:10,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:33:10,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587437310] [2021-11-20 23:33:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:10,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:10,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:10,220 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:10,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0de5d885-1cab-4fdd-8805-1ecd234324b9/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process