./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/cggmp2005b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/cggmp2005b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a85ef4e6caed20a9aa6e00fcf3a476ebe3f071202fc083a4545018fb19b4c9c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:17:35,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:17:35,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:17:35,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:17:35,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:17:35,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:17:35,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:17:35,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:17:35,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:17:35,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:17:35,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:17:35,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:17:35,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:17:35,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:17:35,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:17:35,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:17:35,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:17:35,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:17:35,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:17:35,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:17:35,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:17:35,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:17:35,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:17:35,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:17:35,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:17:35,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:17:35,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:17:35,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:17:35,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:17:35,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:17:35,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:17:35,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:17:35,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:17:35,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:17:35,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:17:35,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:17:35,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:17:35,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:17:35,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:17:35,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:17:35,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:17:35,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:17:35,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:17:35,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:17:35,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:17:35,676 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:17:35,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:17:35,677 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:17:35,677 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:17:35,677 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:17:35,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:17:35,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:17:35,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:17:35,685 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:17:35,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:17:35,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:17:35,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:17:35,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:17:35,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:17:35,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:17:35,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:17:35,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:17:35,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:17:35,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:17:35,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:17:35,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:17:35,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:17:35,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:17:35,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:17:35,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:17:35,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:17:35,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:17:35,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:17:35,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:17:35,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:17:35,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:17:35,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:17:35,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:17:35,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:17:35,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:17:35,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:17:35,693 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_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a85ef4e6caed20a9aa6e00fcf3a476ebe3f071202fc083a4545018fb19b4c9c [2021-10-24 11:17:35,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:17:35,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:17:35,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:17:35,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:17:35,990 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:17:35,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/loop-lit/cggmp2005b.i [2021-10-24 11:17:36,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/data/635640df6/88e56d7c2584457c9f6260b70dc499fa/FLAG409ef82b4 [2021-10-24 11:17:36,542 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:17:36,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/sv-benchmarks/c/loop-lit/cggmp2005b.i [2021-10-24 11:17:36,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/data/635640df6/88e56d7c2584457c9f6260b70dc499fa/FLAG409ef82b4 [2021-10-24 11:17:36,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/data/635640df6/88e56d7c2584457c9f6260b70dc499fa [2021-10-24 11:17:36,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:17:36,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:17:36,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:17:36,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:17:36,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:17:36,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:36" (1/1) ... [2021-10-24 11:17:36,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c957a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:36, skipping insertion in model container [2021-10-24 11:17:36,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:36" (1/1) ... [2021-10-24 11:17:36,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:17:36,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:17:37,179 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/sv-benchmarks/c/loop-lit/cggmp2005b.i[895,908] [2021-10-24 11:17:37,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:17:37,209 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:17:37,232 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/sv-benchmarks/c/loop-lit/cggmp2005b.i[895,908] [2021-10-24 11:17:37,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:17:37,258 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:17:37,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37 WrapperNode [2021-10-24 11:17:37,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:17:37,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:17:37,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:17:37,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:17:37,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:17:37,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:17:37,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:17:37,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:17:37,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:17:37,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:17:37,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:17:37,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:17:37,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (1/1) ... [2021-10-24 11:17:37,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:17:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:17:37,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:17:37,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:17:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:17:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:17:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:17:37,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:17:37,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:17:37,704 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-24 11:17:37,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:37 BoogieIcfgContainer [2021-10-24 11:17:37,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:17:37,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:17:37,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:17:37,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:17:37,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:17:36" (1/3) ... [2021-10-24 11:17:37,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c49fc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:37, skipping insertion in model container [2021-10-24 11:17:37,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:37" (2/3) ... [2021-10-24 11:17:37,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c49fc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:37, skipping insertion in model container [2021-10-24 11:17:37,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:37" (3/3) ... [2021-10-24 11:17:37,714 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2021-10-24 11:17:37,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:17:37,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 11:17:37,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:17:37,773 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 11:17:37,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 11:17:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) [2021-10-24 11:17:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 11:17:37,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:17:37,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 11:17:37,793 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:17:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:17:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2622986, now seen corresponding path program 1 times [2021-10-24 11:17:37,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:17:37,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375913485] [2021-10-24 11:17:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:17:37,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:17:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:17:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:17:37,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:17:37,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375913485] [2021-10-24 11:17:37,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375913485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:17:37,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:17:37,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:17:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380287960] [2021-10-24 11:17:37,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:17:37,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:17:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:17:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:17:37,988 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:17:38,009 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-10-24 11:17:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:17:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-24 11:17:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:17:38,018 INFO L225 Difference]: With dead ends: 15 [2021-10-24 11:17:38,018 INFO L226 Difference]: Without dead ends: 8 [2021-10-24 11:17:38,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:17:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-24 11:17:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-24 11:17:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-10-24 11:17:38,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2021-10-24 11:17:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:17:38,050 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-24 11:17:38,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-10-24 11:17:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 11:17:38,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:17:38,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:17:38,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:17:38,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:17:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:17:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash -611974003, now seen corresponding path program 1 times [2021-10-24 11:17:38,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:17:38,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378453416] [2021-10-24 11:17:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:17:38,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:17:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:17:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:17:38,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:17:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378453416] [2021-10-24 11:17:38,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378453416] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:17:38,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:17:38,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:17:38,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317009889] [2021-10-24 11:17:38,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:17:38,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:17:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:17:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:17:38,112 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:17:38,119 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2021-10-24 11:17:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:17:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-24 11:17:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:17:38,120 INFO L225 Difference]: With dead ends: 15 [2021-10-24 11:17:38,120 INFO L226 Difference]: Without dead ends: 9 [2021-10-24 11:17:38,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:17:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-24 11:17:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-24 11:17:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-10-24 11:17:38,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-10-24 11:17:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:17:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-24 11:17:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-10-24 11:17:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:17:38,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:17:38,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:17:38,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:17:38,127 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:17:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:17:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1360222467, now seen corresponding path program 1 times [2021-10-24 11:17:38,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:17:38,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291735607] [2021-10-24 11:17:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:17:38,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:17:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:17:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:17:38,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:17:38,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291735607] [2021-10-24 11:17:38,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291735607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:17:38,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50294571] [2021-10-24 11:17:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:17:38,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:17:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:17:38,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:17:38,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:17:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:17:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:17:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:17:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:17:38,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:17:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:17:38,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50294571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:17:38,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [225838317] [2021-10-24 11:17:38,493 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-24 11:17:38,493 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:17:38,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:17:38,513 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:17:38,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:17:38,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:17:38,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 11:17:38,555 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:17:38,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 11:17:38,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-10-24 11:17:38,584 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-10-24 11:17:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:17:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-24 11:17:38,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 11:17:38,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-24 11:17:38,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 11:17:38,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:17:38,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:17:38,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:17:38,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:17:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-24 11:17:38,685 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:17:38,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 11:17:38,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 11:17:38,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-24 11:17:38,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 11:17:38,713 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:95, output treesize:80 [2021-10-24 11:17:38,721 INFO L180 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-10-24 11:17:38,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-10-24 11:17:38,731 INFO L180 QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size [2021-10-24 11:17:38,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-24 11:17:38,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:38,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 229 [2021-10-24 11:17:38,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:38,986 INFO L180 QuantifierPusher]: treesize reduction 30, result has 60.0 percent of original size [2021-10-24 11:17:38,989 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 11:17:38,995 INFO L180 QuantifierPusher]: treesize reduction 36, result has 51.4 percent of original size [2021-10-24 11:17:38,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 11:17:39,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,045 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-10-24 11:17:39,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 158 [2021-10-24 11:17:39,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:39,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-24 11:17:39,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,130 INFO L180 QuantifierPusher]: treesize reduction 24, result has 66.7 percent of original size [2021-10-24 11:17:39,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-24 11:17:39,138 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.7 percent of original size [2021-10-24 11:17:39,141 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 11:17:39,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:39,199 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-10-24 11:17:39,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-24 11:17:39,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:39,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-24 11:17:39,217 INFO L180 QuantifierPusher]: treesize reduction 6, result has 87.2 percent of original size [2021-10-24 11:17:39,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 11:17:39,235 INFO L180 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-10-24 11:17:39,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-24 11:17:39,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:17:39,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-24 11:17:39,250 INFO L180 QuantifierPusher]: treesize reduction 6, result has 87.2 percent of original size [2021-10-24 11:17:39,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 11:17:39,261 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 11:17:39,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 11:17:39,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 11:17:39,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-24 11:17:39,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888592662] [2021-10-24 11:17:39,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:17:39,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:17:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:17:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:17:39,584 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:17:39,626 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2021-10-24 11:17:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:17:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 8 [2021-10-24 11:17:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:17:39,630 INFO L225 Difference]: With dead ends: 21 [2021-10-24 11:17:39,630 INFO L226 Difference]: Without dead ends: 18 [2021-10-24 11:17:39,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-24 11:17:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-24 11:17:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-24 11:17:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-24 11:17:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-10-24 11:17:39,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 8 [2021-10-24 11:17:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:17:39,648 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-10-24 11:17:39,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-10-24 11:17:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-24 11:17:39,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:17:39,650 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2021-10-24 11:17:39,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:17:39,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:17:39,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:17:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:17:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash 638752916, now seen corresponding path program 2 times [2021-10-24 11:17:39,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:17:39,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846495514] [2021-10-24 11:17:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:17:39,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:17:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:17:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-24 11:17:39,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:17:39,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846495514] [2021-10-24 11:17:39,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846495514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:17:39,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209431597] [2021-10-24 11:17:39,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 11:17:39,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:17:39,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:17:39,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:17:39,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 11:17:40,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-24 11:17:40,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:17:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:17:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:17:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-24 11:17:40,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:17:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-24 11:17:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209431597] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:17:40,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:17:40,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2021-10-24 11:17:40,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152404308] [2021-10-24 11:17:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:17:40,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:17:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:17:40,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:17:40,167 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-24 11:17:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:17:40,189 INFO L93 Difference]: Finished difference Result 30 states and 46 transitions. [2021-10-24 11:17:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:17:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 17 [2021-10-24 11:17:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:17:40,190 INFO L225 Difference]: With dead ends: 30 [2021-10-24 11:17:40,191 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 11:17:40,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:17:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 11:17:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 11:17:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 11:17:40,193 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-24 11:17:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:17:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 11:17:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-24 11:17:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 11:17:40,194 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 11:17:40,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:17:40,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:17:40,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-24 11:17:40,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 11:17:40,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:40,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:40,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:40,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 11:17:40,458 INFO L853 garLoopResultBuilder]: At program point L35-2(lines 35 37) the Hoare annotation is: (= ULTIMATE.start_main_~k~0 4) [2021-10-24 11:17:40,459 INFO L853 garLoopResultBuilder]: At program point L35-3(lines 29 38) the Hoare annotation is: (or (= ULTIMATE.start_main_~k~0 4) (and (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~j~0 100) 0))) [2021-10-24 11:17:40,459 INFO L853 garLoopResultBuilder]: At program point L31-2(lines 31 33) the Hoare annotation is: (or (<= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~k~0 4)) [2021-10-24 11:17:40,459 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-24 11:17:40,459 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 11:17:40,459 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-24 11:17:40,460 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 11:17:40,460 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-24 11:17:40,460 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-24 11:17:40,466 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:17:40,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:17:40 BoogieIcfgContainer [2021-10-24 11:17:40,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:17:40,483 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:17:40,483 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:17:40,483 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:17:40,484 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:37" (3/4) ... [2021-10-24 11:17:40,487 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 11:17:40,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-24 11:17:40,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-24 11:17:40,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-24 11:17:40,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 11:17:40,546 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:17:40,546 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:17:40,547 INFO L168 Benchmark]: Toolchain (without parser) took 3600.35 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 74.3 MB in the beginning and 64.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 33.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,547 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 52.8 MB in the beginning and 52.8 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:17:40,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.08 ms. Allocated memory is still 109.1 MB. Free memory was 74.1 MB in the beginning and 85.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,548 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.41 ms. Allocated memory is still 109.1 MB. Free memory was 85.6 MB in the beginning and 84.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,549 INFO L168 Benchmark]: Boogie Preprocessor took 48.59 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 83.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,550 INFO L168 Benchmark]: RCFGBuilder took 350.84 ms. Allocated memory is still 109.1 MB. Free memory was 83.0 MB in the beginning and 73.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,550 INFO L168 Benchmark]: TraceAbstraction took 2774.29 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 72.5 MB in the beginning and 66.3 MB in the end (delta: 6.2 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,551 INFO L168 Benchmark]: Witness Printer took 63.19 ms. Allocated memory is still 132.1 MB. Free memory was 66.3 MB in the beginning and 64.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:17:40,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 52.8 MB in the beginning and 52.8 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.08 ms. Allocated memory is still 109.1 MB. Free memory was 74.1 MB in the beginning and 85.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.41 ms. Allocated memory is still 109.1 MB. Free memory was 85.6 MB in the beginning and 84.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.59 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 83.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 350.84 ms. Allocated memory is still 109.1 MB. Free memory was 83.0 MB in the beginning and 73.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2774.29 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 72.5 MB in the beginning and 66.3 MB in the end (delta: 6.2 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. * Witness Printer took 63.19 ms. Allocated memory is still 132.1 MB. Free memory was 66.3 MB in the beginning and 64.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2701.4ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 12.1ms, AutomataDifference: 135.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 30.5ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 13 SDslu, 41 SDs, 0 SdLazy, 25 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 385.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 19 NumberOfFragments, 24 HoareAnnotationTreeSize, 4 FomulaSimplifications, 66 FormulaSimplificationTreeSizeReduction, 11.8ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 12.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 37.6ms SsaConstructionTime, 93.4ms SatisfiabilityAnalysisTime, 502.6ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 146 SizeOfPredicates, 2 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 80/85 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: i <= 1 || k == 4 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: k == 4 || (i == 0 && j + 100 <= 0) RESULT: Ultimate proved your program to be correct! [2021-10-24 11:17:40,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0563c906-8fa4-4d03-b034-6f4a67cc34c5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...