./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan --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 1e5fcac2800fa481c87e1ba666bedec539f533fb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan --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 1e5fcac2800fa481c87e1ba666bedec539f533fb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:45:51,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:45:51,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:45:51,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:45:51,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:45:51,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:45:51,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:45:51,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:45:51,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:45:51,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:45:51,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:45:51,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:45:51,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:45:51,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:45:51,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:45:51,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:45:51,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:45:51,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:45:51,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:45:51,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:45:51,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:45:51,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:45:51,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:45:51,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:45:51,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:45:51,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:45:51,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:45:51,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:45:51,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:45:51,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:45:51,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:45:51,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:45:51,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:45:51,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:45:51,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:45:51,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:45:51,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:45:51,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:45:51,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:45:51,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:45:51,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:45:51,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:45:51,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:45:51,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:45:51,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:45:51,460 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:45:51,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:45:51,461 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:45:51,462 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:45:51,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:45:51,462 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:45:51,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:45:51,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:45:51,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:45:51,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:45:51,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:45:51,464 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:45:51,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:45:51,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:45:51,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:45:51,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:45:51,465 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-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e5fcac2800fa481c87e1ba666bedec539f533fb [2020-12-09 04:45:51,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:45:51,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:45:51,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:45:51,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:45:51,667 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:45:51,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2020-12-09 04:45:51,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/550f44d5c/d56ac8bdb9164c33a67750c6247c4aa0/FLAG88b34e24a [2020-12-09 04:45:52,064 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:45:52,064 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2020-12-09 04:45:52,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/550f44d5c/d56ac8bdb9164c33a67750c6247c4aa0/FLAG88b34e24a [2020-12-09 04:45:52,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/550f44d5c/d56ac8bdb9164c33a67750c6247c4aa0 [2020-12-09 04:45:52,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:45:52,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:45:52,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:45:52,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:45:52,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:45:52,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4a28d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52, skipping insertion in model container [2020-12-09 04:45:52,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:45:52,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:45:52,204 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c[520,533] [2020-12-09 04:45:52,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:45:52,224 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:45:52,232 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c[520,533] [2020-12-09 04:45:52,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:45:52,253 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:45:52,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52 WrapperNode [2020-12-09 04:45:52,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:45:52,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:45:52,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:45:52,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:45:52,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:45:52,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:45:52,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:45:52,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:45:52,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... [2020-12-09 04:45:52,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:45:52,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:45:52,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:45:52,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:45:52,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:45:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:45:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:45:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:45:52,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:45:52,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:45:52,567 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-09 04:45:52,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:52 BoogieIcfgContainer [2020-12-09 04:45:52,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:45:52,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:45:52,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:45:52,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:45:52,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:45:52" (1/3) ... [2020-12-09 04:45:52,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2455fb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:45:52, skipping insertion in model container [2020-12-09 04:45:52,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:45:52" (2/3) ... [2020-12-09 04:45:52,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2455fb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:45:52, skipping insertion in model container [2020-12-09 04:45:52,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:52" (3/3) ... [2020-12-09 04:45:52,574 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound1.c [2020-12-09 04:45:52,584 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:45:52,587 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 04:45:52,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 04:45:52,611 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:45:52,611 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:45:52,611 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:45:52,612 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:45:52,612 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:45:52,612 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:45:52,612 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:45:52,612 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:45:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-09 04:45:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 04:45:52,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:45:52,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 04:45:52,626 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:45:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:45:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 3980175, now seen corresponding path program 1 times [2020-12-09 04:45:52,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:45:52,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591492147] [2020-12-09 04:45:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:45:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:45:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:45:52,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591492147] [2020-12-09 04:45:52,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:45:52,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 04:45:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411999675] [2020-12-09 04:45:52,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:45:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:45:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:45:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:45:52,797 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-12-09 04:45:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:45:52,880 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-12-09 04:45:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:45:52,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 04:45:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:45:52,890 INFO L225 Difference]: With dead ends: 78 [2020-12-09 04:45:52,890 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 04:45:52,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:45:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 04:45:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-12-09 04:45:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 04:45:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-12-09 04:45:52,928 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 4 [2020-12-09 04:45:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:45:52,929 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-12-09 04:45:52,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:45:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-12-09 04:45:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:45:52,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:45:52,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 04:45:52,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:45:52,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:45:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:45:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash -469863374, now seen corresponding path program 1 times [2020-12-09 04:45:52,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:45:52,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400459486] [2020-12-09 04:45:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:45:52,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:45:52,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801176339] [2020-12-09 04:45:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:45:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:45:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 04:45:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:45:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:45:53,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:45:53,109 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 04:45:53,110 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:45:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:45:53,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400459486] [2020-12-09 04:45:53,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:45:53,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801176339] [2020-12-09 04:45:53,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:45:53,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-12-09 04:45:53,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080062117] [2020-12-09 04:45:53,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 04:45:53,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:45:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 04:45:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-09 04:45:53,133 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-12-09 04:45:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:45:53,265 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-09 04:45:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:45:53,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2020-12-09 04:45:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:45:53,266 INFO L225 Difference]: With dead ends: 47 [2020-12-09 04:45:53,266 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 04:45:53,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2020-12-09 04:45:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 04:45:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-09 04:45:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 04:45:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-09 04:45:53,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 6 [2020-12-09 04:45:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:45:53,275 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-09 04:45:53,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 04:45:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-09 04:45:53,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:45:53,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:45:53,275 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:45:53,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 04:45:53,478 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:45:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:45:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1203127770, now seen corresponding path program 1 times [2020-12-09 04:45:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:45:53,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618086262] [2020-12-09 04:45:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:45:53,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:45:53,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174073317] [2020-12-09 04:45:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:45:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:45:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:45:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:45:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:45:53,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:45:53,726 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:45:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:45:53,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618086262] [2020-12-09 04:45:53,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:45:53,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174073317] [2020-12-09 04:45:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392663432] [2020-12-09 04:45:53,768 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 04:45:53,768 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:45:53,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:45:53,775 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:45:53,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:45:53,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:45:53,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:45:54,312 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:45:54,432 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-12-09 04:45:54,662 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-09 04:45:54,794 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 04:45:54,977 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-09 04:45:55,104 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-09 04:45:55,104 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:45:55,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:45:55,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-09 04:45:55,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132302643] [2020-12-09 04:45:55,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:45:55,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:45:55,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:45:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:45:55,106 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 6 states. [2020-12-09 04:45:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:45:55,173 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-09 04:45:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 04:45:55,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 04:45:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:45:55,175 INFO L225 Difference]: With dead ends: 46 [2020-12-09 04:45:55,175 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 04:45:55,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-09 04:45:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 04:45:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2020-12-09 04:45:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 04:45:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-09 04:45:55,180 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 11 [2020-12-09 04:45:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:45:55,180 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-09 04:45:55,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:45:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-09 04:45:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 04:45:55,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:45:55,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 04:45:55,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:45:55,382 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:45:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:45:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1576664640, now seen corresponding path program 1 times [2020-12-09 04:45:55,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:45:55,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998426045] [2020-12-09 04:45:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:45:55,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:45:55,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796458217] [2020-12-09 04:45:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:45:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:45:55,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 04:45:55,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:45:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:45:55,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:46:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:46:07,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998426045] [2020-12-09 04:46:07,908 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:46:07,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796458217] [2020-12-09 04:46:07,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036399268] [2020-12-09 04:46:07,911 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 04:46:07,911 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:46:07,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:46:07,911 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:46:07,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:46:07,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:46:07,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:46:08,264 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:46:08,735 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2020-12-09 04:46:09,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:46:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:46:09,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-09 04:46:09,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535945579] [2020-12-09 04:46:09,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 04:46:09,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:46:09,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 04:46:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=235, Unknown=3, NotChecked=0, Total=306 [2020-12-09 04:46:09,298 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 12 states. [2020-12-09 04:46:15,395 WARN L197 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 04:46:21,490 WARN L197 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 04:46:37,932 WARN L197 SmtUtils]: Spent 16.42 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-09 04:48:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:48:27,734 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-09 04:48:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 04:48:27,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-09 04:48:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:48:27,735 INFO L225 Difference]: With dead ends: 62 [2020-12-09 04:48:27,735 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 04:48:27,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 71.9s TimeCoverageRelationStatistics Valid=173, Invalid=517, Unknown=12, NotChecked=0, Total=702 [2020-12-09 04:48:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 04:48:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-12-09 04:48:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 04:48:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-09 04:48:27,741 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 15 [2020-12-09 04:48:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:48:27,741 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-09 04:48:27,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 04:48:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-09 04:48:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 04:48:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:48:27,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2020-12-09 04:48:27,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:48:27,943 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:48:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:48:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1309172917, now seen corresponding path program 2 times [2020-12-09 04:48:27,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:48:27,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519638018] [2020-12-09 04:48:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:48:27,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:48:27,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104377225] [2020-12-09 04:48:27,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:48:27,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 04:48:27,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:48:27,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 04:48:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:48:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-09 04:48:28,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:48:53,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519638018] [2020-12-09 04:48:53,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:48:53,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104377225] [2020-12-09 04:48:53,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-09 04:48:53,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124700904] [2020-12-09 04:48:53,432 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 04:48:53,432 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:48:53,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:48:53,432 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:48:53,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:48:53,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:48:53,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:48:53,675 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:48:54,050 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 04:48:54,433 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 04:48:54,667 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-09 04:48:54,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:48:54,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:48:54,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 04:48:54,669 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 04:48:54,669 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:48:54,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:48:54,881 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 04:48:54,881 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 04:48:54,891 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 04:48:54,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:48:54 BoogieIcfgContainer [2020-12-09 04:48:54,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:48:54,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:48:54,892 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:48:54,892 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:48:54,892 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:45:52" (3/4) ... [2020-12-09 04:48:54,895 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 04:48:54,895 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:48:54,896 INFO L168 Benchmark]: Toolchain (without parser) took 182813.76 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 67.7 MB in the beginning and 42.1 MB in the end (delta: 25.6 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:48:54,896 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 90.2 MB. Free memory is still 63.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:48:54,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.67 ms. Allocated memory is still 90.2 MB. Free memory was 67.5 MB in the beginning and 69.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:48:54,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.97 ms. Allocated memory is still 90.2 MB. Free memory was 69.9 MB in the beginning and 68.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:48:54,898 INFO L168 Benchmark]: Boogie Preprocessor took 21.00 ms. Allocated memory is still 90.2 MB. Free memory was 68.4 MB in the beginning and 67.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:48:54,898 INFO L168 Benchmark]: RCFGBuilder took 256.28 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 48.7 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 04:48:54,899 INFO L168 Benchmark]: TraceAbstraction took 182321.61 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 48.4 MB in the beginning and 42.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 64.7 MB. Max. memory is 16.1 GB. [2020-12-09 04:48:54,899 INFO L168 Benchmark]: Witness Printer took 3.27 ms. Allocated memory is still 146.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:48:54,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 90.2 MB. Free memory is still 63.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 171.67 ms. Allocated memory is still 90.2 MB. Free memory was 67.5 MB in the beginning and 69.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.97 ms. Allocated memory is still 90.2 MB. Free memory was 69.9 MB in the beginning and 68.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.00 ms. Allocated memory is still 90.2 MB. Free memory was 68.4 MB in the beginning and 67.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 256.28 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 48.7 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 182321.61 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 48.4 MB in the beginning and 42.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 64.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.27 ms. Allocated memory is still 146.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int n; [L22] long long a, s, t; [L23] n = __VERIFIER_nondet_int() [L9] COND TRUE !cond [L26] a = 0 [L27] s = 1 [L28] t = 1 [L30] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 182.2s, OverallIterations: 5, TraceHistogramMax: 5, AutomataDifference: 138.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 194 SDslu, 75 SDs, 0 SdLazy, 214 SolverSat, 177 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 79.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 72.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 35 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 12.7s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 6739 SizeOfPredicates, 15 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 1/16 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:48:56,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:48:56,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:48:56,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:48:56,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:48:56,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:48:56,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:48:56,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:48:56,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:48:56,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:48:56,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:48:56,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:48:56,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:48:56,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:48:56,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:48:56,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:48:56,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:48:56,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:48:56,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:48:56,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:48:56,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:48:56,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:48:56,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:48:56,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:48:56,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:48:56,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:48:56,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:48:56,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:48:56,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:48:56,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:48:56,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:48:56,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:48:56,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:48:56,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:48:56,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:48:56,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:48:56,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:48:56,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:48:56,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:48:56,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:48:56,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:48:56,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 04:48:56,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:48:56,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:48:56,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:48:56,456 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:48:56,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:48:56,456 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:48:56,456 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:48:56,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:48:56,456 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:48:56,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:48:56,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:48:56,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:48:56,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:48:56,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:48:56,458 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:48:56,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:48:56,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:48:56,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 04:48:56,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:48:56,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:48:56,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:48:56,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:48:56,460 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e5fcac2800fa481c87e1ba666bedec539f533fb [2020-12-09 04:48:56,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:48:56,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:48:56,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:48:56,690 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:48:56,691 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:48:56,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2020-12-09 04:48:56,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/f78aeb644/90cbbb27b11b4fd38cb9e968cb444d65/FLAG81c30ca79 [2020-12-09 04:48:57,104 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:48:57,105 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2020-12-09 04:48:57,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/f78aeb644/90cbbb27b11b4fd38cb9e968cb444d65/FLAG81c30ca79 [2020-12-09 04:48:57,120 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/data/f78aeb644/90cbbb27b11b4fd38cb9e968cb444d65 [2020-12-09 04:48:57,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:48:57,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:48:57,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:48:57,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:48:57,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:48:57,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d1a3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57, skipping insertion in model container [2020-12-09 04:48:57,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:48:57,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:48:57,256 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c[520,533] [2020-12-09 04:48:57,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:48:57,278 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:48:57,294 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound1.c[520,533] [2020-12-09 04:48:57,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:48:57,319 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:48:57,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57 WrapperNode [2020-12-09 04:48:57,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:48:57,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:48:57,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:48:57,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:48:57,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:48:57,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:48:57,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:48:57,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:48:57,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... [2020-12-09 04:48:57,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:48:57,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:48:57,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:48:57,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:48:57,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:48:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 04:48:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:48:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:48:57,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:48:57,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:48:57,990 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-09 04:48:57,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:48:57 BoogieIcfgContainer [2020-12-09 04:48:57,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:48:57,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:48:57,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:48:57,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:48:57,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:48:57" (1/3) ... [2020-12-09 04:48:57,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683769a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:48:57, skipping insertion in model container [2020-12-09 04:48:57,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:48:57" (2/3) ... [2020-12-09 04:48:57,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683769a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:48:57, skipping insertion in model container [2020-12-09 04:48:57,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:48:57" (3/3) ... [2020-12-09 04:48:57,996 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound1.c [2020-12-09 04:48:58,007 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:48:58,009 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 04:48:58,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 04:48:58,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:48:58,035 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:48:58,035 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:48:58,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:48:58,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:48:58,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:48:58,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:48:58,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:48:58,046 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 04:48:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:48:58,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:48:58,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:48:58,050 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:48:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:48:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-09 04:48:58,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:48:58,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500584549] [2020-12-09 04:48:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 04:48:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:48:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 04:48:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:48:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:48:58,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:48:58,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500584549] [2020-12-09 04:48:58,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:48:58,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:48:58,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803870715] [2020-12-09 04:48:58,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 04:48:58,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:48:58,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 04:48:58,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:48:58,145 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 04:48:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:48:58,159 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-12-09 04:48:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:48:58,160 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-09 04:48:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:48:58,167 INFO L225 Difference]: With dead ends: 63 [2020-12-09 04:48:58,167 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 04:48:58,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:48:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 04:48:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 04:48:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 04:48:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-09 04:48:58,196 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 7 [2020-12-09 04:48:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:48:58,196 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-09 04:48:58,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 04:48:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-09 04:48:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:48:58,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:48:58,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:48:58,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 04:48:58,398 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:48:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:48:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-09 04:48:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:48:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721742952] [2020-12-09 04:48:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 04:48:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:48:58,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:48:58,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:48:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:48:58,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:48:58,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721742952] [2020-12-09 04:48:58,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:48:58,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:48:58,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051377865] [2020-12-09 04:48:58,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:48:58,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:48:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:48:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:48:58,500 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 4 states. [2020-12-09 04:48:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:48:58,941 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-09 04:48:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:48:58,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 04:48:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:48:58,948 INFO L225 Difference]: With dead ends: 54 [2020-12-09 04:48:58,948 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 04:48:58,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:48:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 04:48:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-12-09 04:48:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 04:48:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-09 04:48:58,954 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 7 [2020-12-09 04:48:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:48:58,955 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-09 04:48:58,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:48:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-09 04:48:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 04:48:58,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:48:58,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:48:59,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 04:48:59,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:48:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:48:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2020-12-09 04:48:59,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:48:59,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382406443] [2020-12-09 04:48:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 04:48:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:48:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:48:59,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:48:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:48:59,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:48:59,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382406443] [2020-12-09 04:48:59,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:48:59,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:48:59,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141835132] [2020-12-09 04:48:59,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:48:59,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:48:59,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:48:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:48:59,270 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 4 states. [2020-12-09 04:48:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:48:59,667 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-09 04:48:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 04:48:59,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 04:48:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:48:59,674 INFO L225 Difference]: With dead ends: 50 [2020-12-09 04:48:59,674 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 04:48:59,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:48:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 04:48:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-12-09 04:48:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 04:48:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-09 04:48:59,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 9 [2020-12-09 04:48:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:48:59,679 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-09 04:48:59,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:48:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-09 04:48:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:48:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:48:59,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:48:59,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 04:48:59,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:48:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:48:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1958320619, now seen corresponding path program 1 times [2020-12-09 04:48:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:48:59,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694882523] [2020-12-09 04:48:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 04:48:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:48:59,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:48:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:00,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 04:49:00,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694882523] [2020-12-09 04:49:00,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:49:00,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 04:49:00,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432832361] [2020-12-09 04:49:00,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 04:49:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:49:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 04:49:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 04:49:00,020 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-12-09 04:49:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:49:00,551 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-09 04:49:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:49:00,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 04:49:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:49:00,552 INFO L225 Difference]: With dead ends: 47 [2020-12-09 04:49:00,552 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 04:49:00,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 04:49:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 04:49:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-09 04:49:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 04:49:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-09 04:49:00,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 11 [2020-12-09 04:49:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:49:00,557 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-09 04:49:00,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 04:49:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-09 04:49:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 04:49:00,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:49:00,558 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:49:00,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 04:49:00,760 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:49:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:49:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1783845574, now seen corresponding path program 1 times [2020-12-09 04:49:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:49:00,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365270930] [2020-12-09 04:49:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 04:49:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:49:00,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:49:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:00,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:49:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:49:01,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365270930] [2020-12-09 04:49:01,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1014351018] [2020-12-09 04:49:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:49:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:49:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:49:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:01,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:49:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:49:01,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018419508] [2020-12-09 04:49:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:49:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:49:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 04:49:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:01,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:49:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 04:49:01,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:49:01,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 6, 4] total 8 [2020-12-09 04:49:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517759032] [2020-12-09 04:49:01,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:49:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:49:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:49:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:49:01,483 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 8 states. [2020-12-09 04:49:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:49:02,173 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-09 04:49:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 04:49:02,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-09 04:49:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:49:02,180 INFO L225 Difference]: With dead ends: 57 [2020-12-09 04:49:02,180 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 04:49:02,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-09 04:49:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 04:49:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2020-12-09 04:49:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 04:49:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-09 04:49:02,185 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 14 [2020-12-09 04:49:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:49:02,185 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-09 04:49:02,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:49:02,185 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-09 04:49:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 04:49:02,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:49:02,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:49:02,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:49:02,788 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:49:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:49:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash -583489763, now seen corresponding path program 1 times [2020-12-09 04:49:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:49:02,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528243572] [2020-12-09 04:49:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 04:49:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:49:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 04:49:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:03,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:49:03,781 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-09 04:49:04,411 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 04:49:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528243572] [2020-12-09 04:49:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1029919804] [2020-12-09 04:49:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:49:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:49:04,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 04:49:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:04,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:49:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:04,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284108241] [2020-12-09 04:49:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:49:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:49:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 04:49:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:49:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:05,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:49:06,163 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-09 04:49:06,170 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 04:49:06,170 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 04:49:09,111 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 04:49:16,066 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 04:49:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:49:16,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:49:16,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 8, 7] total 14 [2020-12-09 04:49:16,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920871435] [2020-12-09 04:49:16,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 04:49:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:49:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 04:49:16,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=127, Unknown=4, NotChecked=0, Total=182 [2020-12-09 04:49:16,101 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 14 states. [2020-12-09 04:49:27,753 WARN L197 SmtUtils]: Spent 9.74 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-09 04:49:40,224 WARN L197 SmtUtils]: Spent 8.96 s on a formula simplification that was a NOOP. DAG size: 35 [2020-12-09 04:49:50,784 WARN L197 SmtUtils]: Spent 9.46 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-09 04:50:05,134 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 04:50:14,504 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-09 04:50:22,295 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 04:50:51,121 WARN L197 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-09 04:51:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:51:03,667 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-12-09 04:51:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 04:51:03,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-09 04:51:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:51:03,675 INFO L225 Difference]: With dead ends: 73 [2020-12-09 04:51:03,675 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 04:51:03,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=182, Invalid=411, Unknown=7, NotChecked=0, Total=600 [2020-12-09 04:51:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 04:51:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-12-09 04:51:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 04:51:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-09 04:51:03,684 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 16 [2020-12-09 04:51:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:51:03,684 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-09 04:51:03,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 04:51:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-09 04:51:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 04:51:03,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:51:03,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 04:51:04,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:51:04,289 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:51:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:51:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1115495499, now seen corresponding path program 1 times [2020-12-09 04:51:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 04:51:04,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704283276] [2020-12-09 04:51:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 04:51:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:51:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:51:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:51:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:51:04,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:51:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:51:04,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704283276] [2020-12-09 04:51:04,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295022283] [2020-12-09 04:51:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt [2020-12-09 04:51:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:51:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 04:51:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:51:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:51:05,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:51:06,827 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-09 04:51:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 04:51:09,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99429839] [2020-12-09 04:51:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:51:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:51:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 04:51:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:51:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:51:09,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:51:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:51:09,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 04:51:09,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 4, 6, 6] total 16 [2020-12-09 04:51:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520889485] [2020-12-09 04:51:09,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 04:51:09,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 04:51:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 04:51:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-09 04:51:09,800 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 16 states. [2020-12-09 04:51:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:51:10,891 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-09 04:51:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 04:51:10,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-12-09 04:51:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:51:10,892 INFO L225 Difference]: With dead ends: 48 [2020-12-09 04:51:10,892 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 04:51:10,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-12-09 04:51:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 04:51:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 04:51:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 04:51:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 04:51:10,893 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-12-09 04:51:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:51:10,894 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 04:51:10,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 04:51:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 04:51:10,894 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 04:51:11,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt,12 mathsat -unsat_core_generation=3 [2020-12-09 04:51:11,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 04:51:11,750 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-12-09 04:51:11,977 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-12-09 04:51:12,124 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-12-09 04:51:12,359 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L265 CegarLoopResult]: At program point L48(lines 20 49) the Hoare annotation is: true [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 04:51:12,361 INFO L262 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2020-12-09 04:51:12,362 INFO L258 CegarLoopResult]: At program point L12-2(lines 11 17) the Hoare annotation is: (let ((.cse2 (bvsge ULTIMATE.start_main_~n~0 (_ bv0 32))) (.cse3 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse4 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse5 (bvsle ULTIMATE.start_main_~n~0 (_ bv1 32))) (.cse0 ((_ sign_extend 32) (_ bv0 32))) (.cse1 ((_ sign_extend 32) (_ bv1 32)))) (or (let ((.cse6 ((_ sign_extend 32) (_ bv2 32)))) (and (= .cse0 (bvadd (bvmul .cse1 (_ bv18446744073709551615 64)) ULTIMATE.start_main_~a~0)) .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~t~0 (bvadd .cse1 .cse6)) (= (bvadd ULTIMATE.start_main_~s~0 (bvmul .cse6 (_ bv18446744073709551615 64))) (bvmul .cse1 (_ bv2 64))))) (and .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~s~0 .cse1) (= .cse0 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~t~0 .cse1)))) [2020-12-09 04:51:12,362 INFO L262 CegarLoopResult]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2020-12-09 04:51:12,362 INFO L262 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-12-09 04:51:12,362 INFO L258 CegarLoopResult]: At program point L12-5(lines 11 17) the Hoare annotation is: (let ((.cse5 ((_ sign_extend 32) (_ bv0 32))) (.cse0 (bvsge ULTIMATE.start_main_~n~0 (_ bv0 32))) (.cse1 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse2 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse3 (bvsle ULTIMATE.start_main_~n~0 (_ bv1 32))) (.cse4 ((_ sign_extend 32) (_ bv1 32)))) (or (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~s~0 .cse4) (= .cse5 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~t~0 .cse4)) (let ((.cse6 ((_ sign_extend 32) (_ bv2 32)))) (and (= .cse5 (bvadd (bvmul .cse4 (_ bv18446744073709551615 64)) ULTIMATE.start_main_~a~0)) (= (bvadd .cse4 (bvmul ULTIMATE.start_main_~a~0 .cse6)) ULTIMATE.start_main_~t~0) .cse0 .cse1 .cse2 .cse3 (= (bvadd ULTIMATE.start_main_~s~0 (bvmul .cse6 (_ bv18446744073709551615 64))) (bvmul .cse4 (_ bv2 64))))))) [2020-12-09 04:51:12,362 INFO L262 CegarLoopResult]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2020-12-09 04:51:12,362 INFO L258 CegarLoopResult]: At program point L12-8(lines 36 37) the Hoare annotation is: (let ((.cse5 ((_ sign_extend 32) (_ bv0 32))) (.cse0 (bvsge ULTIMATE.start_main_~n~0 (_ bv0 32))) (.cse1 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse2 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse3 (bvsle ULTIMATE.start_main_~n~0 (_ bv1 32))) (.cse4 ((_ sign_extend 32) (_ bv1 32)))) (or (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~s~0 .cse4) (= .cse5 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~t~0 .cse4)) (let ((.cse6 ((_ sign_extend 32) (_ bv2 32)))) (and (= .cse5 (bvadd (bvmul .cse4 (_ bv18446744073709551615 64)) ULTIMATE.start_main_~a~0)) (= (bvadd .cse4 (bvmul ULTIMATE.start_main_~a~0 .cse6)) ULTIMATE.start_main_~t~0) .cse0 .cse1 .cse2 .cse3 (= (bvadd ULTIMATE.start_main_~s~0 (bvmul .cse6 (_ bv18446744073709551615 64))) (bvmul .cse4 (_ bv2 64))))))) [2020-12-09 04:51:12,362 INFO L262 CegarLoopResult]: For program point L12-9(lines 12 15) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L258 CegarLoopResult]: At program point L12-11(lines 11 17) the Hoare annotation is: (let ((.cse1 ((_ sign_extend 32) (_ bv0 32))) (.cse0 ((_ sign_extend 32) (_ bv1 32)))) (or (and (= ULTIMATE.start_main_~s~0 .cse0) (= .cse1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~t~0 .cse0)) (let ((.cse2 ((_ sign_extend 32) (_ bv2 32)))) (and (= .cse1 (bvadd (bvmul .cse0 (_ bv18446744073709551615 64)) ULTIMATE.start_main_~a~0)) (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (= ULTIMATE.start_main_~t~0 (bvadd .cse0 .cse2)) (= (bvadd ULTIMATE.start_main_~s~0 (bvmul .cse2 (_ bv18446744073709551615 64))) (bvmul .cse0 (_ bv2 64))) (or (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond) (= (_ bv0 32) ULTIMATE.start_assume_abort_if_not_~cond)))))) [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L12-12(lines 12 15) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L258 CegarLoopResult]: At program point L12-14(lines 11 17) the Hoare annotation is: (let ((.cse0 ((_ sign_extend 32) (_ bv1 32)))) (or (and (= ULTIMATE.start_main_~s~0 .cse0) (= ULTIMATE.start_main_~t~0 .cse0)) (let ((.cse1 ((_ sign_extend 32) (_ bv2 32)))) (and (= ((_ sign_extend 32) (_ bv0 32)) (bvadd (bvmul .cse0 (_ bv18446744073709551615 64)) ULTIMATE.start_main_~a~0)) (= (bvadd .cse0 (bvmul ULTIMATE.start_main_~a~0 .cse1)) ULTIMATE.start_main_~t~0) (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (= (bvadd ULTIMATE.start_main_~s~0 (bvmul .cse1 (_ bv18446744073709551615 64))) (bvmul .cse0 (_ bv2 64))) (or (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond) (= (_ bv0 32) ULTIMATE.start_assume_abort_if_not_~cond)))))) [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L12-15(lines 12 15) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L265 CegarLoopResult]: At program point L12-17(lines 11 17) the Hoare annotation is: true [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L13(lines 13 14) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L13-3(lines 13 14) no Hoare annotation was computed. [2020-12-09 04:51:12,363 INFO L262 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-12-09 04:51:12,364 INFO L262 CegarLoopResult]: For program point L13-4(lines 13 14) no Hoare annotation was computed. [2020-12-09 04:51:12,364 INFO L262 CegarLoopResult]: For program point L13-5(lines 13 14) no Hoare annotation was computed. [2020-12-09 04:51:12,364 INFO L258 CegarLoopResult]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse4 ((_ sign_extend 32) (_ bv0 32))) (.cse0 (bvsge ULTIMATE.start_main_~n~0 (_ bv0 32))) (.cse1 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse2 (bvsle ULTIMATE.start_main_~n~0 (_ bv1 32))) (.cse3 ((_ sign_extend 32) (_ bv1 32)))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~s~0 .cse3) (= .cse4 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~t~0 .cse3)) (let ((.cse5 ((_ sign_extend 32) (_ bv2 32)))) (and (= .cse4 (bvadd (bvmul .cse3 (_ bv18446744073709551615 64)) ULTIMATE.start_main_~a~0)) (= (bvadd .cse3 (bvmul ULTIMATE.start_main_~a~0 .cse5)) ULTIMATE.start_main_~t~0) .cse0 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) .cse1 .cse2 (= (bvadd ULTIMATE.start_main_~s~0 (bvmul .cse5 (_ bv18446744073709551615 64))) (bvmul .cse3 (_ bv2 64))))))) [2020-12-09 04:51:12,364 INFO L262 CegarLoopResult]: For program point L30-3(lines 30 42) no Hoare annotation was computed. [2020-12-09 04:51:12,364 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 04:51:12,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:51:12 BoogieIcfgContainer [2020-12-09 04:51:12,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:51:12,379 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:51:12,379 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:51:12,379 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:51:12,379 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:48:57" (3/4) ... [2020-12-09 04:51:12,381 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 04:51:12,388 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 04:51:12,389 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 04:51:12,389 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 04:51:12,389 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 04:51:12,422 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_04e2ad0a-cdcb-47fb-8940-c3881829f25f/bin/utaipan/witness.graphml [2020-12-09 04:51:12,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:51:12,422 INFO L168 Benchmark]: Toolchain (without parser) took 135299.51 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 24.4 MB in the beginning and 66.7 MB in the end (delta: -42.3 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:12,423 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory is still 30.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:51:12,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.49 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 24.2 MB in the beginning and 54.5 MB in the end (delta: -30.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:12,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.94 ms. Allocated memory is still 71.3 MB. Free memory was 54.5 MB in the beginning and 52.8 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:51:12,424 INFO L168 Benchmark]: Boogie Preprocessor took 25.96 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 51.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:12,424 INFO L168 Benchmark]: RCFGBuilder took 606.37 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 52.1 MB in the end (delta: -652.9 kB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:12,424 INFO L168 Benchmark]: TraceAbstraction took 134386.45 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 51.3 MB in the beginning and 27.5 MB in the end (delta: 23.8 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:12,425 INFO L168 Benchmark]: Witness Printer took 43.23 ms. Allocated memory is still 86.0 MB. Free memory was 27.5 MB in the beginning and 66.7 MB in the end (delta: -39.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:51:12,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory is still 30.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 196.49 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 24.2 MB in the beginning and 54.5 MB in the end (delta: -30.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.94 ms. Allocated memory is still 71.3 MB. Free memory was 54.5 MB in the beginning and 52.8 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.96 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 51.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 606.37 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 52.1 MB in the end (delta: -652.9 kB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 134386.45 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 51.3 MB in the beginning and 27.5 MB in the end (delta: 23.8 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. * Witness Printer took 43.23 ms. Allocated memory is still 86.0 MB. Free memory was 27.5 MB in the beginning and 66.7 MB in the end (delta: -39.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(1bv32), 18446744073709551615bv64), a) && ~bvsge32(n, 0bv32)) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && t == ~bvadd16(~sign_extendFrom8To32(1bv32), ~sign_extendFrom8To32(2bv32))) && ~bvadd16(s, ~bvmul64(~sign_extendFrom8To32(2bv32), 18446744073709551615bv64)) == ~bvmul64(~sign_extendFrom8To32(1bv32), 2bv64)) || ((((((~bvsge32(n, 0bv32) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && s == ~sign_extendFrom8To32(1bv32)) && ~sign_extendFrom8To32(0bv32) == a) && t == ~sign_extendFrom8To32(1bv32)) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((s == ~sign_extendFrom8To32(1bv32) && ~sign_extendFrom8To32(0bv32) == a) && t == ~sign_extendFrom8To32(1bv32)) || ((((~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(1bv32), 18446744073709551615bv64), a) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && t == ~bvadd16(~sign_extendFrom8To32(1bv32), ~sign_extendFrom8To32(2bv32))) && ~bvadd16(s, ~bvmul64(~sign_extendFrom8To32(2bv32), 18446744073709551615bv64)) == ~bvmul64(~sign_extendFrom8To32(1bv32), 2bv64)) && (1bv32 == cond || 0bv32 == cond)) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((~bvsge32(n, 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && s == ~sign_extendFrom8To32(1bv32)) && ~sign_extendFrom8To32(0bv32) == a) && t == ~sign_extendFrom8To32(1bv32)) || ((((((~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(1bv32), 18446744073709551615bv64), a) && ~bvadd16(~sign_extendFrom8To32(1bv32), ~bvmul64(a, ~sign_extendFrom8To32(2bv32))) == t) && ~bvsge32(n, 0bv32)) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && ~bvadd16(s, ~bvmul64(~sign_extendFrom8To32(2bv32), 18446744073709551615bv64)) == ~bvmul64(~sign_extendFrom8To32(1bv32), 2bv64)) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((~bvsge32(n, 0bv32) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && s == ~sign_extendFrom8To32(1bv32)) && ~sign_extendFrom8To32(0bv32) == a) && t == ~sign_extendFrom8To32(1bv32)) || ((((((~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(1bv32), 18446744073709551615bv64), a) && ~bvadd16(~sign_extendFrom8To32(1bv32), ~bvmul64(a, ~sign_extendFrom8To32(2bv32))) == t) && ~bvsge32(n, 0bv32)) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && ~bvadd16(s, ~bvmul64(~sign_extendFrom8To32(2bv32), 18446744073709551615bv64)) == ~bvmul64(~sign_extendFrom8To32(1bv32), 2bv64)) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (s == ~sign_extendFrom8To32(1bv32) && t == ~sign_extendFrom8To32(1bv32)) || ((((~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(1bv32), 18446744073709551615bv64), a) && ~bvadd16(~sign_extendFrom8To32(1bv32), ~bvmul64(a, ~sign_extendFrom8To32(2bv32))) == t) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && ~bvadd16(s, ~bvmul64(~sign_extendFrom8To32(2bv32), 18446744073709551615bv64)) == ~bvmul64(~sign_extendFrom8To32(1bv32), 2bv64)) && (1bv32 == cond || 0bv32 == cond)) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((~bvsge32(n, 0bv32) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && s == ~sign_extendFrom8To32(1bv32)) && ~sign_extendFrom8To32(0bv32) == a) && t == ~sign_extendFrom8To32(1bv32)) || ((((((~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(1bv32), 18446744073709551615bv64), a) && ~bvadd16(~sign_extendFrom8To32(1bv32), ~bvmul64(a, ~sign_extendFrom8To32(2bv32))) == t) && ~bvsge32(n, 0bv32)) && ~bvadd16(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvsle64(n, 1bv32)) && ~bvadd16(s, ~bvmul64(~sign_extendFrom8To32(2bv32), 18446744073709551615bv64)) == ~bvmul64(~sign_extendFrom8To32(1bv32), 2bv64)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 133.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 110.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 287 SDslu, 188 SDs, 0 SdLazy, 345 SolverSat, 209 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 67.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 373 GetRequests, 288 SyntacticMatches, 17 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 59.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 51 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 22 NumberOfFragments, 389 HoareAnnotationTreeSize, 8 FomulaSimplifications, 222 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 230 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 18.0s InterpolantComputationTime, 199 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 342 ConstructedInterpolants, 0 QuantifiedInterpolants, 62733 SizeOfPredicates, 49 NumberOfNonLiveVariables, 608 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 68/150 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...