./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-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_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 9ec0e5925e997c01ed0feba8438589759f7e6730 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 12:11:34,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:11:34,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:11:34,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:11:34,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:11:34,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:11:34,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:11:34,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:11:34,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:11:34,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:11:34,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:11:34,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:11:34,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:11:34,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:11:34,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:11:34,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:11:34,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:11:34,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:11:34,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:11:34,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:11:34,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:11:34,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:11:34,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:11:34,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:11:34,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:11:34,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:11:34,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:11:34,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:11:34,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:11:34,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:11:34,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:11:34,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:11:34,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:11:34,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:11:34,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:11:34,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:11:34,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:11:34,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:11:34,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:11:34,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:11:34,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:11:34,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:11:34,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:11:34,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:11:34,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:11:34,367 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:11:34,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:11:34,367 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:11:34,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:11:34,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:11:34,369 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:11:34,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:11:34,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:11:34,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:11:34,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:11:34,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:11:34,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:11:34,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:11:34,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:11:34,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:11:34,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:11:34,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:11:34,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:11:34,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:11:34,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:11:34,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:11:34,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:11:34,372 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_ae79891f-1ba4-4531-ac95-93927760727f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ec0e5925e997c01ed0feba8438589759f7e6730 [2020-12-09 12:11:34,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:11:34,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:11:34,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:11:34,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:11:34,564 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:11:34,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2020-12-09 12:11:34,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/data/2d28526a5/31a43993a3fb442aad657932b48c37f1/FLAG8f5f7bde1 [2020-12-09 12:11:35,007 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:11:35,007 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c [2020-12-09 12:11:35,012 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/data/2d28526a5/31a43993a3fb442aad657932b48c37f1/FLAG8f5f7bde1 [2020-12-09 12:11:35,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/data/2d28526a5/31a43993a3fb442aad657932b48c37f1 [2020-12-09 12:11:35,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:11:35,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:11:35,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:11:35,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:11:35,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:11:35,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d532c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35, skipping insertion in model container [2020-12-09 12:11:35,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:11:35,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:11:35,510 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_ae79891f-1ba4-4531-ac95-93927760727f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2020-12-09 12:11:35,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:11:35,528 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:11:35,537 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_ae79891f-1ba4-4531-ac95-93927760727f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2020-12-09 12:11:35,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:11:35,552 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:11:35,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35 WrapperNode [2020-12-09 12:11:35,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:11:35,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:11:35,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:11:35,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:11:35,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:11:35,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:11:35,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:11:35,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:11:35,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... [2020-12-09 12:11:35,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:11:35,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:11:35,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:11:35,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:11:35,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 12:11:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:11:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:11:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:11:35,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:11:35,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:11:35,989 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-09 12:11:35,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:11:35 BoogieIcfgContainer [2020-12-09 12:11:35,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:11:35,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:11:35,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:11:35,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:11:35,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:11:35" (1/3) ... [2020-12-09 12:11:35,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cd71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:11:35, skipping insertion in model container [2020-12-09 12:11:35,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:11:35" (2/3) ... [2020-12-09 12:11:35,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cd71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:11:35, skipping insertion in model container [2020-12-09 12:11:35,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:11:35" (3/3) ... [2020-12-09 12:11:35,999 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2020-12-09 12:11:36,018 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:11:36,021 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 12:11:36,030 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 12:11:36,046 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:11:36,046 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:11:36,047 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:11:36,047 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:11:36,047 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:11:36,047 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:11:36,047 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:11:36,047 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:11:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-09 12:11:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 12:11:36,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:36,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 12:11:36,061 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash 180034058, now seen corresponding path program 1 times [2020-12-09 12:11:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:36,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171335967] [2020-12-09 12:11:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:36,177 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 12:11:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171335967] [2020-12-09 12:11:36,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:36,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:11:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414697577] [2020-12-09 12:11:36,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:11:36,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:11:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:11:36,192 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-09 12:11:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:36,204 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-12-09 12:11:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:11:36,205 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 12:11:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:36,210 INFO L225 Difference]: With dead ends: 59 [2020-12-09 12:11:36,211 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 12:11:36,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:11:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 12:11:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 12:11:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 12:11:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-09 12:11:36,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 5 [2020-12-09 12:11:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:36,235 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-09 12:11:36,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:11:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-09 12:11:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 12:11:36,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:36,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 12:11:36,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:11:36,236 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:36,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1181966144, now seen corresponding path program 1 times [2020-12-09 12:11:36,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:36,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027789568] [2020-12-09 12:11:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:36,251 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:36,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001554334] [2020-12-09 12:11:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 12:11:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:36,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 12:11:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:36,346 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 12:11:36,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:36,355 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 12:11:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027789568] [2020-12-09 12:11:36,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001554334] [2020-12-09 12:11:36,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:36,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-09 12:11:36,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970980028] [2020-12-09 12:11:36,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:11:36,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:11:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:11:36,360 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-12-09 12:11:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:36,390 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-12-09 12:11:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:11:36,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 12:11:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:36,392 INFO L225 Difference]: With dead ends: 55 [2020-12-09 12:11:36,392 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 12:11:36,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:11:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 12:11:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-12-09 12:11:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 12:11:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-09 12:11:36,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 6 [2020-12-09 12:11:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:36,399 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-09 12:11:36,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:11:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-09 12:11:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 12:11:36,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:36,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:36,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 12:11:36,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1984810813, now seen corresponding path program 1 times [2020-12-09 12:11:36,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:36,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782615474] [2020-12-09 12:11:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:36,667 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:36,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063485690] [2020-12-09 12:11:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 12:11:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:36,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 12:11:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:36,870 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 12:11:36,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:36,901 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 12:11:36,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782615474] [2020-12-09 12:11:36,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:36,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063485690] [2020-12-09 12:11:36,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:36,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 12:11:36,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451580148] [2020-12-09 12:11:36,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 12:11:36,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 12:11:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:11:36,903 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-12-09 12:11:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:37,001 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-09 12:11:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:11:37,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-09 12:11:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:37,002 INFO L225 Difference]: With dead ends: 62 [2020-12-09 12:11:37,002 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 12:11:37,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-09 12:11:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 12:11:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-12-09 12:11:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 12:11:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-09 12:11:37,008 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 8 [2020-12-09 12:11:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:37,008 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-09 12:11:37,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 12:11:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-09 12:11:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 12:11:37,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:37,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:37,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:37,210 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:37,212 INFO L82 PathProgramCache]: Analyzing trace with hash 437869184, now seen corresponding path program 1 times [2020-12-09 12:11:37,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:37,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332910407] [2020-12-09 12:11:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:37,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:37,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135486279] [2020-12-09 12:11:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 12:11:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 12:11:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:37,471 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 12:11:37,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:37,503 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 12:11:37,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332910407] [2020-12-09 12:11:37,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:37,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135486279] [2020-12-09 12:11:37,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:37,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2020-12-09 12:11:37,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629443419] [2020-12-09 12:11:37,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 12:11:37,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:37,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 12:11:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:11:37,505 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-12-09 12:11:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:37,612 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-09 12:11:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:11:37,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-09 12:11:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:37,614 INFO L225 Difference]: With dead ends: 60 [2020-12-09 12:11:37,614 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 12:11:37,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 12:11:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 12:11:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-12-09 12:11:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 12:11:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-09 12:11:37,619 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 10 [2020-12-09 12:11:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:37,619 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-09 12:11:37,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 12:11:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-09 12:11:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:11:37,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:37,620 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:37,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:37,822 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 482994473, now seen corresponding path program 1 times [2020-12-09 12:11:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:37,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303846203] [2020-12-09 12:11:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:37,864 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:37,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18889859] [2020-12-09 12:11:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 12:11:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:37,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 12:11:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:11:37,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:11:37,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303846203] [2020-12-09 12:11:37,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:37,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18889859] [2020-12-09 12:11:37,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:37,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 12:11:37,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539689173] [2020-12-09 12:11:37,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:11:37,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:11:37,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:11:37,990 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 6 states. [2020-12-09 12:11:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:38,045 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-09 12:11:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:11:38,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 12:11:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:38,046 INFO L225 Difference]: With dead ends: 90 [2020-12-09 12:11:38,046 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 12:11:38,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:11:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 12:11:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2020-12-09 12:11:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 12:11:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-12-09 12:11:38,051 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 11 [2020-12-09 12:11:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:38,051 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-12-09 12:11:38,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:11:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-12-09 12:11:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 12:11:38,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:38,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:38,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:38,254 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -114351517, now seen corresponding path program 1 times [2020-12-09 12:11:38,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:38,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771867374] [2020-12-09 12:11:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:38,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:38,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444109954] [2020-12-09 12:11:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 12:11:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:38,347 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 12:11:38,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:38,371 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 12:11:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771867374] [2020-12-09 12:11:38,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444109954] [2020-12-09 12:11:38,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:38,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 12:11:38,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151247063] [2020-12-09 12:11:38,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 12:11:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 12:11:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:11:38,373 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 7 states. [2020-12-09 12:11:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:38,510 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-09 12:11:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 12:11:38,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 12:11:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:38,512 INFO L225 Difference]: With dead ends: 83 [2020-12-09 12:11:38,512 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 12:11:38,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-09 12:11:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 12:11:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-12-09 12:11:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 12:11:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-12-09 12:11:38,519 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 12 [2020-12-09 12:11:38,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:38,519 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-12-09 12:11:38,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 12:11:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-12-09 12:11:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 12:11:38,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:38,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:38,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 12:11:38,721 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:38,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1777499878, now seen corresponding path program 1 times [2020-12-09 12:11:38,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:38,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173869520] [2020-12-09 12:11:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:38,757 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:38,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333999875] [2020-12-09 12:11:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 12:11:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:38,858 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 12:11:38,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:38,885 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 12:11:38,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173869520] [2020-12-09 12:11:38,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333999875] [2020-12-09 12:11:38,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:38,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2020-12-09 12:11:38,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51718738] [2020-12-09 12:11:38,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 12:11:38,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:38,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 12:11:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:11:38,891 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 8 states. [2020-12-09 12:11:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:41,087 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2020-12-09 12:11:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 12:11:41,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-09 12:11:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:41,089 INFO L225 Difference]: With dead ends: 131 [2020-12-09 12:11:41,089 INFO L226 Difference]: Without dead ends: 129 [2020-12-09 12:11:41,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-09 12:11:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-09 12:11:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 80. [2020-12-09 12:11:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 12:11:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-09 12:11:41,099 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 14 [2020-12-09 12:11:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:41,099 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-09 12:11:41,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 12:11:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-09 12:11:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 12:11:41,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:41,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:41,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:41,302 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:41,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1532792300, now seen corresponding path program 1 times [2020-12-09 12:11:41,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:41,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210597361] [2020-12-09 12:11:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:41,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:41,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110707018] [2020-12-09 12:11:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/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 12:11:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-09 12:11:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:41,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:11:41,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 12:11:41,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 12:11:41,651 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 12:11:41,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:41,905 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 12:11:41,906 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 12:11:42,133 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 12:11:42,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210597361] [2020-12-09 12:11:42,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:42,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110707018] [2020-12-09 12:11:42,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403730426] [2020-12-09 12:11:42,153 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-12-09 12:11:42,153 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:11:42,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:11:42,163 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:11:42,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:11:42,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:11:42,751 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 23 iterations. Over-approximation may be very coarse. [2020-12-09 12:11:42,858 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 12:11:42,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:11:42,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-12-09 12:11:42,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050516620] [2020-12-09 12:11:42,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 12:11:42,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 12:11:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-09 12:11:42,861 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 20 states. [2020-12-09 12:11:43,862 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-09 12:11:44,014 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-09 12:11:48,887 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-09 12:11:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:49,369 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-12-09 12:11:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-09 12:11:49,369 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-09 12:11:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:49,371 INFO L225 Difference]: With dead ends: 318 [2020-12-09 12:11:49,371 INFO L226 Difference]: Without dead ends: 239 [2020-12-09 12:11:49,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2020-12-09 12:11:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-09 12:11:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 150. [2020-12-09 12:11:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 12:11:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 187 transitions. [2020-12-09 12:11:49,391 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 187 transitions. Word has length 23 [2020-12-09 12:11:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:49,391 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 187 transitions. [2020-12-09 12:11:49,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 12:11:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 187 transitions. [2020-12-09 12:11:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 12:11:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:49,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:49,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:49,593 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1820767960, now seen corresponding path program 1 times [2020-12-09 12:11:49,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:49,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870320947] [2020-12-09 12:11:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:49,611 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:49,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367706806] [2020-12-09 12:11:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 12:11:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:11:49,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:11:49,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870320947] [2020-12-09 12:11:49,725 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:49,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367706806] [2020-12-09 12:11:49,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:11:49,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2020-12-09 12:11:49,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926684431] [2020-12-09 12:11:49,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:11:49,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:11:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:11:49,726 INFO L87 Difference]: Start difference. First operand 150 states and 187 transitions. Second operand 6 states. [2020-12-09 12:11:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:49,792 INFO L93 Difference]: Finished difference Result 222 states and 272 transitions. [2020-12-09 12:11:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:11:49,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-09 12:11:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:49,794 INFO L225 Difference]: With dead ends: 222 [2020-12-09 12:11:49,794 INFO L226 Difference]: Without dead ends: 133 [2020-12-09 12:11:49,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:11:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-09 12:11:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-12-09 12:11:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-09 12:11:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 154 transitions. [2020-12-09 12:11:49,812 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 154 transitions. Word has length 24 [2020-12-09 12:11:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:49,812 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 154 transitions. [2020-12-09 12:11:49,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:11:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 154 transitions. [2020-12-09 12:11:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 12:11:49,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:11:49,814 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:11:50,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-09 12:11:50,015 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:11:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:11:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash -375659692, now seen corresponding path program 1 times [2020-12-09 12:11:50,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:11:50,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446992648] [2020-12-09 12:11:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:11:50,030 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 12:11:50,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202978849] [2020-12-09 12:11:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:11:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 12:11:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:11:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:11:50,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:11:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:11:50,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446992648] [2020-12-09 12:11:50,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:11:50,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202978849] [2020-12-09 12:11:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236862912] [2020-12-09 12:11:50,361 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-09 12:11:50,361 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:11:50,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:11:50,362 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:11:50,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:11:50,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 12:11:51,188 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 12:11:51,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:11:51,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-09 12:11:51,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505867681] [2020-12-09 12:11:51,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 12:11:51,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:11:51,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 12:11:51,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-09 12:11:51,190 INFO L87 Difference]: Start difference. First operand 126 states and 154 transitions. Second operand 12 states. [2020-12-09 12:11:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:11:51,331 INFO L93 Difference]: Finished difference Result 126 states and 154 transitions. [2020-12-09 12:11:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:11:51,331 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-09 12:11:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:11:51,332 INFO L225 Difference]: With dead ends: 126 [2020-12-09 12:11:51,332 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 12:11:51,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-09 12:11:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 12:11:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 12:11:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 12:11:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 12:11:51,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-12-09 12:11:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:11:51,333 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 12:11:51,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 12:11:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 12:11:51,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 12:11:51,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:11:51,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 12:11:52,202 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-12-09 12:11:52,328 INFO L258 CegarLoopResult]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~y~0 1)) (.cse1 (<= 1 ULTIMATE.start_main_~x~0))) (or (and (= (+ ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~r~0) 0) (= ULTIMATE.start_main_~r~0 1) (= ULTIMATE.start_main_~q~0 1) (< ULTIMATE.start_main_~c~0 1) .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~a~0) (<= 0 ULTIMATE.start_main_~b~0) .cse1 (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~x~0 (* 2 ULTIMATE.start_main_~a~0)) (= ULTIMATE.start_main_~p~0 0)) (and (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 1) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse0 (= ULTIMATE.start_main_~r~0 0) (= ULTIMATE.start_main_~p~0 1) (= ULTIMATE.start_main_~s~0 1) .cse1 (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start_main_~b~0)))) [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point L35-3(lines 35 73) no Hoare annotation was computed. [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point L11(lines 11 14) no Hoare annotation was computed. [2020-12-09 12:11:52,329 INFO L258 CegarLoopResult]: At program point L11-2(lines 10 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~v~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~p~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~v~0 1) (= ULTIMATE.start_main_~d~0 1) (= ULTIMATE.start_main_~k~0 0) (<= ULTIMATE.start_main_~c~0 1) (= ULTIMATE.start_main_~r~0 0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~c~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~s~0 1) (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start_main_~b~0)) [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point L11-3(lines 11 14) no Hoare annotation was computed. [2020-12-09 12:11:52,329 INFO L258 CegarLoopResult]: At program point L11-5(lines 10 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~v~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~p~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~v~0 1) (= ULTIMATE.start_main_~d~0 1) (= ULTIMATE.start_main_~k~0 0) (<= ULTIMATE.start_main_~c~0 1) (= ULTIMATE.start_main_~r~0 0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~c~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~s~0 1) (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start_main_~b~0)) [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point L36(lines 36 37) no Hoare annotation was computed. [2020-12-09 12:11:52,329 INFO L258 CegarLoopResult]: At program point L11-8(lines 10 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~v~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~p~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~v~0 1) (= ULTIMATE.start_main_~d~0 1) (= ULTIMATE.start_main_~k~0 0) (<= ULTIMATE.start_main_~c~0 1) (= ULTIMATE.start_main_~r~0 0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~c~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~s~0 1) (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start_main_~b~0)) [2020-12-09 12:11:52,329 INFO L262 CegarLoopResult]: For program point L11-9(lines 11 14) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L258 CegarLoopResult]: At program point L11-11(lines 55 56) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~v~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~p~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~v~0 1) (= ULTIMATE.start_main_~d~0 1) (= ULTIMATE.start_main_~k~0 0) (<= ULTIMATE.start_main_~c~0 1) (= ULTIMATE.start_main_~r~0 0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~c~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~s~0 1) (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start_main_~b~0)) [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L11-12(lines 11 14) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L265 CegarLoopResult]: At program point L11-14(lines 10 16) the Hoare annotation is: true [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L258 CegarLoopResult]: At program point L49-2(lines 49 59) the Hoare annotation is: (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~v~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~p~0 1) (= ULTIMATE.start_main_~d~0 1) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 1) (= ULTIMATE.start_main_~k~0 0) (<= ULTIMATE.start_main_~c~0 1) (<= ULTIMATE.start_main_~y~0 1) (= ULTIMATE.start_main_~r~0 0) (= ULTIMATE.start_main_~c~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~s~0 1) (<= 1 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~q~0 0) (<= ULTIMATE.start_main_~a~0 1) (<= 1 ULTIMATE.start_main_~b~0)) [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2020-12-09 12:11:52,330 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 12:11:52,331 INFO L258 CegarLoopResult]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~a~0)) (.cse1 (= ULTIMATE.start_main_~p~0 1)) (.cse2 (<= ULTIMATE.start_main_~y~0 1)) (.cse3 (= ULTIMATE.start_main_~r~0 0)) (.cse4 (= ULTIMATE.start_main_~s~0 1)) (.cse5 (= ULTIMATE.start_main_~q~0 0)) (.cse6 (<= ULTIMATE.start_main_~a~0 1))) (or (and .cse0 .cse1 (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 1) (= ULTIMATE.start_main_~k~0 0) (<= ULTIMATE.start_main_~c~0 1) .cse2 .cse3 (= ULTIMATE.start_main_~c~0 ULTIMATE.start_main_~x~0) .cse4 (<= 1 ULTIMATE.start_main_~c~0) .cse5 .cse6 (<= 1 ULTIMATE.start_main_~b~0)) (and (= ULTIMATE.start_main_~k~0 1) (<= 0 ULTIMATE.start_main_~c~0) (<= ULTIMATE.start_main_~v~0 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~v~0 (* ULTIMATE.start_main_~d~0 ULTIMATE.start_main_~b~0)) .cse0 .cse1 (<= 1 ULTIMATE.start_main_~x~0) (< ULTIMATE.start_main_~x~0 (* 2 ULTIMATE.start_main_~b~0)) (= ULTIMATE.start_main_~b~0 (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0) (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0))) (< ULTIMATE.start_main_~c~0 1) .cse2 .cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse4 .cse5 .cse6))) [2020-12-09 12:11:52,331 INFO L262 CegarLoopResult]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2020-12-09 12:11:52,331 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-09 12:11:52,331 INFO L262 CegarLoopResult]: For program point L43(lines 43 44) no Hoare annotation was computed. [2020-12-09 12:11:52,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:11:52 BoogieIcfgContainer [2020-12-09 12:11:52,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:11:52,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:11:52,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:11:52,347 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:11:52,347 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:11:35" (3/4) ... [2020-12-09 12:11:52,349 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 12:11:52,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2020-12-09 12:11:52,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 12:11:52,357 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 12:11:52,357 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 12:11:52,387 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ae79891f-1ba4-4531-ac95-93927760727f/bin/utaipan/witness.graphml [2020-12-09 12:11:52,388 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:11:52,388 INFO L168 Benchmark]: Toolchain (without parser) took 16989.12 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 58.6 MB in the beginning and 56.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:11:52,389 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 79.7 MB. Free memory is still 56.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:11:52,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.42 ms. Allocated memory is still 79.7 MB. Free memory was 58.4 MB in the beginning and 48.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:11:52,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.40 ms. Allocated memory is still 79.7 MB. Free memory was 48.1 MB in the beginning and 46.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:11:52,389 INFO L168 Benchmark]: Boogie Preprocessor took 17.03 ms. Allocated memory is still 79.7 MB. Free memory was 46.6 MB in the beginning and 45.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:11:52,390 INFO L168 Benchmark]: RCFGBuilder took 395.18 ms. Allocated memory is still 79.7 MB. Free memory was 45.2 MB in the beginning and 37.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:11:52,390 INFO L168 Benchmark]: TraceAbstraction took 16353.68 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 36.6 MB in the beginning and 60.0 MB in the end (delta: -23.4 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:11:52,390 INFO L168 Benchmark]: Witness Printer took 40.91 ms. Allocated memory is still 96.5 MB. Free memory was 60.0 MB in the beginning and 56.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:11:52,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 79.7 MB. Free memory is still 56.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 153.42 ms. Allocated memory is still 79.7 MB. Free memory was 58.4 MB in the beginning and 48.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.40 ms. Allocated memory is still 79.7 MB. Free memory was 48.1 MB in the beginning and 46.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.03 ms. Allocated memory is still 79.7 MB. Free memory was 46.6 MB in the beginning and 45.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 395.18 ms. Allocated memory is still 79.7 MB. Free memory was 45.2 MB in the beginning and 37.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16353.68 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 36.6 MB in the beginning and 60.0 MB in the end (delta: -23.4 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. * Witness Printer took 40.91 ms. Allocated memory is still 96.5 MB. Free memory was 60.0 MB in the beginning and 56.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: 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 5 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((((b == v && 1 <= a) && p == 1) && d == 1) && 1 <= y) && b <= 1) && k == 0) && c <= 1) && y <= 1) && r == 0) && c == x) && s == 1) && 1 <= c) && q == 0) && a <= 1) && 1 <= b - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((((((((((b == v && 1 <= a) && p == 1) && b == y) && v <= 1) && d == 1) && k == 0) && c <= 1) && r == 0) && 1 == cond) && c == x) && s == 1) && 1 <= c) && q == 0) && a <= 1) && 1 <= b - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((((((b == v && 1 <= a) && p == 1) && b == y) && v <= 1) && d == 1) && k == 0) && c <= 1) && r == 0) && 1 == cond) && c == x) && s == 1) && 1 <= c) && q == 0) && a <= 1) && 1 <= b - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((((s + r == 0 && r == 1) && q == 1) && c < 1) && y <= 1) && 1 == cond) && r * y == a) && 0 <= b) && 1 <= x) && b <= c) && x < 2 * a) && p == 0) || ((((((((((1 <= y && b <= 1) && a == x) && y <= 1) && r == 0) && p == 1) && s == 1) && 1 <= x) && q == 0) && a <= 1) && 1 <= b) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((((1 <= a && p == 1) && 1 <= y) && b <= 1) && k == 0) && c <= 1) && y <= 1) && r == 0) && c == x) && s == 1) && 1 <= c) && q == 0) && a <= 1) && 1 <= b) || (((((((((((((((k == 1 && 0 <= c) && v <= b) && v == d * b) && 1 <= a) && p == 1) && 1 <= x) && x < 2 * b) && b == q * x + s * y) && c < 1) && y <= 1) && r == 0) && 1 == cond) && s == 1) && q == 0) && a <= 1) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((((((b == v && 1 <= a) && p == 1) && b == y) && v <= 1) && d == 1) && k == 0) && c <= 1) && r == 0) && 1 == cond) && c == x) && s == 1) && 1 <= c) && q == 0) && a <= 1) && 1 <= b - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((((((b == v && 1 <= a) && p == 1) && b == y) && v <= 1) && d == 1) && k == 0) && c <= 1) && r == 0) && 1 == cond) && c == x) && s == 1) && 1 <= c) && q == 0) && a <= 1) && 1 <= b - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.4s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 235 SDtfs, 795 SDslu, 741 SDs, 0 SdLazy, 973 SolverSat, 287 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 314 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=8, 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, 10 MinimizatonAttempts, 236 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 18 NumberOfFragments, 427 HoareAnnotationTreeSize, 8 FomulaSimplifications, 2773 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 345 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 54544 SizeOfPredicates, 68 NumberOfNonLiveVariables, 843 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 36/52 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...