./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur --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 4b6ae28789704f5fd465d11d450ce27cd9b971ac76fe8e36268d0ace5b5b057f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:39:34,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:39:34,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:39:34,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:39:34,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:39:34,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:39:34,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:39:34,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:39:34,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:39:34,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:39:34,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:39:34,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:39:34,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:39:34,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:39:34,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:39:34,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:39:34,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:39:34,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:39:34,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:39:34,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:39:34,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:39:34,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:39:34,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:39:34,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:39:34,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:39:34,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:39:34,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:39:34,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:39:34,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:39:34,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:39:34,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:39:34,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:39:34,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:39:34,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:39:34,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:39:34,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:39:34,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:39:34,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:39:34,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:39:34,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:39:34,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:39:34,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:39:34,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:39:34,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:39:34,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:39:34,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:39:34,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:39:34,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:39:34,557 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:39:34,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:39:34,558 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:39:34,558 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:39:34,559 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:39:34,559 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:39:34,559 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:39:34,560 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:39:34,560 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:39:34,560 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:39:34,560 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:39:34,560 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:39:34,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:39:34,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:39:34,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:39:34,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:39:34,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:39:34,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:39:34,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:39:34,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:39:34,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:39:34,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:39:34,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:39:34,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:39:34,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:39:34,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:39:34,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:39:34,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:39:34,565 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:39:34,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:39:34,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:39:34,566 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:39:34,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:39:34,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:39:34,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:39:34,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6ae28789704f5fd465d11d450ce27cd9b971ac76fe8e36268d0ace5b5b057f [2022-11-26 00:39:34,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:39:34,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:39:34,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:39:34,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:39:34,942 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:39:34,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2022-11-26 00:39:38,043 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:39:38,242 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:39:38,243 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2022-11-26 00:39:38,249 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/data/5c4cacf47/5c66b085721c4929ac3198b1f43f2048/FLAG178b22a2c [2022-11-26 00:39:38,267 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/data/5c4cacf47/5c66b085721c4929ac3198b1f43f2048 [2022-11-26 00:39:38,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:39:38,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:39:38,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:39:38,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:39:38,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:39:38,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9e980b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38, skipping insertion in model container [2022-11-26 00:39:38,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:39:38,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:39:38,516 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c[520,533] [2022-11-26 00:39:38,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:39:38,560 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:39:38,578 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c[520,533] [2022-11-26 00:39:38,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:39:38,613 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:39:38,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38 WrapperNode [2022-11-26 00:39:38,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:39:38,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:39:38,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:39:38,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:39:38,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,652 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-26 00:39:38,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:39:38,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:39:38,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:39:38,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:39:38,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:39:38,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:39:38,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:39:38,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:39:38,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:39:38,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:38,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:39:38,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:39:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:39:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:39:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:39:38,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:39:38,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:39:38,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:39:38,853 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:39:38,855 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:39:39,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:39:39,070 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:39:39,071 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:39:39,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:39 BoogieIcfgContainer [2022-11-26 00:39:39,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:39:39,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:39:39,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:39:39,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:39:39,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:39:38" (1/3) ... [2022-11-26 00:39:39,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebdb932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:39:39, skipping insertion in model container [2022-11-26 00:39:39,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (2/3) ... [2022-11-26 00:39:39,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebdb932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:39:39, skipping insertion in model container [2022-11-26 00:39:39,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:39" (3/3) ... [2022-11-26 00:39:39,090 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound20.c [2022-11-26 00:39:39,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:39:39,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:39:39,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:39:39,187 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70266a41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:39:39,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:39:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:39:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:39:39,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:39,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:39:39,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:39,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1839711150, now seen corresponding path program 1 times [2022-11-26 00:39:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:39,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930081104] [2022-11-26 00:39:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:39,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930081104] [2022-11-26 00:39:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930081104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:39,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:39,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:39:39,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746588929] [2022-11-26 00:39:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:39,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:39:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:39:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:39:39,449 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:39,494 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-26 00:39:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:39:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:39:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:39,506 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:39:39,506 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:39:39,510 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:39:39,515 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:39,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:39:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:39:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:39:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-26 00:39:39,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-26 00:39:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:39,558 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-26 00:39:39,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-26 00:39:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:39:39,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:39,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:39:39,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1660498327, now seen corresponding path program 1 times [2022-11-26 00:39:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:39,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913166687] [2022-11-26 00:39:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:39,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913166687] [2022-11-26 00:39:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913166687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:39,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:39:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591975172] [2022-11-26 00:39:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:39:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:39:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:39:39,721 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:39,739 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-26 00:39:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:39:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:39:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:39,741 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:39:39,741 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:39:39,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:39:39,743 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:39,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:39:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 00:39:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:39:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-26 00:39:39,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-26 00:39:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:39,751 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-26 00:39:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-26 00:39:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:39:39,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:39,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:39,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:39:39,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1658830031, now seen corresponding path program 1 times [2022-11-26 00:39:39,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:39,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835916502] [2022-11-26 00:39:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:39,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835916502] [2022-11-26 00:39:39,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835916502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:39,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:39,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345741790] [2022-11-26 00:39:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:39,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:39:39,961 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:40,034 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-26 00:39:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:39:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:40,038 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:39:40,038 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:39:40,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:39:40,041 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:40,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:39:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-26 00:39:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:39:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-26 00:39:40,064 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-26 00:39:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:40,065 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-26 00:39:40,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-26 00:39:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:39:40,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:40,068 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:40,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:39:40,069 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1386799727, now seen corresponding path program 1 times [2022-11-26 00:39:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:40,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424349743] [2022-11-26 00:39:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:40,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:39:40,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865099776] [2022-11-26 00:39:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:40,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:40,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:40,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:39:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:39:40,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:40,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:40,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424349743] [2022-11-26 00:39:40,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:39:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865099776] [2022-11-26 00:39:40,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865099776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1843477620] [2022-11-26 00:39:40,685 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:39:40,685 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:40,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:40,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:40,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:40,928 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 00:39:40,952 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:41,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1843477620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:41,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:39:41,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-26 00:39:41,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419729661] [2022-11-26 00:39:41,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:41,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:39:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:39:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:39:41,427 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:41,608 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-26 00:39:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:39:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-26 00:39:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:41,610 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:39:41,610 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 00:39:41,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:39:41,611 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:41,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 46 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 00:39:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-26 00:39:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:39:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-26 00:39:41,623 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-26 00:39:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:41,624 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-26 00:39:41,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:39:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-26 00:39:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:39:41,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:41,625 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:41,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:41,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:41,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:41,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1311551190, now seen corresponding path program 1 times [2022-11-26 00:39:41,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248407766] [2022-11-26 00:39:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:41,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:39:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164156687] [2022-11-26 00:39:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:41,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:41,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:41,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:39:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:39:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:39:41,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:39:42,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248407766] [2022-11-26 00:39:42,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:39:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164156687] [2022-11-26 00:39:42,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164156687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641140214] [2022-11-26 00:39:42,042 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:39:42,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:42,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:42,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:42,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:43,776 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-26 00:39:43,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:44,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '597#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:44,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:44,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:39:44,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-26 00:39:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777275100] [2022-11-26 00:39:44,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:44,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:39:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:39:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:39:44,407 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:39:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:44,557 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2022-11-26 00:39:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:39:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2022-11-26 00:39:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:44,562 INFO L225 Difference]: With dead ends: 71 [2022-11-26 00:39:44,562 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 00:39:44,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:39:44,565 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:44,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 00:39:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-11-26 00:39:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:39:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2022-11-26 00:39:44,599 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 25 [2022-11-26 00:39:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:44,599 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2022-11-26 00:39:44,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:39:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2022-11-26 00:39:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:39:44,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:44,600 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:44,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:44,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1309882894, now seen corresponding path program 1 times [2022-11-26 00:39:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791049982] [2022-11-26 00:39:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:44,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:39:44,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648381145] [2022-11-26 00:39:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:44,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:44,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:44,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:39:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:39:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:39:44,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:39:45,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791049982] [2022-11-26 00:39:45,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:39:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648381145] [2022-11-26 00:39:45,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648381145] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:45,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:39:45,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 00:39:45,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137688953] [2022-11-26 00:39:45,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:45,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:45,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:45,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:45,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:39:45,011 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:39:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:45,067 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-11-26 00:39:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:39:45,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-26 00:39:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:45,069 INFO L225 Difference]: With dead ends: 72 [2022-11-26 00:39:45,070 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 00:39:45,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:39:45,072 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:45,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:45,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 00:39:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-26 00:39:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:39:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-26 00:39:45,100 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 25 [2022-11-26 00:39:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:45,101 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-26 00:39:45,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:39:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-26 00:39:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:39:45,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:45,103 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:45,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:45,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2092232782, now seen corresponding path program 2 times [2022-11-26 00:39:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:45,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061616337] [2022-11-26 00:39:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:45,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:39:45,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771342453] [2022-11-26 00:39:45,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:39:45,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:45,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:45,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:45,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:39:45,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:39:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:39:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:39:45,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:39:45,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061616337] [2022-11-26 00:39:45,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:39:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771342453] [2022-11-26 00:39:45,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771342453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129201126] [2022-11-26 00:39:45,686 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:39:45,686 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:45,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:45,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:45,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:46,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-26 00:39:46,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:47,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1360#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 21) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:47,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:47,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:39:47,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-26 00:39:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434147852] [2022-11-26 00:39:47,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:47,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:39:47,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:39:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:39:47,209 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:39:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:47,487 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-26 00:39:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:39:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-11-26 00:39:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:47,490 INFO L225 Difference]: With dead ends: 81 [2022-11-26 00:39:47,490 INFO L226 Difference]: Without dead ends: 76 [2022-11-26 00:39:47,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:39:47,491 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:47,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 57 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-26 00:39:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-26 00:39:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:39:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-26 00:39:47,507 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2022-11-26 00:39:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:47,507 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-26 00:39:47,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:39:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-26 00:39:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:39:47,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:47,509 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-26 00:39:47,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:47,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1503837811, now seen corresponding path program 3 times [2022-11-26 00:39:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:47,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162698086] [2022-11-26 00:39:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:47,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:39:47,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503430644] [2022-11-26 00:39:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:39:47,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:47,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:47,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:39:47,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:39:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:39:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 58 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-26 00:39:49,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 00:39:55,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:55,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162698086] [2022-11-26 00:39:55,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:39:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503430644] [2022-11-26 00:39:55,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503430644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:55,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933970705] [2022-11-26 00:39:55,749 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:39:55,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:55,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:55,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:55,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:56,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-26 00:39:56,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:00,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 21) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:00,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:00,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:40:00,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-26 00:40:00,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328351912] [2022-11-26 00:40:00,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:00,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:40:00,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:00,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:40:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=413, Unknown=2, NotChecked=0, Total=506 [2022-11-26 00:40:00,718 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 00:40:03,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:04,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:06,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:08,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:10,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:12,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:14,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:16,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:20,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:20,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:20,745 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-11-26 00:40:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:40:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 53 [2022-11-26 00:40:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:20,747 INFO L225 Difference]: With dead ends: 83 [2022-11-26 00:40:20,747 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:40:20,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=116, Invalid=532, Unknown=2, NotChecked=0, Total=650 [2022-11-26 00:40:20,748 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:20,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 88 Invalid, 3 Unknown, 0 Unchecked, 18.6s Time] [2022-11-26 00:40:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:40:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:40:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:40:20,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2022-11-26 00:40:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:20,750 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:40:20,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 00:40:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:40:20,750 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:40:20,753 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:40:20,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:40:20,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:40:20,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 00:40:35,994 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-26 00:40:35,994 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 00:40:35,995 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-26 00:40:35,995 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-26 00:40:35,995 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-26 00:40:35,995 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-26 00:40:35,995 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-26 00:40:35,995 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 00:40:35,995 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-26 00:40:35,995 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-26 00:40:35,996 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-26 00:40:35,996 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-26 00:40:35,996 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-26 00:40:35,996 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-26 00:40:35,996 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-26 00:40:35,996 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-26 00:40:35,996 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-26 00:40:35,996 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-26 00:40:35,999 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-11-26 00:40:36,000 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:40:36,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:40:36 BoogieIcfgContainer [2022-11-26 00:40:36,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:40:36,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:40:36,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:40:36,019 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:40:36,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:39" (3/4) ... [2022-11-26 00:40:36,022 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:40:36,028 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-26 00:40:36,031 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-26 00:40:36,031 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-26 00:40:36,031 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:40:36,032 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:40:36,062 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:40:36,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:40:36,063 INFO L158 Benchmark]: Toolchain (without parser) took 57788.15ms. Allocated memory was 155.2MB in the beginning and 268.4MB in the end (delta: 113.2MB). Free memory was 115.5MB in the beginning and 235.0MB in the end (delta: -119.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:40:36,063 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:40:36,063 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.03ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 104.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:40:36,064 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.19ms. Allocated memory is still 155.2MB. Free memory was 104.4MB in the beginning and 102.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:40:36,064 INFO L158 Benchmark]: Boogie Preprocessor took 40.57ms. Allocated memory is still 155.2MB. Free memory was 102.9MB in the beginning and 101.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:40:36,064 INFO L158 Benchmark]: RCFGBuilder took 378.54ms. Allocated memory is still 155.2MB. Free memory was 101.5MB in the beginning and 91.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:40:36,065 INFO L158 Benchmark]: TraceAbstraction took 56936.35ms. Allocated memory was 155.2MB in the beginning and 268.4MB in the end (delta: 113.2MB). Free memory was 90.3MB in the beginning and 237.1MB in the end (delta: -146.8MB). Peak memory consumption was 120.2MB. Max. memory is 16.1GB. [2022-11-26 00:40:36,065 INFO L158 Benchmark]: Witness Printer took 43.91ms. Allocated memory is still 268.4MB. Free memory was 237.1MB in the beginning and 235.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:40:36,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.03ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 104.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.19ms. Allocated memory is still 155.2MB. Free memory was 104.4MB in the beginning and 102.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.57ms. Allocated memory is still 155.2MB. Free memory was 102.9MB in the beginning and 101.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 378.54ms. Allocated memory is still 155.2MB. Free memory was 101.5MB in the beginning and 91.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 56936.35ms. Allocated memory was 155.2MB in the beginning and 268.4MB in the end (delta: 113.2MB). Free memory was 90.3MB in the beginning and 237.1MB in the end (delta: -146.8MB). Peak memory consumption was 120.2MB. Max. memory is 16.1GB. * Witness Printer took 43.91ms. Allocated memory is still 268.4MB. Free memory was 237.1MB in the beginning and 235.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 56.8s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 20.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 116 SdHoareTripleChecker+Valid, 19.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 424 SdHoareTripleChecker+Invalid, 19.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 271 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 522 IncrementalHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 153 mSDtfsCounter, 522 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 420 GetRequests, 317 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 173 HoareAnnotationTreeSize, 44 FomulaSimplifications, 118 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2132 FormulaSimplificationTreeSizeReductionInter, 15.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 165 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 1298 SizeOfPredicates, 14 NumberOfNonLiveVariables, 422 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 407/446 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: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 16, TOOLS_QUANTIFIERELIM_TIME: 0.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 27, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 10, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 56, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && a * a + 1 + 2 * a == s RESULT: Ultimate proved your program to be correct! [2022-11-26 00:40:36,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b0e3cfd-ee60-4fac-b10a-b552d636cc85/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE