./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS --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 3f64d9b496c4f5484a31fbfb0a7c6af8258ace1e653eee382e318ab929fd1285 --- 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-8393723 [2022-11-19 06:49:10,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:49:10,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:49:10,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:49:10,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:49:10,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:49:10,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:49:10,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:49:10,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:49:10,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:49:10,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:49:10,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:49:10,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:49:10,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:49:10,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:49:10,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:49:10,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:49:10,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:49:10,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:49:10,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:49:10,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:49:10,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:49:10,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:49:10,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:49:10,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:49:10,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:49:10,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:49:10,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:49:10,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:49:10,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:49:10,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:49:10,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:49:10,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:49:10,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:49:10,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:49:10,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:49:10,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:49:10,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:49:10,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:49:10,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:49:10,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:49:10,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:49:10,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:49:10,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:49:10,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:49:10,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:49:10,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:49:10,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:49:10,441 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:49:10,441 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:49:10,442 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:49:10,442 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:49:10,443 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:49:10,443 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:49:10,443 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:49:10,443 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:49:10,444 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:49:10,444 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:49:10,444 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:49:10,444 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:49:10,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:49:10,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:49:10,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:49:10,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:49:10,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:49:10,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:49:10,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:49:10,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:49:10,448 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:49:10,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:49:10,449 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:49:10,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:49:10,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:49:10,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:49:10,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:49:10,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:49:10,469 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:49:10,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:49:10,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:49:10,470 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:49:10,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:49:10,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:49:10,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:49:10,471 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_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f64d9b496c4f5484a31fbfb0a7c6af8258ace1e653eee382e318ab929fd1285 [2022-11-19 06:49:10,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:49:10,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:49:10,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:49:10,720 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:49:10,721 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:49:10,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound1.c [2022-11-19 06:49:10,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/data/d532704d6/1b97e7cccb4b49e0b8d8e9ecf27c8033/FLAGebb1c30c5 [2022-11-19 06:49:11,226 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:49:11,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound1.c [2022-11-19 06:49:11,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/data/d532704d6/1b97e7cccb4b49e0b8d8e9ecf27c8033/FLAGebb1c30c5 [2022-11-19 06:49:11,589 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/data/d532704d6/1b97e7cccb4b49e0b8d8e9ecf27c8033 [2022-11-19 06:49:11,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:49:11,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:49:11,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:49:11,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:49:11,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:49:11,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:11,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a3c686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11, skipping insertion in model container [2022-11-19 06:49:11,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:11,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:49:11,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:49:11,870 WARN L234 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_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound1.c[538,551] [2022-11-19 06:49:11,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:49:11,913 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:49:11,930 WARN L234 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_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound1.c[538,551] [2022-11-19 06:49:11,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:49:11,960 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:49:11,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11 WrapperNode [2022-11-19 06:49:11,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:49:11,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:49:11,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:49:11,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:49:11,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:11,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,001 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-19 06:49:12,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:49:12,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:49:12,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:49:12,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:49:12,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,030 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:49:12,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:49:12,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:49:12,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:49:12,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (1/1) ... [2022-11-19 06:49:12,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:49:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:12,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:49:12,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:49:12,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:49:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:49:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:49:12,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:49:12,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:49:12,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:49:12,189 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:49:12,191 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:49:12,357 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:49:12,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:49:12,407 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:49:12,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:12 BoogieIcfgContainer [2022-11-19 06:49:12,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:49:12,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:49:12,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:49:12,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:49:12,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:49:11" (1/3) ... [2022-11-19 06:49:12,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11096eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:49:12, skipping insertion in model container [2022-11-19 06:49:12,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:49:11" (2/3) ... [2022-11-19 06:49:12,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11096eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:49:12, skipping insertion in model container [2022-11-19 06:49:12,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:12" (3/3) ... [2022-11-19 06:49:12,430 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound1.c [2022-11-19 06:49:12,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:49:12,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:49:12,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:49:12,520 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;@16d8aff4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:49:12,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:49:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:49:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:49:12,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:12,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:12,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 151460259, now seen corresponding path program 1 times [2022-11-19 06:49:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:12,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939473504] [2022-11-19 06:49:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:12,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939473504] [2022-11-19 06:49:12,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 06:49:12,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297835509] [2022-11-19 06:49:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:12,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:12,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:12,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:49:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 06:49:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:49:12,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297835509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:12,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:12,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:49:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496815134] [2022-11-19 06:49:12,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:49:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:49:13,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:49:13,034 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 06:49:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:13,105 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-11-19 06:49:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:49:13,108 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-19 06:49:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:13,116 INFO L225 Difference]: With dead ends: 43 [2022-11-19 06:49:13,120 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 06:49:13,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:49:13,134 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:13,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:49:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 06:49:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 06:49:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:49:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-11-19 06:49:13,203 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2022-11-19 06:49:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:13,205 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-11-19 06:49:13,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 06:49:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-11-19 06:49:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:49:13,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:13,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:13,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:13,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:13,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash -310598151, now seen corresponding path program 1 times [2022-11-19 06:49:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411248698] [2022-11-19 06:49:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:13,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:49:13,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:13,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411248698] [2022-11-19 06:49:13,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411248698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:13,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:13,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:49:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931934615] [2022-11-19 06:49:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:13,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:49:13,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:49:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:49:13,629 INFO L87 Difference]: Start difference. First operand 20 states and 29 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) [2022-11-19 06:49:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:13,742 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-11-19 06:49:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:49:13,743 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 [2022-11-19 06:49:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:13,744 INFO L225 Difference]: With dead ends: 33 [2022-11-19 06:49:13,744 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 06:49:13,745 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 [2022-11-19 06:49:13,746 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:13,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 06:49:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-11-19 06:49:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:49:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-19 06:49:13,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2022-11-19 06:49:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:13,760 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-19 06:49:13,760 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) [2022-11-19 06:49:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-19 06:49:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:49:13,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:13,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:49:13,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -751211152, now seen corresponding path program 1 times [2022-11-19 06:49:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129147668] [2022-11-19 06:49:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:13,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:13,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129147668] [2022-11-19 06:49:13,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 06:49:13,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440700594] [2022-11-19 06:49:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:13,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:13,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:13,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:49:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:49:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:49:13,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:13,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440700594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:13,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:13,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:49:13,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090577307] [2022-11-19 06:49:13,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:13,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:49:13,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:49:13,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:49:13,961 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-19 06:49:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:14,026 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-11-19 06:49:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:49:14,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-19 06:49:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:14,028 INFO L225 Difference]: With dead ends: 39 [2022-11-19 06:49:14,028 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 06:49:14,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:49:14,031 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:14,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 06:49:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 06:49:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:49:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-19 06:49:14,051 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2022-11-19 06:49:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:14,052 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-19 06:49:14,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-19 06:49:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-19 06:49:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:49:14,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:14,054 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:14,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 06:49:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:14,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1841718534, now seen corresponding path program 1 times [2022-11-19 06:49:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226584932] [2022-11-19 06:49:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:49:14,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226584932] [2022-11-19 06:49:14,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226584932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:14,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:14,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:49:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613697666] [2022-11-19 06:49:14,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:14,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:49:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:49:14,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:49:14,441 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:49:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:14,521 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-19 06:49:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:49:14,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 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 [2022-11-19 06:49:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:14,523 INFO L225 Difference]: With dead ends: 39 [2022-11-19 06:49:14,524 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 06:49:14,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:14,526 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:14,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:14,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 06:49:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-19 06:49:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:49:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-19 06:49:14,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-19 06:49:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:14,540 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-19 06:49:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:49:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-19 06:49:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:49:14,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:14,542 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:49:14,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1224204839, now seen corresponding path program 1 times [2022-11-19 06:49:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:14,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018184492] [2022-11-19 06:49:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:14,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:14,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788026813] [2022-11-19 06:49:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:14,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:14,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:14,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:49:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:49:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:49:14,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:49:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:49:15,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:15,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018184492] [2022-11-19 06:49:15,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:15,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788026813] [2022-11-19 06:49:15,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788026813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:49:15,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449028192] [2022-11-19 06:49:15,105 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 06:49:15,105 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:49:15,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:49:15,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:49:15,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:49:15,480 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 06:49:15,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:49:16,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1449028192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:16,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:49:16,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-19 06:49:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251046279] [2022-11-19 06:49:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:49:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:49:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:49:16,045 INFO L87 Difference]: Start difference. First operand 30 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:49:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:16,216 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-11-19 06:49:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:49:16,217 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-19 06:49:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:16,218 INFO L225 Difference]: With dead ends: 49 [2022-11-19 06:49:16,218 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 06:49:16,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:49:16,219 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:16,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 70 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 06:49:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-19 06:49:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:49:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-19 06:49:16,261 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2022-11-19 06:49:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:16,261 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-19 06:49:16,261 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:49:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-19 06:49:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:49:16,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:16,263 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:16,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:16,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:16,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1437524276, now seen corresponding path program 1 times [2022-11-19 06:49:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:16,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505371241] [2022-11-19 06:49:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:16,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:16,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712208284] [2022-11-19 06:49:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:16,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:16,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:16,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:49:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:49:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:49:16,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:16,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:16,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505371241] [2022-11-19 06:49:16,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:16,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712208284] [2022-11-19 06:49:16,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712208284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:16,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:16,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:49:16,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011180596] [2022-11-19 06:49:16,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:16,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:49:16,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:16,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:49:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:16,698 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2022-11-19 06:49:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:16,780 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-19 06:49:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:49:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 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 [2022-11-19 06:49:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:16,782 INFO L225 Difference]: With dead ends: 59 [2022-11-19 06:49:16,782 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 06:49:16,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:49:16,783 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:16,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 06:49:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-19 06:49:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:49:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-19 06:49:16,800 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2022-11-19 06:49:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:16,800 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-19 06:49:16,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2022-11-19 06:49:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-19 06:49:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 06:49:16,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:16,802 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:16,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:17,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:17,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 964329913, now seen corresponding path program 1 times [2022-11-19 06:49:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614644639] [2022-11-19 06:49:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:17,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:17,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:17,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460256663] [2022-11-19 06:49:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:17,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:17,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:17,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:49:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:17,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:49:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:49:17,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:49:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:49:17,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614644639] [2022-11-19 06:49:17,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460256663] [2022-11-19 06:49:17,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460256663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:49:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811208097] [2022-11-19 06:49:17,402 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:49:17,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:49:17,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:49:17,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:49:17,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:49:18,035 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2022-11-19 06:49:18,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:49:19,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1117#(and (<= ~counter~0 3) (= |__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 [2022-11-19 06:49:19,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:49:19,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:49:19,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-19 06:49:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753252031] [2022-11-19 06:49:19,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:49:19,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:49:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:49:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:49:19,799 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 06:49:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:19,968 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-11-19 06:49:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:49:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-11-19 06:49:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:19,971 INFO L225 Difference]: With dead ends: 70 [2022-11-19 06:49:19,971 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 06:49:19,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:49:19,972 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:19,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 73 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:49:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 06:49:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2022-11-19 06:49:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:49:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-11-19 06:49:19,990 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 27 [2022-11-19 06:49:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:19,991 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-11-19 06:49:19,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 06:49:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-11-19 06:49:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:49:19,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:19,994 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:20,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:20,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:20,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1744858475, now seen corresponding path program 1 times [2022-11-19 06:49:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:20,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415568324] [2022-11-19 06:49:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:20,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123162941] [2022-11-19 06:49:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:20,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:20,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:20,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:20,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:49:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:49:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 06:49:20,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:20,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:20,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415568324] [2022-11-19 06:49:20,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:20,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123162941] [2022-11-19 06:49:20,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123162941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:20,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:20,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:49:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452288020] [2022-11-19 06:49:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:49:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:20,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:49:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:49:20,325 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:49:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:20,394 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-11-19 06:49:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:49:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-19 06:49:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:20,399 INFO L225 Difference]: With dead ends: 69 [2022-11-19 06:49:20,399 INFO L226 Difference]: Without dead ends: 61 [2022-11-19 06:49:20,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:20,400 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:20,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:49:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-19 06:49:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-19 06:49:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:49:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-11-19 06:49:20,428 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 30 [2022-11-19 06:49:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:20,429 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-11-19 06:49:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:49:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-11-19 06:49:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:49:20,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:20,434 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:20,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 06:49:20,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:20,638 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash -12098523, now seen corresponding path program 1 times [2022-11-19 06:49:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:20,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493324054] [2022-11-19 06:49:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:20,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:20,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351128163] [2022-11-19 06:49:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:20,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:20,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:20,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:20,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:49:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:20,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:49:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:49:20,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:20,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493324054] [2022-11-19 06:49:20,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351128163] [2022-11-19 06:49:20,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351128163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:20,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:49:20,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:49:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713848339] [2022-11-19 06:49:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:49:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:49:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:49:20,774 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 06:49:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:20,809 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-11-19 06:49:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:49:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-19 06:49:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:20,812 INFO L225 Difference]: With dead ends: 73 [2022-11-19 06:49:20,812 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 06:49:20,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:49:20,815 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:20,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:49:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 06:49:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-19 06:49:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:49:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-11-19 06:49:20,849 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 30 [2022-11-19 06:49:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:20,850 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-11-19 06:49:20,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 06:49:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-11-19 06:49:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 06:49:20,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:20,853 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:20,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:21,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:21,059 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 359487494, now seen corresponding path program 1 times [2022-11-19 06:49:21,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303742212] [2022-11-19 06:49:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:21,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:21,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:49:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282679491] [2022-11-19 06:49:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:21,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:21,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:49:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:49:21,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:49:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:49:21,206 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:49:21,207 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:49:21,208 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:49:21,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:49:21,413 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:21,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:49:21,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:49:21 BoogieIcfgContainer [2022-11-19 06:49:21,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:49:21,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:49:21,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:49:21,448 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:49:21,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:49:12" (3/4) ... [2022-11-19 06:49:21,450 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 06:49:21,508 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 06:49:21,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:49:21,509 INFO L158 Benchmark]: Toolchain (without parser) took 9916.47ms. Allocated memory was 119.5MB in the beginning and 207.6MB in the end (delta: 88.1MB). Free memory was 76.9MB in the beginning and 164.5MB in the end (delta: -87.7MB). Peak memory consumption was 1.5MB. Max. memory is 16.1GB. [2022-11-19 06:49:21,509 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 119.5MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:49:21,509 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.62ms. Allocated memory is still 119.5MB. Free memory was 76.6MB in the beginning and 93.4MB in the end (delta: -16.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:49:21,510 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.37ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 92.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:49:21,510 INFO L158 Benchmark]: Boogie Preprocessor took 28.95ms. Allocated memory is still 119.5MB. Free memory was 92.1MB in the beginning and 90.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:49:21,511 INFO L158 Benchmark]: RCFGBuilder took 378.41ms. Allocated memory is still 119.5MB. Free memory was 90.9MB in the beginning and 77.4MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 06:49:21,511 INFO L158 Benchmark]: TraceAbstraction took 9034.63ms. Allocated memory was 119.5MB in the beginning and 207.6MB in the end (delta: 88.1MB). Free memory was 76.7MB in the beginning and 167.7MB in the end (delta: -91.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:49:21,511 INFO L158 Benchmark]: Witness Printer took 60.04ms. Allocated memory is still 207.6MB. Free memory was 167.7MB in the beginning and 164.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 06:49:21,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 119.5MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.62ms. Allocated memory is still 119.5MB. Free memory was 76.6MB in the beginning and 93.4MB in the end (delta: -16.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.37ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 92.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.95ms. Allocated memory is still 119.5MB. Free memory was 92.1MB in the beginning and 90.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 378.41ms. Allocated memory is still 119.5MB. Free memory was 90.9MB in the beginning and 77.4MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9034.63ms. Allocated memory was 119.5MB in the beginning and 207.6MB in the end (delta: 88.1MB). Free memory was 76.7MB in the beginning and 167.7MB in the end (delta: -91.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 60.04ms. Allocated memory is still 207.6MB. Free memory was 167.7MB in the beginning and 164.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L35] EXPR counter++ VAL [A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L35] COND TRUE counter++<1 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L35] EXPR counter++ VAL [A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L35] COND FALSE !(counter++<1) [L45] EXPR counter++ VAL [A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L45] COND FALSE !(counter++<1) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.9s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 106 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 84 mSDsluCounter, 626 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 407 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 406 IncrementalHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 219 mSDtfsCounter, 406 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=8, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 30 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 785 SizeOfPredicates, 14 NumberOfNonLiveVariables, 557 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 118/140 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: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 21, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 31, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, 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: 12, 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: 4, 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: 75, DAG_COMPRESSION_RETAINED_NODES: 35, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 06:49:21,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d14fda3-72a4-41ea-935b-8cbddd51a2e8/bin/utaipan-I9t0OCRTmS/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE